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Volume 64, Issue 4
Displaying 1-21 of 21 articles from this issue
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Masahiko TAMAKI, Keisuke YOSHIMATSU, Toshiro HORINO1995 Volume 64 Issue 4 Pages 677-681
Published: December 05, 1995
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSThe amylographic characteristics of milled rice and mineral contents (including nitrogen) of brown rice, which were produced under an organic farming culture (no chemical ferilizers, all of the rice residues returned to the paddy fields) were determined for 1 to as long as 16 years. The maximum viscosity and breakdown values of rice flour increased with increasing duration of the organic farming culture. The contents of minerals in the rice grain, produced one year after the beginning of organic farming culture, were similar to those of the rice from a customary farming culture. The N, P and K contents decreased with the duration of organic farming culture, but the Mg content increased gradually. These changes in the content of the elements were the greatest during the first 5 years. The Mg/K ratio, which is thought to be a suitable index of the eating quality of cooked rice, gave significant correlations with both the maximum viscosity and breakdown values. These results suggested that the eating quality of cooked rice by organic farming culture was better due to increases of rice starch stickiness and of the Mg/K ratio.View full abstractDownload PDF (552K) -
Satoko TOMIMORI, Yuichi NAGAYA, Yutaka TASHIRO, Tetsuro TANIYAMA1995 Volume 64 Issue 4 Pages 682-691
Published: December 05, 1995
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSWe researched the amount of chemical fertilizer used on a golf course, fertilizer nutrients and flows in the drainage from the golf course every 4 or 8 days during the period from June 1993 to May 1994. Using these data, the exhaust characteristics of fertilizer nutrients were clarified and these loads in the drainage were estimated through survey. The results were as follows : Seven kinds of chemical fertilizers were used in the golf course and a total of about 28 tons of fertilizer were supplied in a year. A large quantity of chemical fertilizer was sprayed on the putting green. Regarding the exhaust characteristic in the drainages, total nitrogen was detected a few days after fertilizer application and showed the highest concentration in May 1994 when lots of fertilizer was given. Total phosphorus was measured immediately after fertilizer application and higher concentrations were found in the spring. The load in the drainage from the golf course was 4 times total nitrogen and 43 times total phosphorus in comparison with those from the forest. From these results, it is suggested that the drainage from golf course pollutes irrigation water, river, drinking water and ground water widely.View full abstractDownload PDF (979K) -
Tomoyuki YUKAWA, Yoshiaki WATANABE1995 Volume 64 Issue 4 Pages 692-697
Published: December 05, 1995
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSVarietal differences in degree of polymerization (DP) of fructan in basal stem including leaf sheath of 29 wheat varieties relating on pedigree of breeding were investigated. Most of the varieties contained a large amount of short-chain fructan in comparison with long-chain fructan. Varietal differences in DP distribution changed largely in accordance with the changes in short-chain fructan. In order to clarify the profiles of DP distribution of fructan in varieties, cluster analysis based on the contents of mono- and disaccharides, short- and long-chain fructan was applied. The varieties were grouped into 4 clusters, namely high and low fructan groups, Velvet and Hon-iku 49. Velvet and Hon-iku 49 are unique in that they contained a lot of long-chain fructan, implying that they are available as genetic resources to increase the fructan contents which is a key factor for wintering ability.View full abstractDownload PDF (652K) -
Tomohiko YOSHIDA1995 Volume 64 Issue 4 Pages 698-702
Published: December 05, 1995
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSNo grain crops are usually grown after harvesting early-season rice of northern Kyushu. If early maturing crops could be cultured after the rice harvest of mid August, more solar energy could be captured in the paddy field in a year. Sorghum, common millet, foxtail millet, barnyard millet, buckwheat and barley were sown in August to be grown after early-season rice and harvested in October-November. About 0.2% of solar energy was fixed by the grain of these crops. Maximum LAI in August sowing culture was smaller than in the conventional culture. CGR and solar energy utilization for dry matter production in August sowing were higher in the early stages than in the late stages, showing rapid growth of these crops in the early stages. Grain yield of sorghum, common millet and foxtail millet sown August 10th were 151-131gm-2. The yield of barnyard millet was low, and the yield of buckwheat was relatively constant for sowing August 10th to 30th. A greater decrease in the yield of foxtail millet by the decrease of effective accumulated temperature was observed than in the case of sorghum and barnyard millet. Some promising lines of sorghum and barley having higher yield and earlier heading were found for August sowing culture.View full abstractDownload PDF (637K) -
Takeshi YAMAGUCHI, Yukindo TSUNO, Junichi NAKANO, Reiko MANO1995 Volume 64 Issue 4 Pages 703-708
Published: December 05, 1995
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSThe measurement of bleeding from the basal part of the stem had been applied to estimation for root activity of rice. However, the bleeding rate (BL) showed wide variation among test plants. We investigated the relationship between various factors on BL variation and the relationship between BL and root respiration under conditions of paddy fields during the period from young panicle formation to ripening stage in rice. BL, which was got from the stump of stem at 12cm from the soil surface, was strongly decreased due to transpiration of leaves of other stems in the measured hill. Therefore, all of the stems in a hill were cut for the measurement of BL. There was a positive correlation between BL per stem and cross sectional area (AS) on basal stem, and large stem had a high value of BL per AS. The relationship between BL and soil temperature within the range 7 to 29°C could be expressed with an exponential curve of temperature quotient (Q10) of 2.2, nearly the same value of root respiration. After the booting stage, the relationship between root respiration and BL per stem showed a highly positive correlation. Measurement of BL could be recommended as a useful method for estimation of root activity, especially at the ripening period.View full abstractDownload PDF (737K) -
Yuji MATSUE1995 Volume 64 Issue 4 Pages 709-713
Published: December 05, 1995
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSUnder the low air temperature and the insufficient solar radiation conditions in 1993, the influence of the abnormal weather on palatability and physicochemical characteristics of rice were studied. Palatability of rice produced in 1993 was lower compared to rice produced in 1992. Milled rice produced in 1993 showed higher protein and amylose contents, and lower maximum viscosity and breakdown values than those of rice produced in 1992. The deterioration of palatability was due to the increase of protein and amylose contents and the decrease of maximum viscosity and breakdown values. There was a positive relationship between maximum viscosity and palatability.View full abstractDownload PDF (536K) -
Yuji MATSUE1995 Volume 64 Issue 4 Pages 714-716
Published: December 05, 1995
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSUnder the low air temperature and the insufficient solar radiation conditions in 1993, the effect of seedling characteristics on the palatability and physicochemical characteristics of rice were studied. The values of overall eating quality rice from 3-4 leaved age seedlings were better than young seedlings. The good palatability rice from 3-4 leaved age seedling showed that palatability amelioration could be attributed to the lower protein and amylose contents and higher maximum viscosity and breakdown values. It was concluded that the differences in the palatability and physicochemical characteristics of rice from 3-4 leaved age and young seedlings were caused by the differences in air temperature during the ripening period and by the extent of grain filling, which was closely related to full heading.View full abstractDownload PDF (436K) -
Kouichi KASHIWABA, Toshiaki MATSUDA, Nobuo CHONAN1995 Volume 64 Issue 4 Pages 717-725
Published: December 05, 1995
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSDeveloping leguminous seeds are laid down the reserves accumulation in the parenchyma cells of the cotyledone. The sequence of protein accumulation of developing broad bean seeds has been followed by scanning and transmission electron microscopy. At the early maturation stage, protein was initially deposited in central vacuoles. The central vacuoles were rapidly subdivided to form many smaller protein-filled vacuoles. These vacuoles were surrounded by developed rough endoplasmic reticulum (RER). From the middle of maturation and on, the developed RER system was maintained in the cytoplasm. Transmission eletron microscopy revealed that vacuoles filled up with reserve protein were seen to be surrounded by increased RER and highly electron-dense vesicles. These vesicles increasd during protein accumulation and have some relation with protein transport. The terminal of RER becomes a dilated structure, in which protein bodies appear to be formed. However, this structure decreased at a later stage of maturation. The protein vesicles become the mature protein bodies at the last stage of maturation. Starch grain formation was rapidly proceeded in plastids at during the middle of maturation. It is suggested that protein accumulation of developing broad bean seeds is closely related with RER, and that protein bodies are formed by two pathways : subdivision from central vacuoles, and the protein deposition in the dilated RER.View full abstractDownload PDF (1172K) -
Hironori MIMOTO, Kiyoyuku IMAI, Hiroyuki DAIMON, Masamichi OHE1995 Volume 64 Issue 4 Pages 726-733
Published: December 05, 1995
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSWe clarified that the degrees of the difference in color between outside and inside half-leaves were unexpectedly large, which ranged from 1.3 to 5.4 values by the Minolta chlorophyll meter SPAD-502 (corresponding to 0.1 to 0.5% N content) in three Japanese and three American cultivars. The color intensity of a half-leaf with an outside margin in the leaf sheath wrapping (outside half-leaf) was deeper and its width was narrower than that of an inside half-leaf. There was a regularity in the growth pattern of leaves, namely, a deep-colored half-leaf (outside half-leaf) and a light-colored half-leaf (inside half-leaf) were disposed on the stem with a regular alternation in order of the well-known right- and left-handed emergence of leaves. This meant that the position of an outside (or inside) half-leaf in the (n)th leaf was governed concordantly by the previous (n-1)th leaf. This concordance tended to appear from the third leaf position, and the concordance ratio was low at lower early-emerging leaves, and high at upper late-emerging leaves as already described. A 100% ratio of concordance was obtained at the higher leaf positions than at the sixth or seventh leaf in this experiment. The chance of a left (or right) half-leaf becoming an outside (or inside) half-leaf was approximately 50%. When seeds were centrifugalized to determine the effects of centrifugal force on leaf emergence at germination, the chance of the centrifugalized side becoming an outside half-leaf was increased.View full abstractDownload PDF (948K) -
Mitsuo SAITO, Yusuke GOTO, Kazuhiro MATSUMORI, Yoshinori YAMAMOTO1995 Volume 64 Issue 4 Pages 734-739
Published: December 05, 1995
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSA method of greening of nursling seedlings raised in nursery chamber, characteristics of these seedlings and transplanting accuracy to paddy field were investigated. Rice cultivar Sasanishiki seed was sowed on two types (I, II) of culture media which had different materials and amounts of fertilizer applied. It was raised in a nursery chamber kept at 31°C for 4 days. Nursery boxes were treated by applying the piling-method, then re-piled up on the two nursery chambers' shelves at intervals of 14 cm at 30 hours after sowing. One nursery chamber was kept warm using a light-proof cover (dark section). The other was kept warm using a clear air-cap-sheet (light section). The nursery chamber of the light section was lighted by artificial light. As this treatment made leaves green, this seedling could be called "green nursling seedling". Plant height of the light section was equal to or shorter than that of the dark section, but second leaf blade length was the opposite. Seedlings in the light section were hard and elastic. Nursling seedling raised on type II medium grew more than the 6 cm in length required for the transplanting machine. Although the endosperm would be enough for 4 days' raising after sowing, the difference in culture medium influenced the seedling's characters. So, consideration of the culture medium's materials is important. Transplanting accuracy of the light section's seedlings was better than the dark's. Judging from these results, greening will improve the physical characters of seedlings.View full abstractDownload PDF (729K) -
Masataka YAMASHITA, Toshio TAKYU, Tetsuji SABA1995 Volume 64 Issue 4 Pages 740-746
Published: December 05, 1995
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSRegeneration and activity of roots after root pruning have been studied using mature (18-year old) tea plants grown in a field. The amount of the newly-developed white roots in a 20 cm deep-soil layer was greatest in the late September I plot (combination of hard root pruning and nitrogen application in late September every several years) followed by the late August I plot (light root pruning at every late August : the most conventional management) and late Autust II and late September II plots (combination of hard root and shoot pruning in late August or late September every several years). Root activity determined by an activable tracer method accurately reflected the degree of root reproduction. Root pruning and root-shoot pruning remarkably restrained subsequent shoot growth. These growth reactions of shoot and root to root pruning obtained through the present experiment resembled those in young tea plants. It was confirmed that root pruning is applicable as one of the techiniques for regenerating tea plants irrespective of age because root pruning promoted active reproduction of roots in mature plants. It was judged that the activable tracer method in tea plants is effective to grasp the root activity in soil layers at a practical level.View full abstractDownload PDF (814K) -
S.M.Moslem UDDIN, Seiichi MURAYAMA, Yukio ISHIMINE, Eiji TSUZUKI, Jiro ...1995 Volume 64 Issue 4 Pages 747-753
Published: December 05, 1995
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSAn experiment was conduced to study the effects of a mixture of charcoal with pyroligneous acid (charcoal 4 : pyroligneous acid 1 ; Sannekka E) on dry matter production and root growth of summer planted sugarcane. Sugarcane variety NCo 310 was tested against four levels of Sannekka E (SE) ; 0 (control), 200, 400, and 800 Kg 10a-1 and the experiment was laid out in a randomized complete block design with five replications. Yield contributing characters, such as stalk number, stalk length, stalk diameter and sugar content in stalks were increased by application of SE. Values of CGR, NAR and LAI of SE treated crops were higher in comparison to those of the controls. The correlation coefficients between CGR and NAR, and CGR and LAI were significant. The yield of cane stalks, sugar and total dry matter content in SE treated plots had been increased by 13-24%, 19-31% and 14-20%, respectively, over the controls. The highest cane stalk yield (11.4 kg m-2), sugar yield (1.95 kg m-2) and total dry matter content (4.4 kg m-2) were obtained by the application of SE of 400 kg 10a-1. Root content in unit soil cover depths was higher in SE treated plots.View full abstractDownload PDF (726K) -
Tatsuhiko SHIRAIWA, Ushio HASHIKAWA1995 Volume 64 Issue 4 Pages 754-759
Published: December 05, 1995
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSSeed productivity of old and modern soybean cultivars was analyzed in relation to accumulation and partitioning of nitrogen during seed filling. Four soybean cultivars were grown on a drained paddy field (silty caly loam). Dry weight and nitrogen content were determined for above ground parts weekly from the beginning of seed filling to maturity. The modern cultivars Enrei and Tachinagaha exhibited greater dry matter and nitrogen accumultaions during seed filling and greater seed yield in comparison with the old cultivars Akazaya and Mizukuguri. Seed nitrogen per top nitrogen (Nseed/Ntop) incresed linearly against days after the beginning of seed filling, while leaf nitrogen per top nitrogen (Nleaf/Ntop) decreased linearly. Cultivar differnces in nitrogen partitioning were quite small. Thus Nleaf was mainly dependent on Ntop. Nitrogen harvest index (Nseed/Ntop at maturity) was not very restrictive to either nitrogen yield or seed yield. It is concluded that the observed difference in seed productivity among old and modern cultivars was associated more with nitrogen accumulation during seed filling than with its partitioning pattern.View full abstractDownload PDF (665K) -
Kazuyuki SAITOU, Waichi AGATA, Takeshi KAWARABATA, Yuko YAMAMOTO, Fumi ...1995 Volume 64 Issue 4 Pages 760-766
Published: December 05, 1995
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSBy DEAE-cellulose anion exchange column chromatography, three different forms of NAD-dependent malate dehydrogenase (EC 1.1.1.37) (NAD-MDH) were isolated from leaves of Mesembryanthemum crystallinum L. in the crassulacean acid metabolism mode. NAD-MDH that eluted last from an anion exchange column was purified to a specific activity of 1, 096 units·(mg protein)-1 using Blue Sepharose CL-6B chromatography. Citrate and adenosine 5'-triphosphate effectively inhibited the activity of NAD-MDH. The inhibition of the enzymatic activity by citrate was reversed by inorganic phosphate and the degree of reversal increased with increasing the concentration of oxaloacetate, the substrate of the reaction. The optimal pH for NAD-MDH activity was around 7.5. Citrate inhibited the enzymatic activity over a wide range of pH and caused a shift in the optimal pH. The enzymatic activity in the presence of citrate was increased by adding inorganic phosphate below pH 7.5. On the basic side, higher than pH 7.5, however, the inhibition by citrate was enhanced by adding inorganic phosphate.View full abstractDownload PDF (791K) -
Yoshie S. MOMONOKI, Kougo MIYOSHI, Hideo KAMIMURA1995 Volume 64 Issue 4 Pages 767-776
Published: December 05, 1995
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSGlehnia littoralis Fr. Schm. is very popular as a flavored wild vegetable and the roots are a useful crude drug. However, cultivation of Glehnia is extremely expensive because of the short harvest period. This work was conducted to clarify the propagability of Glehnia from different explants and mature embryos isolated from seeds. Only axillary buds formed about 30 shoots with good root formation in the medium containing BA 1-5 μM+NAA 5 μM. By mature embryo culture, about 40 shoots with 80% root formation per embryo explants were obtained on media containing BA 1 μM+NAA 5 μM. For callus formation from mature embryos, media containing 2, 4-D 1 μM or NAA 5 μM were best, showing that callus was formed from about 90% of embryo explants. Glehnia callus produced by embryo explants induced about 45 embryoids in suspension culture for 4 weeks when cultivated on medium containing 2, 4-D, Then, each embryoid formed about 30 shoots with roots in the MS solid medium. These multiple shoots with roots vigorously grew into plants following acclimatization. Thus, induction of multiple shoots derived from embryoids through calli, which were formed from one mature embryo, may be an effective method of mass producing Glehnia plants compared to formation of multiple shoots from axillary buds or mature embryos.View full abstractDownload PDF (990K) -
Peiwu WANG, Akihiro ISODA, Guozhi WEI1995 Volume 64 Issue 4 Pages 777-783
Published: December 05, 1995
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSYield and dry matter production were examined under water-stress conditions. Two cultivars (Zhengzhuta 2 and Heinong 33) were grown in a concrete-framed field. From the flowering to the pod-filling stage, four levels of irrigation treatments were carried out (Treatment I, II, III and IV-from the severst, Treatment I to the non water stressed, Treatment IV). The growing periods were shorter with increasing amount of irrigation. Zhengzhuta 2 had larger shoot dry weight than Heinong 33 in every irrigation treatment. Dry weight of each organ tended to increase with increasing amount of irrigation during the treatment. Shoot dry weight ceased to increase in Treatment IV, but increased in the other treatments after the treatment. Percentage dry weight were higher in leaf and root of Zhengzhuta 2, and in pod of Heinong 33. Crop growth rates (CGRs), leaf area indices (LAIs), net assimilation rates (NARs) and pod growth rates (PGRs) were generally higher with increasing irrigation for both cultivars. CGR was closely related to LAI during the treatment. Pod, seed number and seed yield were greater in the plots with greater amount of irrigation. Zhengzhuta 2 had 540O kg ha-1 in Treatment IV. It's high-yielding potential seemed to be related to it's efficient leaf epansion and radiation interception ability.View full abstractDownload PDF (772K) -
Mikio NOMURA, Katsu IMAI, Toshiaki MATSUDA1995 Volume 64 Issue 4 Pages 784-793
Published: December 05, 1995
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSRice plants were grown in artificially illuminated growth cabinets under combinations of atmospheric partial pressure of CO2 (35 vs. 70 Pa) and phosphorus (P) nutrition (3 vs. 300 μM) to examine their effects on the ultrastructure of rice chloroplasts. The 9th and flag (terminal) leaves were harvested 3 days after full expansion and ultrathin sections were prepared for transmission electron microscopy. In general, starch accumulation was observed in both the mesophyll and the vascular bundle sheath cell chloroplasts with more accumulation in the former. In the 9th leaf, chloroplasts developed under ambient CO2 (35 Pa) accumulated starch grains at deficient P (3 μM) but these grains decreased at sufficient P (300 μM). On the other hand, chloroplasts under high CO2 (70 Pa) accumulated few starch grains at deficient P but the grains increased at sufficient P. In the flag leaf, starch accumulation increased with increasing CO2 and P levels. Under high CO2 and sufficient P, several huge, spherical starch grains accumulated and the thylakoids and grana were deformed. These observations suggested that in the 9th leaf, the high CO2 promoted photosynthesis and produced too much carbohydrate to translocate irrespective of sufficient P, and in the flag leaf starch accumulation decreased the capacity of electron transport in addition to the feedback inhibition of carbon reduction.View full abstractDownload PDF (2013K) -
Takeaki NISHIZAWA, Hiroshi SUGE1995 Volume 64 Issue 4 Pages 794-800
Published: December 05, 1995
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSEthylene stimulated the elongation of maize mesocotyls of whole seedings under red light. Maximum elongation was obtained with 1μl1-1 ethylene. The length of mesocotyls was still much longer than in ethylene-free air when ethylene concentrations were increased to 10, 100 or 1, 000μl1-1. Ethylene also induced lateral expansion of mesocotyls at ethylene concentrations of 0.1μl1-1 or above and the diameter increased at higher ethylene concentratins. Carbon dioxide, in the range of 1-4%, also stimulated mesocotyl extension and expansion. Maximum growth of mesocotyls was obtained in a mixture of ethylene and carbon dioxide. Removal of either endogenously evolved ethylene or carbon dioxide or of both gases reduced elongation. In contrast to the effects in red light, ethylene inhibited the growth of mesocotyls in darkness while carbon dioxide inhibited this effect of ethylene. Thus, ethylene and carbon dioxide acted cooperatively under red light and antagonistically in darkness.View full abstractDownload PDF (761K) -
Tomoyuki YUKAWA, Makoto KOBAYASHI, Yoshiaki WATANABE, Shinro YAMAMOTO1995 Volume 64 Issue 4 Pages 801-806
Published: December 05, 1995
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSThe mechanisms of fructan accumulation by changes in sucrose-sucrose fructosyl transferase (SST; EC 2.4.1.99) and fructan exohydrolase (FEH; EC 3.2.1.80) under cold treatments (2°C, 6°C) were investigated using varieties of wheat (Triticum aestivum L. cv. Norin 61 and Yukichabo) differing in fructan accumulation. Fructan concentration increased with the increase in SST activity and decrease in FEH activity under cold treatments. The acumulation of fructans was accelerated with high activity of SST at 2°C treatment, suggesting the participation of SST in fructan accumulation. The variety of Norin 61, which has lower fructan accumulation, contained higher activity of FEH, and the fructan concentration of Norin 61 decreased with increasing FEH activity from the 10th day under 6°C treatment, suggesting that the varietal difference in fructan accumulation is affected largely by the level of FEH activity. The relationship between fructan accumulation and growth habit in the varieties is discussed.View full abstractDownload PDF (643K) -
Tadao C. KATAYAMA, Akio SUMI1995 Volume 64 Issue 4 Pages 807-814
Published: December 05, 1995
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSTo identify some characteristics of Oryza glaberrima in grain morphology, length (L), width (W) and thickness (T) of unhusked grain were determined for two cultivated species, i.e. O.sativa and O.glaberrima, three African wild species, i.e. O.breviligulata, O.longistaminata and O.punctata, and three Asian wild species, i.e. O.perennis, O.sativa var. spontanea and O.officinalis. O.glaberrima and O.breviligulata, which belong to the Series Glaberrima, showed flatter grain shape than 4 species of Series Sativa, i.e. O.sativa, O.sativa var. spontanea, O.perennis and O.longistaminata. The two species from Series Glaberrima were positioned within the following ranges in W/T, L/T and L/W: W/T>1.45, L/T>3.75, L/W>-4.88×W/T+9.95. The two cultivated species had larger grain volume than six wild rice species. The ancestral species, such as O.perennis and O.breviligulata can be characterized among wild species by the large grain volume. Large grain cultivars were found in abundance in African O.sativa varieties as compared to Indian varieties. Although a large difference in grain volume could not be found between the two cultivated species, weedy strains of O.glaberrima, which have not been grown as cultivated species, had apparently smaller grain volume. These results suggest that the decrement of O.glaberrima had been done centering around strains of small grain, and that selection pressure for large grain was strong in Africa over that in Asia.View full abstractDownload PDF (867K) -
[in Japanese], [in Japanese], [in Japanese]1995 Volume 64 Issue 4 Pages 815-821
Published: December 05, 1995
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSDownload PDF (826K)
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