Achiasmatic male meiosis in two species of Saldula (Saldidae, Hemiptera)
作者： SEPPO NOKKALA , CHRISTINA NOKKALA
DOI: 10.1111/J.1601-5223.1983.TB00737.X
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摘要: Male meiosis in two species of Saldula, S. orthothila and saltatoria was studied. The diploid chromosome numbers were found to be 2n=32+m+XY 2n=32+2m+XO respectively. existence a Y-chromosome recorded for the first time this primitive heteropteran genus. meiotic behaviour sex chromosomes similar that more advanced Heteroptera. Autosomal bivalents during late prophase metaphase I consisted parallelly aligned chromosomes. No traces chiasmata could found. role evolution systems Heteroptera, mechanisms behind regular segregation achiasmatic chromosomes, adaptive significance restriction heterogametic are discussed.
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