三元杂种[A_2A_2G_1G_1]×[A_2×(AD)_1]的形态及核型分析  

Morphology and Karyotype Analysis of the Newly Formed Trispecific hybrid [A_2 A_2 G_1 G_1]×[A_2×(AD)_1] Cotton Species

作　　者：胡建斌[1] 

机构地区：[1]山西农业大学农学院,山西太谷030801

出　　处：《山西农业大学学报（自然科学版）》2005年第3期217-219,共3页Journal of Shanxi Agricultural University(Natural Science Edition)

摘　　要：在对亚比棉异源四倍体[A2A2G1G1]研究的基础上,对亲本[A2×(AD)1]和三元杂种[A2A2G1G1]×[A2×(AD)1]进行了形态学和核型分析。形态学分析表明:在23个性状当中,有26.1%的性状趋向于母本,有13.1%的性状趋向于父本,21.7%的性状为与父母本相同的性状,13.1%的性状表现为中间性状,26.0%的性状表现为超亲性状。核型分析表明:异源多倍体[A2×(AD)1]体细胞染色体数目为2n=4x=52,核型公式为2n=4x=52=50(2SAT)+2sm属1B型;三元杂种[A2A2G1G1]×[A2×(AD)1]体细胞染色体数目为2n=4x=52,核型公式为2n=4x=52=40m(4SAT)+12sm(2SAT)属2A型。Morphological character and karyotype analysis of parents and Trispecific hybrid [A_ 2 A_ 2 G_ 1 G_ 1 ] were studied on the base of allotetraploid [A_ 2 A_ 2 G_ 1 G_ 1 ] comparison.The morphology analysis showed that among the 23 traits,there were 26.1 percent of traits tended to female parent,13.1 percent of traits tended to male both parent,21.7 percent of traits were the same with both parents,13.1 percent of traits showed middle traits,26.0 percent of traits showed superior to its parents.The analysis of karyotype demonstrated that the chromosome number of somatic cells of allopolyploid was 2n=4x=52,the karyotype formula was 2n=4x=52=50(2SAT)+2sm,belonging to '1B'type;the chromosome number of somatic cells of Trispecific hybrid [A_ 2 A_ 2 G_ 1 G_ 1 ] was 2n=4x=52, the karyotype formula was 2n=4x=52=40m(4SAT)+12sm(2SAT),belonging to '2A'type.

关 键 词：三元杂种 形态特征 核型分析 

分 类 号：Q813.4[生物学—生物工程]