同源四倍体黑麦中相同和同源染色体的配对竞争。 I. 亚中部着丝粒染色体。
Pairing Competition between Identical and Homologous Chromosomes in Autotetraploid Rye. I. Submetacentric Chromosomes.
机构信息
Departemento de Genética, Facultad de Biología, Universidad Complutense, 28040 Madrid, Spain.
出版信息
Genetics. 1985 Dec;111(4):933-44. doi: 10.1093/genetics/111.4.933.
Meiotic pairing preferences between identical and homologous but not identical chromosomes were analyzed in ten induced tetraploid/diploid chimaeral rye plants (Secale cereale) heterozygous for telomeric heerochromatin C-bands in both arms of chromosome 1R. These plants were the progeny of two crosses between only one plant of cv. Petkus, used as male, and two plants of the inbred lines E and R, respectively. Different pairing preferences for chromosome 1R were found: (1) between plants, (2) between chromosome arms within the same plant and (3) between bivalents and multivalents within the same plant. The possible influence in the preferences of several factors such as differences in C-heterochromatin content in the chromosomes analyzed, specific genetic control and independence in pairing behavior between both arms and partner exchange is discussed.
在十个诱导的四倍体/二倍体杂种黑麦（Secale cereale）植物中分析了相同和同源但不相同染色体之间的减数分裂配对偏好，这些植物是仅使用 cv. Petkus 作为雄性的一个植物与两个自交系 E 和 R 之间的两次杂交的后代。在 1R 染色体上发现了不同的配对偏好：（1）在植物之间，（2）在同一植物内的染色体臂之间，以及（3）在同一植物内的二价体和多价体之间。讨论了几种因素对偏好的可能影响，如分析的染色体中 C-异染色质含量的差异、特定的遗传控制以及两个臂和伙伴交换之间配对行为的独立性。
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