王葱の採種に関する研究 : II. 母本の遺伝的相関

概要

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Phenotypic and genotypic corrletaion coefficients among five characters in onion were estimated from the data obtained in 1953 and 1956. Genotypic correlation coefficients were calculated by the formula which was presented by Hazel in 1943. In phenotypic correlation, the coefficients between height/diameter ratio of bulb and weight of bulb was significantly high, but in genotypic corrletion, the correspondent coefficient was non-significant. On the contrary, the coefficients between stem length and height/diameter ratio, stem length and diameter of neck of bulb, and height/diameter ratio and diameter of neck, were significant in phenotypic, but non-significant in genotypic. It may be concluded that the selection based on date of lodging result in modifying of frequency of genes which govern stem length and diameter of neck. And through modifying of frequency of those genes, shape of bulb will be modified in later generation, too. Consequently, to maintain the bulb in constant shape, it is necessary to select the parental bulbs within the bulbs which have limited stem length. To discard the parental bulbs with low height/diameter ratio, it will yield the population which is favourable to storage.
神戸大学の論文