Estimation of Genetic Parameters and Selection of Soybean (Glycine max. L. Merril) Lines Derived from Single Seed Descent (SSD) Method for Low Light Intensity Tolerance

Abstract

This research was designed to estimate genetic parameters and 10 gel inbreed lines low light intensity tolerance in soybean by using single seed design (SSD) based on agronomic character and tolerance index. RILs F6 derived from hybridization between Ceneng and Godek were used in this research. The research reveal that low light intensity stress giving effect in decreasing in flowering ability, number of productive branch, number of productive pod, number of productive pod, and yield. In addition, low light intensity treatment made the stem has abnormal elongation. increasing in number of empty pod, and 100 grain weight. Under low light intensity, yield productivity decrease until 32.42% than control ( full light intensity). The highest yield productivity under low light intensity condition was 1.74 ton/ ha. While in under control condition, yield productivity can be 2.62 ton/ha. Genetic variability was observed by using combined analysis of variance. Light intensity and genotipes treatment was significant effect in all observed characters. The highest genetic variance was in plant height character, but in number of productive pod was the highest phenotipe variance, environmental variance and also G x E interact ion variance. Number of heritability in plant height, empty pod, and 100 grain weight were included high criteria of heritability number of productive branch, productive node, and pod productive were included medium criteria. While in diameter stem and weight grain/ plant character were included low criteria. Index tolerant and relative value method was used 10 select genotypes which have low light intensity tolerance trait. 20 genotypes which has low light intensity tolerance trait were selected by using both methods. Means value of productivity by index tolerance is 1.37 ton/ha and by relative value is 1.31 ton/ha. In our research we got productivity value reach out 2.62 ton/ha from control condition.