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Volume 18, Issue 6
Displaying 1-6 of 6 articles from this issue
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Morikazu Shikata1968 Volume 18 Issue 6 Pages 307-314
Published: December 31, 1968
Released on J-STAGE: May 16, 2008
JOURNAL FREE ACCESSAssuming a pedigree of full-sibbing, recombination effect on homozygosity by descent is studied numerically. Taking into consideration two linked loci, formulae for generalized inbreeding coefficient and coefficient of parentage are shown. Under several initial conditions, resulting degrees of homozygosity by descent are calculated. Considerable effect of recombination is observed on homozygosity by descent in many cases.View full abstractDownload PDF (848K) -
Naohide Hiratsuka, Shoji Sato, Yoshiharu Eguchi1968 Volume 18 Issue 6 Pages 315-326
Published: December 31, 1968
Released on J-STAGE: May 16, 2008
JOURNAL FREE ACCESSThe writers attempted the inoculation experiments with the uredospores in order to determine the susceptibility of varieties or strains of 16 species of Triticum to the cereal rusts and their related species obtained from different localities of Japan proper.View full abstractDownload PDF (1317K) -
Eizo Maeda1968 Volume 18 Issue 6 Pages 327-332
Published: December 31, 1968
Released on J-STAGE: May 16, 2008
JOURNAL FREE ACCESSThe inclination of the lamina of rice leaves is due to cell elongation and promoted by IAA. An irradiation of excised leaf segments with X- or gamma-rays interrupted the inclination. Recovery was observed 24 to 48 hours after irradiation.View full abstractDownload PDF (786K) -
K Kawano, M Takahashi1968 Volume 18 Issue 6 Pages 333-345
Published: December 31, 1968
Released on J-STAGE: May 16, 2008
JOURNAL FREE ACCESSNegative varietal correlation between plant weight and nitrogen content of the plant is not genetic per se, but rather developmental. It is caused by the interaction of genetic system taking charge of growth rate at early vegetative phase with the amount of environmental nitrogen supply. The relative abundance of nitrogen supply to the plant is the factor responsible fcr the "closeness" of negative correlation. Because of big genotype-environment interaction, the usefulness of heritability and genetic correlation, on the basis of true genetic variation, would be much reduced in characters like plant weight, nitrogen content of the plant, and total amount of nitrogen in the plant.View full abstractDownload PDF (1407K) -
Syoko Hashiguchi1968 Volume 18 Issue 6 Pages 346-350
Published: December 31, 1968
Released on J-STAGE: May 16, 2008
JOURNAL FREE ACCESSIn a trait of plant or animal, suppose that phenotypic and genotypic values (random variables Y and X) follow to the bivariate normal density function. Then it becomes a particular normal density function in which covariance of Y and X is the same as the variance of X. The changes of the means, variances and correlations of this particular binormal or multinormal population by the truncation simulating the direct or indirect selection are discussed.View full abstractDownload PDF (595K) -
shigeo Akita, Setsuo Ikemoto, Misao Kusubara, Masashi Kobayashi, Mitsu ...1968 Volume 18 Issue 6 Pages 351-354
Published: December 31, 1968
Released on J-STAGE: May 16, 2008
JOURNAL FREE ACCESSSelection process and main characters of two strains selected for direct planting were described. Chugoku 18 and Chugoku 25, which are different in root type, root size and growth habit, would provide new point of view in the direct planting cultivation of sweet potato.View full abstractDownload PDF (940K)
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