摘要
应用２个熟性小豆材料（京农２号：红粒，绿茎；Ｓ＿（５０３３）：红底色黑斑花纹，淡紧茎）进行正反交组配，对获得的Ｆ＿１、Ｆ＿２、Ｆ＿３及Ｆ＿４代植株调查结果表明：（１）茎色：基本色泽基因紫茎（Ａ）为显性，绿茎（ａ）为隐性，Ｆ＿２代为３紫茎：１绿茎分离，属一对等位基因控制。控制茎色浓淡还有一显性色彩减弱基因（Ｈ），当Ｈ存在时，基本色泽紫茎Ａ表现减弱，呈淡紫色（Ａ－Ｈ－），其Ｆ＿２分离比例３（淡紫茎）：１（深紫茎）。在Ｆ＿２、Ｆ＿３的分离株系（Ｆ＿３、Ｆ＿４世代植株）中，紫、绿茎植株分离比仅为１．５８～１．８５：１，不呈３：１，绿株的出苗、成活、生长均呈优势，且紫茎株系中似有部分致死的基因存在；（２）粒色：花粒基因（Ｆ）对红粒基因（ｆ）为显性，Ｆ＿２呈３（花粒）：１（红粒）分离，属一对等位基因控制，但在花粒上还有花斑大小、深浅分离现象；（３）同一世代控制茎色的基因与种皮色基因具有完全连锁关系，但上代籽粒色并不能完全决定下代植株的茎色。
Abstract Two adzuki bean varieties with different maturity trait(Jing nong No. 2:red seed,green stem;S(5033):black spot figured red seed,light purple stem.)were crossed.Results foomF1,F2,F3 and F4 population showed that:(1)The colour of stem:Purple stem(A)that has ba-sic lustrous gene is dominance,but green stem (a)is recessive. The segregation ratio of purpleand green stem in F2 generation is 3:1.Which means the colour is controlled by a couple of al-lele. There is another dominant weak gene(H) which controls the shade of the stem colour.Purple stem(A)appers light purple (A-H-) when H gene exlsts. The segregation ratio of lightand dark purple stem in F2 generation is 3:1.In the Segregating plant populations of F2,F3(F3,F4 generation),the segregation ratio of purple and green stem is only 1.58～1.85:1,not3:1.the seedling,surivival and growth of the green stem plant is better than that of the pur-ple plant,moreover there may be partial lethal gene in purple stem plants(2)
出处
《北京农学院学报》
1996年第2期1-6,共6页
Journal of Beijing University of Agriculture
基金
北京市自然科学基金
北京市科委资助
