Inheritance of earliness of maturity in soybean, Glycine max (L.) Merrill
1949
Singh, M.P. | Anderson, J.C.
This experiment was designed to study the inheritance of maturity in soybeans. F2 and F3 generations of six different crosses were used. In the F3 of three crosses two different dates of planting were used to study the effect of the variation in the photoperiod. From the data obtained the following generalizations regarding inheritance of maturity were drawn: (1) There is evidence that the maturity of soybeans is influenced by a few major and a number of minor genes. (2) The transgressive segregation toward lateness obtained in F3 of most of these crosses may be due to the influence of complementary genes for lateness contributed from both the parents. (3) The method involving comparison of the obtained mean of a given generation with the predicted arithmetic and geometric means calculated from the obtained parental means and also the calculation of skewness of F2 measurements were of little value, as regards these data, in determining whether the interactions of these genes were geometrically or arithmetically cumulative. (4) The comparison of parental and F2 means showed that in some cases earliness seemed to be dominant, in others recessive, and in some there was no dominance. (5) With late planting there was a decrease in the time taken to maturity in all three crosses studied. The differential behavior of the early and late selections on the two different dates of planting was explained on the basis of interaction between the photoperiod and temperature.
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