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INCIPIENT SEX-CHROMOSOME DIFFERENTIATION IN AN ISOPOD CRUSTACEAN SPECIES, ASELLUS-AQUATICUS

被引：20
作者：
ROCCHI, A
PRANTERA, G
LANZA, V
DICASTRO, M
机构：
[1] UNIV ROME, DIPARTIMENTO GENET & BIOL MOLEC, I-00185 ROME, ITALY
[2] CNR, CTR GENET EVOLUZ, ROME, ITALY
来源：
CHROMOSOMA | 1984年 / 89卷 / 03期
关键词：
D O I：
10.1007/BF00294998
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
A. aquaticus, a sexually dimorphic isopod crustacean, has no morphologically distinguishable sex chromosome pair. In 25% of the males from a natural population the fluorochrome chromomycin A3 revealed a pair of metacentric chromosomes that was heteromorphic for 2 heterochromatic areas. One chromosome had a fluorescent band in each of the 2 arms, whereas the other chromosome lacked both bands. Chromosomal analysis was perfomred on 50 sibships produced by known parents. The heterochromosome was inherited only by the male offspring of males bearing it. Its distribution led us to postulate the existence of an incipient differentiating sex chromosome pair in the A. aquaticus population.
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页码：193 / 196
页数：4
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