COMPLEMENTARY FACTORS FOR HEIGHT INHERITANCE IN BÅRLEY

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Plant height inheritance is reported for three crosses between short-stemmed barley varieties. So far as possible, the parent, varieties, F1, and F2 generations were grown during the same season in such a manner as to reduce to a minimum the effect of environment on plant height. Height measurements were made on the parents, as well as on the progenies of crosses, grown under comparable field conditions in 1950, 1951, and 1953.Two complementary factor pairs appear to control plant height in two crosses that involve short or semi-brachytic varieties, viz., Baitori No. 10×Brachytic No. 119, and Katano×Brachytic No. 119. Transgressive segregation for plant height was observed in the F1 and F2 generations in each case. The plant types recovered in the field included those of normal (tall) height and the parental forms. Based on the assumption of a lethal or semi-lethal double recessive or double dwarf class, the F2 data afforded a good fit to a calculated 9:6:0 or 9:3:3:0 ratio. One family of the Baitori No. 10×Brachytic No. 119 cross was grown in the F3 generation in order to verify the F2 genotypes. The data afforded a poor fit to a calculated 1:4:4:6:0 ratio, because of too many plants in the homozygous tall class. With the exception of the double dwarf class, all expected classes were obtained. The existence of the postulated double dwarf class was verified in another F2 family of the same cross grown in the greenhouse. The data for these crosses indicate the action of two independent gene pairs with complementary effects on plant height, with each parent dominant for one height factor but recessive for the other.It is suggested that tall versus short (Uzuz) and non-brachytic versus brachytic (Brbr) were the two gene pairs involved in this study. Testers were not available to verify the presence of the uz gene.
日本遺伝学会の論文

COMPLEMENTARY FACTORS FOR HEIGHT INHERITANCE IN BÅRLEY

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