摘要
为探讨阿拉善鹅观草 ( R.alashanica( Keng) S.L.Chen)的染色体组组成 ,进行了大鹅观草 ( R.grandisKeng( 2 n=2 4 ,St St YY) )和阿拉善鹅观草种间杂交 ,对这两个种及其杂种 F1的形态学、繁育学和减数分裂染色体配对行为进行了研究。结果表明 :杂种 F1的形态特征介于父母本之间 ,其花粉母细胞减数分裂染色体平均构型为 :2 0 .4 0 +3.6 9 +0 .0 9 +0 .0 4 。表明阿拉善鹅观草含有一个修饰的 St基因组 ,即 Sta。
Interspecific hybridization was carried out between Roegneria alashanica (Keng) S. L. Chen and R. grandis Keng (2n=24. StStYY). The morphology, fertility and chromosome pairing behavior in meiosis of the parents and their hybrid F 1 were studied to determine the genomic constitution of R. alashanica. The F 1 hybrid appeared intermadiate between the two parents. The meiotic configuration of the hybrid was 20.40Ⅰ+3.69Ⅱ+0.09Ⅲ+0.04Ⅳ. The results indicated that R. alashanica has one slightly modified St genome, be designated as Sta.
出处
《广西植物》
CAS
CSCD
北大核心
2002年第4期352-356,T004,共6页
Guihaia
基金
教育部骨干教师资助项目教技司 [2 0 0 0 ]6 3号
