All issues
Volume 29, Issue 2
Displaying 1-9 of 9 articles from this issue
- |<
- <
- 1
- >
- >|
-
YAMASHITA, Atsushi, Yasuo UKAI1979 Volume 29 Issue 2 Pages 101-114
Published: June 01, 1979
Released on J-STAGE: May 16, 2008
JOURNAL FREE ACCESSFrom 5136 M1 spike progenies, raised from gamma-ray irradiations and EI treatments on dormant seeds of a six-rowed barley varlety "Chlkurin lbaraki No. 1" (EXp. SD 66) and a semidwarf mutant derived from the variety (Exp. SD 68), a total of 146 progenies which segregated for sterile mutants were isolated. In Exp. SD 66, the frequency of mutated M1 spike progenies increased with the increased dose from O.5 to 2.0% for gamma-rays and from 1.5 to 6.2% for EI. In Exp. SD 68, the dose response of the frequency was similar to that in Exp. SD 66. Relative efiiciency for induction of sterile mutation to chlorophyl mutation was quite different between gamma-rays and EI. In gamma-ray irradiation the mutation rate on M2 plant basis was one sixth of the chlorophyl mutation rate through the doses applied and years of experiment. In EI treatment, the ratio was one third, as illustrated clearly in Fig.1, indicating that EI treatment was relatively two times more effective for induction of sterile mutation than gamma-ray irradiation.View full abstractDownload PDF (1337K) -
Nobumichi INOMATA1979 Volume 29 Issue 2 Pages 115-120
Published: June 01, 1979
Released on J-STAGE: May 16, 2008
JOURNAL FREE ACCESSStudies on development in vitro of excised ovaries in the cross of B. caprrpestris L. ssp. chileensis (L.) MAKlNO cv. Seppaku-taina X B. oleracea L. var. acephala DC. cv. Portugal-kale were carried out on various culture media and on various sucrose concen-trations. Ovaries excised 4 days after pollination were cultured ile vitro. In the experiment of various cuture media, the media used were solution of minerals and vitamins of WHITE (1963), NITSCH (1951), HELLER (1953), NITSCH and NITSCH (1969), and MURASHIGE and SKOOG (1962) respectively. The media of NITSCH (1951) and HELLER (1953) were added with WHITE'S vitarnins. A11 media were further added with 50g/l of sucrose and 8g/l of agar. Many seeds and well developed naked-embryos protruded from undeveloped seed coat were obtained in the capsules examined. Production rate (Number of seeds and naked-embryos/Number of capsules examined) of hybrid plants was better in NITSCH and NlTSCH's, and MURASHIGE and SKOOG's minerals than in other culture minerals (WHITE, NITSCH and HELLER). In the experiment of various sucrose concentrations, the medium was composed of WHITE'S medium (1963) supplemented with 8g/l, of agar. Concentration of sucrose in the medium was 50g/l, 70g/l, 90g/l, IIOg/l, 130g/l, 150g/l, 170g/l, 190g/l and 210g/l respectively. High concentration of sucrose in the medium was not harmful in produc-tion of the hybrid plants by culture in vitro of excised ovaries.View full abstractDownload PDF (623K) -
Motokazu MATSUBAYASHI, Shuji Misoo1979 Volume 29 Issue 2 Pages 121-132
Published: June 01, 1979
Released on J-STAGE: May 16, 2008
JOURNAL FREE ACCESSTwo *crroups of the hybrids obtained from ver with the TUB and COM species, except for clem, showed equally re*o'ular meiosis, both showin*o' 1211 in 76-98 of the cells at metaphase I and only a few irregularities in chromosome behavior at the later stages. The two were also alike in possessing the pollen fcrtility reduced by 20 or so frcnrl that of their parents. However, the verXTUB amphidiploids showed as hi*o'h multivalent frequencies as, but the verXCOM ones had multivalents in significantly lower irequency than, those found in their respective parental autotetraploids, indicating a more frequent occurrence of preferential pairin*o- arisino' from differential affinity between thc chromo-somes in the latter than in the former. Unlike the above two instances, the hybrids, verXcmm, were characterized by the presence of a multipartite configuration resulting from interchange heterozygosity in 50% or more of the cells and, as a result:, by the considerably reduced pollen fertility. Thus, these results, taking data on the crossability into consideration, may be inter-preted as suggesting that the genornes of ryb and stn are homoloous, thougrh not identical, with the ver genome, those of chc and slt are somewhat differentiated from it, and cle1e has a genome which is differentiated fi-om the ver genome to a greater de*crree than either of the preceding species, though basically similar.View full abstractDownload PDF (2711K) -
Torao GOTOH1979 Volume 29 Issue 2 Pages 133-145
Published: June 01, 1979
Released on J-STAGE: May 16, 2008
JOURNAL FREE ACCESSThis work was planned to identify the spring gene or genes involved in several Japanese common wheat cultivars which are important in Japan and show the spring habit of growth. As the tester stocks, a set of isolines differing each other only in a single spring gene in the same genetic background of the cultivar Triple Dirk was used. Prior to the allelic tests, the genetic constitution of these isolines, received from PUGSLEY, were retested. The results indicated that the four spring genes, Vrn 1, Vrn 2, Vrn 3 and Vrn 4, were all inherited independently and incompletely dominant over the alleles for winter habit. Eight important spring wheat cultivars in Japan were then crossed to the T'riple Dirk tester stocks and also to one winter wheat cultivar, in order to identify the genes for spring habit of growth involved. It was made clear that wheat cultivars indigenous to Japan and also those developed from hybridization between them have a single spring gene Vrn 3 in common. On the other hand, the Vrn 1 gene was found to be the main spring gene involved in wheat cultivars developed from hybridization between Japanese wheats and foreign ones. It was assumed that the Vrle3 gene was original for Japanese wheat cultivars and those having Vrn 3 were more suitable to the growing conditions in southern Japan than the cultivars with Vrn I which were developed from hybridization between Japanese wheats and foreign ones and were usually susceptible to frost damage.View full abstractDownload PDF (1254K) -
Kyo WAKASA, Yoshio WATANABE1979 Volume 29 Issue 2 Pages 146-150
Published: June 01, 1979
Released on J-STAGE: May 16, 2008
JOURNAL FREE ACCESSA haploid plant of Oryza perelenis (spontaleea type) was obtained through anther culture, which is one of the wild relatives of cultivated rice, O. sativa L.. In MI of PMCS of the haploid, no bivalent was observed in 70% of the cells examined, while I to 2 bivalents were met with in 30% of the cells.. Haploid perenleis was similar to haploid sativa not only, in meiotic chromosome beha-viour but also in morphology. It resulted in complete sterility in pollen and seed fcrtilities.View full abstractDownload PDF (1475K) -
Yuzo FUTSUHARA, Sadaaki KONDO, Hidemi KITANO, Masahiro MII1979 Volume 29 Issue 2 Pages 151-158
Published: June 01, 1979
Released on J-STAGE: May 16, 2008
JOURNAL FREE ACCESSIn order to get information on the genetical mechanism of panicle formation in rice, the character expression of lax panicle rice and its mode of inheritance were inves-tigated. It was observed that the panicle density of rice was dependent not only on the number of spikelets and panicle length, but also on the total number and total length of primary and secondary branches, although their effects on the panicle density varied largely according to the cultivars and strains used in this study. Thus, we recommend the ratio of total spikelets to total length of rachis and primary branches of panicle as the most efiicient method to determine the panicle density in rice at least in so far as the cultivars and strains used in this study are concerned. The spikelet formation of a strain, Soryuto, which has a high laxness, was remarkably responsive to low temperature. When this strain was treated with low temperature at the panicle differentiation stage, various kinds of malformed spikelets were frequently induced. In the extreme cases, no spikelet developed on the panicle branches. In the cross between Soryuto and the dwarf mutant strain induced from a cultivar, Akibare, by X-irradiation, it was found that Soryuto carried a singie recessive gene responsible for the lax: panicle, which was independent of the dwarf gene. The pronounced gene interaction was also observed between the lax panicle gene and the dwarf gene.View full abstractDownload PDF (2209K) -
Eihide MONMA, Shigesaburo TSUNODA1979 Volume 29 Issue 2 Pages 159-165
Published: June 01, 1979
Released on J-STAGE: May 16, 2008
JOURNAL FREE ACCESSDifferences in net C02 uptake of single, attached leaves among slngle cros;s F1's of two combinations, parental inbred lines, a varietal cross F1 and parental open-pollinated varieties were observed. Heterozygous types, i, e. single-cross and varietal cross F1's and open-pollinated varieties, showed a definitely higher photosynthetic rate per unit leaf area as compared with inbreds. The photosynthetic rate per unit leaf area (PA) tended to be positively related to the nitrogen, chlorophyll and d, ry matter cc, ntent per unit leaf area. High PA of the heterozygous types was partly attributable to their higher nitrogen, chlorophyll and dry matter content per unit leaf area. Within inbreds as well as within heterozygous types, photosynhtetic rate per unit leaf nitrogen (nitrogen efficiency), the rate per unit chlorophyll (chlorophyll efiiciency) and the rate per unit leaf dry matter (dry matter efficiency) tended to be negatively related to the nitrogen, chlorophyll and the dry matter content per unit leaf area, respectively. Taking this general trend into account, the authors pointed out that the nitrogen, chlorophyll and dry matter efficiencies of the heterozygous types were definitely higher than those of inbreds. High PA of the heterozygous types seems to be primarily related to their high nitrogen, chlorophyll and dry matter efficiencies. High PA of the heterozygous types was closely associated with their high relative growth rate. Estimation of PA with a fcw leaves of a fcw plants may be useful In predicting the hybrid vigor.View full abstractDownload PDF (717K) -
[in Japanese], [in Japanese], [in Japanese], [in Japanese]1979 Volume 29 Issue 2 Pages 166-170
Published: June 01, 1979
Released on J-STAGE: May 16, 2008
JOURNAL FREE ACCESSDownload PDF (943K) -
[in Japanese], [in Japanese], [in Japanese]1979 Volume 29 Issue 2 Pages 171-173
Published: June 01, 1979
Released on J-STAGE: May 16, 2008
JOURNAL FREE ACCESSDownload PDF (437K)
- |<
- <
- 1
- >
- >|