流浪蝗自发交换中的交叉分布和着丝粒取向

Canadian journal of genetics and cytology. Journal canadien de genetique et de cytologie Pub Date : 1986-12-01 DOI:10.1139/G86-127

J. Cabrero, J. Camacho

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引用次数: 0

摘要

细胞学检查表明，18只自然种群中的一只雄性迷走Chorthippus迷走Chorthippus vagans在L1和M4染色体之间发生了杂合。研究了交叉在多染色体构型中的分布，以及间段交叉的形成与着丝粒取向的关系。我们的结果证实了之前的观察，邻接-2是最常见的取向，在间隙节段没有交叉。关键词:Chorthippus，互交，间隙节段，交叉分布，取向

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Chiasma distribution and centromere orientation in a spontaneous interchange in the grasshopper Chorthippus vagans

One of 18 Chorthippus vagans males from a natural population was heterozygous for an interchange between the L1 and M4 chromosomes when examined cytologically. Chiasma distribution within multiple chromosome configurations and the relation between chiasma formation in the interstitial segments and centromere orientation were investigated. Our results confirm previous observations that adjacent-2 is the most common orientation in absence of chiasmata on the interstitial segments.Key words: Chorthippus, interchange, interstitial segments, chiasma distribution, orientation.

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Canadian journal of genetics and cytology. Journal canadien de genetique et de cytologie

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