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Volume 21, Issue 2
Displaying 1-8 of 8 articles from this issue
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Takeo Sasahara1971 Volume 21 Issue 2 Pages 61-68
Published: April 30, 1971
Released on J-STAGE: May 16, 2008
JOURNAL FREE ACCESSStructural factors in the palisade parenchyma were investigated in relation to photosynthetic activity. Photosynthetic activity per leaf area was positively correlated with total cell surface area per leaf area and a total leaf areal nitrogen content. Photosynthetic activity per total nitrogen content was positivel y correlated with total cell surface area : total nitrogen content ratio and leaf area : total nitrogen content ratio.View full abstractDownload PDF (1300K) -
Yoshihiro Takano, Shigesaburo Tsunoda1971 Volume 21 Issue 2 Pages 69-76
Published: April 30, 1971
Released on J-STAGE: May 16, 2008
JOURNAL FREE ACCESSThe photosynthetic rate per unit leaf area (PA) was positively and curvilinearly related to leaf areal nitrogen content. A quadratic estimation for PA in content was proposed for cultivated varieties of sativa. A further increase in leaf areal nitrogen content may produce a higher PA. The photosynthetic rate per unit leaf nitrogen was negatively related to leaf areal nitrogen content. Further, differences in PA between leaves with different nitrogen contents were not marked under low light intensities. High leaf areal nitrogen content may not necessarily be favorable when the plants are grown under lower nitrogen supply and/or light intensity levels.View full abstractDownload PDF (912K) -
Isao Shimura, Masazumi Yasuno, Chuso Otomo1971 Volume 21 Issue 2 Pages 77-80
Published: April 30, 1971
Released on J-STAGE: May 16, 2008
JOURNAL FREE ACCESSThe pollination tests were conducted to clarify the period of female flower receptivity and the effects of the pollination time on the number of nuts in the burr. The results are reported here.View full abstractDownload PDF (921K) -
Yakichi Noguchi, Tetsuo Nakajima, Toshihiko Yamaguchi1971 Volume 21 Issue 2 Pages 81-86
Published: April 30, 1971
Released on J-STAGE: May 16, 2008
JOURNAL FREE ACCESSThe aged rice plants produced their flower bud primordia by fewer short-day treatments and under longer day-length as compared to the young plants. On the other hand, the floral initiation of the plants showing high intensity in the vigour of vegetative growth was delayed than that of the plants showing low intensity, although both the plants were sown on the same date. From these facts, it is inferred that aging effect on floral induction is due to the decrease in the vigour of vegetative growth during the course of development.View full abstractDownload PDF (695K) -
Takuma Gamo, Shizuo Ichiba1971 Volume 21 Issue 2 Pages 87-92
Published: April 30, 1971
Released on J-STAGE: May 16, 2008
JOURNAL FREE ACCESSThe hydrolyzing ratio (R) by enzymic digestion of the fibroin isolated from cocoon filaments was different hereditarily among silkworrh strains. Selection experiments on the R value was carried out for 2 or 3 generations successively by the inbreeding of moths producing cocoons giving high or low value. The R value and size of cocoons were significantly different between the high and low lines. Since the reelability was higher in the low line of R values, the determinatjon of R values can be usefull for a measure in selection experiments on reelability of cocoons.View full abstractDownload PDF (814K) -
F.E. Binet, Morikazu Shikata1971 Volume 21 Issue 2 Pages 93-99
Published: April 30, 1971
Released on J-STAGE: May 16, 2008
JOURNAL FREE ACCESSMathematical expressions and their numerical evaluations are presented for the proportion of homozygosity by common descent, under continuous full-sib-mating, at a single, triallelic, sex-linked locus and at a single, diallelic, autosomal locus.View full abstractDownload PDF (937K) -
Michio Matsuoka1971 Volume 21 Issue 2 Pages 100-105
Published: April 30, 1971
Released on J-STAGE: May 16, 2008
JOURNAL FREE ACCESSTwo different patterns were recognized in the changes of germination capacity of Hemerocallis pollen tested on agar plate during 24∼39 hours before and after blooming. H. fulva var. Iittorea and several varieties of H. dumortierii except var. exaltata showed high percentages of pollen germination even before the time of blooming, while the pollen of other species germinated well only after blooming. Pollens stored at 5°C for about a month could be successfully used for practical pollination.View full abstractDownload PDF (812K) -
hiroshi Ikehashi, Ryuji Ito1971 Volume 21 Issue 2 Pages 106-113
Published: April 30, 1971
Released on J-STAGE: May 16, 2008
JOURNAL FREE ACCESSWhen plant type indices are given by the quotients of two quantitative traits following normal law, the statistical means are studied to evaluate, from statistics of component traits, (1) heritability value of the indices, (2) the regression function of the quotient on its component traits and (3) the correlation coefficient between components and the quotient. And the usefulness of such indices are suggested as the result of the application of these means to the experimental data in rice breeding.View full abstractDownload PDF (876K)
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