Inheritance of Vitamin E Contents in Soybean RIL Population BIEX

Breeding for high vitamin E contents in soybeans is highly concerned recently. The objective of the present study was aimed at revealing the genetic system of vitamin E contents with a recombinant inbred line for the traits improvement in 2008 and 2009 years. Genetic mechanism of vitamin E composition contents in soybean was performed under major gene plus polygene mixed inheritance model in the RIL population of BIEX consisting of 208 families derived from the cross Essex × ZDD2315. The results showed that α-tocopherol,γ-tocopherol and total tocopherol contents of the cross were controlled by two major genes plus polygenes,with the major gene heritability of59. 62%,75. 99% and 77. 05%,respectively,and polygene heritability of 35. 90%,13. 96% and 15. 05%,respectively. δ-tocopherol content of the cross was controlled by one major gene plus polygenes,with the major gene heritability of 50. 39%,and the polygene heritability of 38. 11%. The inheritance of vitamin E composition contents in soybean involved with both major genes and polygenes while the major genes with their heritability of more than50% and the polygene heritability of more than 10%. From described above,it was inferred that breeders for vitamin E contents should pay attention to both main genes and polygenes.