论文部分内容阅读
本文通过对大豆F_1代组合、F_2、F_3代籽粒兰脐分离系统的单株籽粒脐色的调查,所得数字进行了适合性测定,得出大豆兰脐性状产生的原因及其分离规律。控制白花亲本籽粒脐色的基因有带与不带R基因之分。带R基因的白花亲本与紫花亲本杂交,F_1代籽粒出现兰脐,其基因型为I—R—W_1—tt,不带R基因的白花亲本与紫花亲本杂交,F_1代籽粒为无色脐,基因型为I—rrW_1—tt。F_1代籽粒兰脐性状的出现,不受亲本紫、白花正反交组合方式的影响。兰脐性状受多对基因控制,F_2代籽粒脐色分离符合独立分配规律。当控制脐色的基因有两对相差时(R、r,W_1、w_1)兰脐与无色脐之比为9:7。
In this paper, we investigated the umbilical cord color of F_1 generation of F_1 generation and F_2 generation of umbilical cord of F_2 generation by Soybean, and analyzed the reason for the occurrence of Umbilical character of Soybean and its separation rules. The genes that control the umbilicus of the white-colored parental grain are divided into zones with and without the R gene. The white flower parents with R gene were crossed with the purple flower parents. The F_1 seeds appeared blue umbilical and the genotype was I-R-W_1-tt. The white flower parents without R gene were crossed with the purple flower parents, The genotype was I-rrW_1-tt. F_1 generation of grain umbilical traits appear, not from the parent purple, white flower reciprocal cross combination of the impact. The characters of blue umbilical cord were controlled by many genes. The umbilical color separation of F2 seeds accorded with the independent distribution rule. When there are two pairs of genes that control the umbilical color (R, r, W_1, w_1), the ratio of umbilicus to umbilicus is 9: 7.