小豆粒色性状遗传的分析

Genetic Analysis on Seed Coat Color in Adzuki Bean(Vigna angularis)

[目的]研究小豆粒色遗传规律,能有效地通过育种途径来提高小豆商品品质。[方法]选用红色、黑色和红底黑斑籽粒颜色的小豆种质资源,组配了2个杂交组合,分析其F2和F3群体粒色性状遗传。[结果]AG118×GM285组合的F2群体粒色分离比是黑粒∶米黄粒∶红粒=12∶3∶1,F3进一步验证了F2粒色分离比,黑粒色对米黄为显性,米黄对红色为显性,且黑色对米黄色具显性上位性作用。GM276×GM633组合的F2群体粒色分离比是红底黑斑粒∶红粒=3∶1,说明红底黑斑和红粒色由一对基因控制,红底黑斑为显性,红粒色由隐性基因控制。[结论]该研究可为进一步探讨小豆粒色遗传规律提供依据,从而提高小豆商品品质。

[Objective] Studying genetic regularity of seed coat color could improve effectively commercial trait of adzuki bean by breeding. [Method] The inheritance of red, black and red with black spot seed coat color in F： and F3 segregating population that derived from crossing between adzuki bean germplasm resources with black, red and black spot seed coat color was analyzed. [ Result] The black seed coat color was dominant to the cream-colored seed coat color, the eream-eoloured seed coat color was dominant to the red seed coat color, while the black seed coat color was dominant epistasis to the cream-colored seed coat color because segregation ratio of AG118 x GM285 F2 population was black seed coat： cream-colored seed coat color： red seed coat color 12：3：1. F3 population had proved the validity of the above conclusion. Red with black spot seed coat color was dominant to the red seed coat color, and red seed coat was controlled by a recessive gene because segregation ratio of GM276 × GM633 F2 population was black spot seed coat： red seed coat color 3：1. [ Conclusion ] The study could provide the basis for further exploration of genetic regularity of adzuki bean and the improvement of commercial trait of adzuki bean.