苏丹草与拟高粱远缘杂交初报  

Study on Sorghum sudanese × S.propinguum interspecies hybridization

作　　者：钟小仙[1] 顾洪如[1] 丁成龙[1] 白淑娟[1] 向阳海[2] 刘朝晖[2] 

机构地区：[1]江苏省农业科学院土壤肥料研究所,南京210014 [2]江苏省农业科学院遗传生理研究所,南京210014

出　　处：《草地学报》2002年第1期24-27,共4页Acta Agrestia Sinica

基　　金：江苏省自然科学基金项目 (BK2 0 0 1176)

摘　　要：通过苏丹草与拟高梁杂交 ,获得了远缘杂种 F1 代 ,远缘杂交成功率 1%左右 ,F1 种子的发芽率约 2 0 %。F1 花粉母细胞减数分裂中期染色体镜检为 10个二价体 ,染色体配对正常。采用 RAPD分子标记技术对 F1 真假杂交种进行快速鉴定 ,提高了育种效率。杂种 F1 代大田表现对叶斑病轻感 ,F2 代田间表现明显的抗 /感分离 。Interspecies hybrids(F 1)were obtained by distant crossing between S.sudangrass (Piper) Stapf.and S.propinguum (Kunth) Hifehe. The successful probability of hybridization is about 1% and germination of seed is 20% or so. It was observed ten bivalents chromosomes according to a microspore mother cell of F 1 at metaphase I during meiosis. The chromosome comparison of F 1 is normal. It will be increased the efficiency of breeding by using PAPD technique, which is applied to identified true or false of F 1. Interspecies F 1 plant is low infected leaf spot disease and resistant plant presented in F 2. It was supplied a probability for leaf spot resistant breeding.

关 键 词：苏丹草 拟高粱 远缘杂交 抗叶斑病 育种 抗病性 牧草 

分 类 号：S544.1[农业科学—作物学]