Banaszek A, Fedyk S, Szalaj K A, Ch&ecedil;tnicki W
Institute of Biology, University of Bialystok, Poland.
Heredity (Edinb). 2000 May;84 ( Pt 5):570-7. doi: 10.1046/j.1365-2540.2000.00701.x.
Spermatogenesis was studied in 56 shrews (Sorex araneus L.) from two chromosomal hybrid zones in Poland. The hybrid zones were formed between chromosome races that differed in Robertsonian metacentrics. Shrews were compared in four classes: homozygotes, simple Robertsonian heterozygotes, complex heterozygotes forming four-element rings in meiosis I, and complex heterozygotes forming four- or five-element chains. There was a significant effect of karyotype on the level of germ-cell death and chain-forming complex heterozygotes suffered the greatest germ-cell loss. However, the estimated level of germ-cell death is probably insufficient to influence the fertility of these males.
对来自波兰两个染色体杂交区域的56只鼩鼱（Sorex araneus L.）的精子发生进行了研究。杂交区域是在罗伯逊中着丝粒不同的染色体族之间形成的。鼩鼱被分为四类进行比较：纯合子、简单罗伯逊杂合子、在减数分裂I中形成四元素环的复杂杂合子以及形成四元素或五元素链的复杂杂合子。核型对生殖细胞死亡水平有显著影响，形成链的复杂杂合子生殖细胞损失最大。然而，估计的生殖细胞死亡水平可能不足以影响这些雄性的生育能力。
