トウキビ自殖系並にその単交配に於ける穀粒の胚・胚乳比とF_1穀粒の変量分析

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An attem,pt has been m,ade to analyse the variance 'of grain yield on Fl plant and of endosperm-germ ratio in 24 inbred lines and its hybrids in maize. The following conclusions were obtained from the data obtained. 1 ) . The increase of endosperm-germ ratio through fertilization by forelgn pollen was recognized pnly in ~ few special - inbred lines, and not signifieant in m,ost of them... 2). In the both cases, grain yield on Fl plant and endosderm-germ ratio, it may be assum.,ed that the heterosis should be appeared as a result of the. cum,ulative action of any two giveh alleles among genes of a m,ultiple allelomorphic series as suggested already by East (1936). 3). There seems ta be a barely significant correlation (r=0. 3) between the increases of endosperrD.-gerrc' ratio and of tlle abiliヴy of grain-yieldihg in hybred strain, bec~use of the existence of a com,mon regres-sion within all of inbred lines. 4-). A fact that any one of inbred lines differes si*anificantly from the another on the am,ount of re-gression in the grain yield on F, plant and the endo-sperm,*germ ratio may be demonstrated as a result of possible combination between two independent factors, one for the a*fain yield and another for the endosperm-germ, rati.o. 5). The cause that the prediction of grain yielding ability for each inbred line by meahs of the lri:easure-ment on F1 plant of specific grain characters such ~s endosperm,-gorm ratio is in difficulty, was discussed
1952-03-31

トウキビ自殖系並にその単交配に於ける穀粒の胚・胚乳比とF_1穀粒の変量分析

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