Variation of major characters in soybean varieties, 2; Effects of day length.
1990
Lee S.C. | Kim J.H. | Choi K.G. | Chang Y.N.
These experiments were conducted to investigate the effect of day length on some characteristics and seed weight in the soybean cultivars. Those were classified into three types of seed weight with delaying seeding date in the previous paper. Flowering was delayed as the longer day length was employed. When the length became longer, the number of leaves at flowering, length of main stem and the number of nodes at maturity greatly increased. The seed weight decreased when the day length was longer than 14 hours. Negative correlation was obtained between seed weight and day length. There was negative correlation between seed weight and the number of days required to flowering, and length of main stem and the number of nodes at maturity. Type I cultivars decreased in seed weight when the day length was longer than 16 hours, but this trend was found to be clear with type II cultivars. Type III cultivars decreased in seed weight with increasing the day length.
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