Chromosomal evolution in Malagasy lemurs
作者:
B. Dutrillaux,
Y. Rumpler,
期刊:
Cytogenetic and Genome Research
(Karger Available online 1977)
卷期:
Volume 18,
issue 4
页码: 197-211
ISSN:1424-8581
年代: 1977
DOI:10.1159/000130763
出版商: S. Karger AG
数据来源: Karger
摘要:
The chromosome analysis of meiosis in four lemurs, Lemur fulvus fulvus, L. f. collaris, L. f. albocollaris, and L. macaco, and particular hybrid crosses is reported. In metaphase I, trivalents and chain elements were detected and identified with T-banding. The study largely confirms our previous work on mitotic karyotype comparisons in the genus Lemur. The absence of chain multivalents elements in the pachytene stages of hybrid meiosis, where a chain is detected later in diakinesis, may offer evidence on the possible existence of a two-step pairing mechanism in meiotic homolog pairing. Considerations about the role of the chromosome rearrangements in establishing a gametic barrier in speciation are developed.
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