染色体基数为7的两种葱属植物的核型研究

Plant Diversity ›› 1996, Vol. 18 ›› Issue (S8): 1-3.

• 研究论文 •

染色体基数为7的两种葱属植物的核型研究

黄瑞复党承林虞泓

云南大学进化生态学研究实验室

出版日期:1996-12-26 发布日期:1996-12-26

STUDIES ON KARYOTYPES OF TWO SPECIES WITH BASIC CHROMOSOME NUMBER SEVEN

HUANG Rui-Fu DANG Cheng-Lin YU -Hong

Laboratory of Evolutionary Ecology, Yunnan University

Online:1996-12-26 Published:1996-12-26

摘要/Abstract

摘要： 大花韭Allium mactanthum Baker和多星韭(Allium wallichii Kunth及其变种柳叶韭(Allium walichii Kunth var．platyphyllum J.M．Xu)的核型，它们的染色体基数都是人大花韭有倍性变化，出现二倍体和四倍体，核型公式分别为2n=2x=14=10m+4st和2n=4x=28=20m＋8st；最长染色体和最短染色体的长度比分别为3.03和3.00；着丝点端化值分别为60.67％和59.70％；均为2B核型。多星韭也有倍性变化，出现二倍体和四倍体，核型公式分别为2n=2x=14=4m（2SAT）＋10sm和2n=4x=28=12m（2SAT）＋16sm；最长染色体和最短染色体的长度比均为1.60；着丝点端化值分别为62.76％和62.50％；均为2A核型。柳叶韭为二倍体，核型公式为2n=2x=14=4m（2SAT）十10sm；最长染色体和最短染色体的长度比为168；着丝点端化值为63.81％；也是2A核型。

关键词: 大花韭, 多星韭, 柳叶韭, 倍性, 染色体基数

Abstract: The karyotypes of Allium macranthum Baker, Allium wallichi Kunth and its variety Allium wallichi Kunth var. platyphyllum J. M. Xu were investigated. They had the same basic chromosome numbers of x= 7. There were diploid and tetraploid observed in the species Allium macranthum. Their karyotypes could be formulated as 2n=2x= 14= 10m+4st and 2n = 4x = 28 = 20m+8st respectively, belonging to Stebbins/ 2B type. The ratios between longest to shortest chromosome were 3.03 and 3.00 respectively. The centromeric terminalization values were 60.67 and 59.70 respectively. There were also diploid and tetraploid observed in the species Allium wallichii. Their karyotypes could be formulated as 2n= 2x= 14=4m(2SAT)+10sm and 2n=4x=28= 12m(2SAT)-H6sm respectively, belonging to Stebbins/ 2A type.

Key words: Allium macranthum

黄瑞复党承林虞泓. 染色体基数为7的两种葱属植物的核型研究[J]. Plant Diversity, 1996, 18(S8): 1-3.

HUANG Rui-Fu DANG Cheng-Lin YU -Hong. STUDIES ON KARYOTYPES OF TWO SPECIES WITH BASIC CHROMOSOME NUMBER SEVEN[J]. Plant Diversity, 1996, 18(S8): 1-3.

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染色体基数为7的两种葱属植物的核型研究

STUDIES ON KARYOTYPES OF TWO SPECIES WITH BASIC CHROMOSOME NUMBER SEVEN

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