摘要
对昆明地区滇韭的 8个当地居群开展了形态及核型研究 ,并对形态及染色体性状进行了巢式方差分析。结果表明 :滇韭的形态性状在居群内具丰富多态性 ,在居群间具明显多型性 ;核型较对称 ,存在两种倍性的分化 :梁王山居群为二倍体 (2x) ,昆明居群为四倍体(4x)。二倍体核型公式为K (2n ) =2x =16 =14m +2sm ,四倍体核型公式为K (2n ) =4x =32=2 8m +4sm。滇韭的染色体因存在倍性变化、B -染色体形态和数目变化及随体染色体的形态和大小变化而具有一定程度的多态性。
The morphological and karyotipical variations of 8 local populations of Allium mairei Lévl.in Kunming area had been studied in this paper.The results showed that morphological characters of A.mairei have abundant polymorphism in populations and obvious polytypism among populations,and the karyotype of A.mairei is rather symmetry in Sect.Rhiziridium.Diploid and Tetraploid populations were found in A.mairei.The karyotypical formulae of diploid is 2n=2x=14m+2sm,and that of tetraploid is 2n=4x=28m+4sm.There is karyotypical polymorphism in A.mairei because of the variations of polyploids,B-chromosomes and satellite chromosomes.
出处
《云南植物研究》
CSCD
北大核心
2004年第5期529-536,共8页
Acta Botanica Yunnanica
基金
云南省九五科技攻关项目 (95A - 5 )资助
云南大学植物学博士点基金资助
云南大学省级生物技术人才培养基地项目资助
关键词
昆明地区
滇韭
核型
染色体
多态性
百合科
Allium mairei
Karyotype
Polymorphism
Diploid
Tetraploid
B-chromosome
