用吉姆萨 C 带技术研究同源四倍体冰草×硬粒小麦杂种的减数分裂配对。

Meiotic pairing of the amphiploid Hordeum chilense X Triticum turgidum conv. durum studied by means of Giemsa C-banding technique.

机构信息

Department of Genetics, Faculty of Sciences, University of Alcalá de Henares, Madrid, Spain.

出版信息

Theor Appl Genet. 1985 Apr;70(1):85-91. doi: 10.1007/BF00264487.

Abstract

The meiotic behaviour of the amphiploid Hordeum chilense X Triticum turgidum conv. durum using a C-banding staining method is studied. Nine pairs of chromosomes at metaphase-1 (4A, 7A and the seven of the B genome) were identified and the remaining wheat chromosomes (1A, 2A, 3A, 5A and 6A) and seven of the chilense (1 to 7 H (ch) chromosomes) were assigned to its particular genome. A similar mean number of univalents from parental genomes (wheat and wild barley) were found. No meiotic pairing between chilense and turgidum chromosomes was detected. Differences in the meiotic behaviour per chromosome and amongst genomes are explained on the basis of cytomorphological and heterochromatin characteristics.

摘要

用 C-带染色法研究了杂种 Hordeum chilense X Triticum turgidum conv. durum 的减数分裂行为。在中期-1 鉴定出 9 对染色体（4A、7A 和 B 基因组的七对），其余的小麦染色体（1A、2A、3A、5A 和 6A）和 chilense 的 7 对（1 到 7 H(ch) 染色体）被分配到其特定的基因组。从亲本基因组（小麦和野生大麦）中发现了类似的单价体平均数。没有检测到 chilense 和 turgidum 染色体之间的减数分裂配对。根据细胞形态学和异染色质特征，解释了每条染色体和基因组之间减数分裂行为的差异。