中国春phlb突变体与多倍体Aegilops杂种F_1回交植株(BC_1F_1)的细胞学研究  

Cytological study of backcross plants Chinese Spring ph1b mutant with different Aegilops by common wheat

作　　者：任贤[1] 张曦燕[1] 韩敬花[2] 樊路[2] 

机构地区：[1]宁夏农业生物技术重点实验室,银川750002 [2]中国农业科学院作物育种栽培研究所,北京100081

出　　处：《西北植物学报》2002年第6期1300-1305,共6页Acta Botanica Boreali-Occidentalia Sinica

基　　金：宁夏自治区"九五"攻关项目

摘　　要：中国春 phlb突变体与 5个多倍体 Aegilops的杂种 F1 用普通小麦进行回交 ,并对回交一代 (BC1 F1 )的细胞学进行了研究。结果表明 ,BC1 F1 植株花粉母细胞最高染色体数 56条 ,最低 35条 ,一般情况下 phlb基因可以增加 BC1 F1 植株的染色体数 (不是所有组合 ) ,但不能增加染色体配对水平。杂种 F1 回交时有效雌配子最高染色体数在含有 phlb基因组合中高于不含 ph1 b基因的组合 ,但最低染色体数目相等 ,且含有 2 1条染色体雌配子最具有竞争力。同时也证明 ,回交的成功并不取决于杂种 F1 通过重建分裂 (restitution division)Cytological behavours of backcross plants Chinese Spring ph1b mutant with 5 polyploid Aegilops by common wheat was studied.The results indicated that the chromosomes number in the BC 1 F 1 plants ranged from 56 at most to 35 at least.In most cases,ph1b gene was advantageous to increase the chromosome number in BC 1 F 1 plants(not in all combinations),but the chromosome pairing in the plants could not be promoted by ph1b gene.The most chromosome number in effective female gametes was more in ph1b combinations than in no ph1b combinations,but the least chromosome number in effective female gametes was nearly equal in the two kinds of combinations.The female gametes with 21 chromosomes intended to be with stronger competitive ability for pollination.Successful backcross didnt depend on the unreduced female gametes from restitution division.

关 键 词：中国春phlb突变体 多倍体Aegilops杂种 F1 回交植株 细胞学研究 普通小麦 染色体配对 雌配子 

分 类 号：S512.1[农业科学—作物学]