彭泽鲫两个雌核发育克隆的染色体组型分析

采用PHA和秋水仙素体内注射法直接制作肾细胞染色体标本，对彭泽鲫种群内两个不同雌核发育克隆的亲本进行染色体数目及组型分析。结果表明，彭泽鲫种群内的两个不同克隆存在染色体数目及组型差异，其中克隆H包含6条超数染色体在内的染色体众数是156，150条基本染色体的组型公式为：42M 36SM 39ST 33T，NF=228；克隆L包含12条超数染色体在内的染色体众数是162，150条基本染色体的组型公式为：36M 45SM 33ST 36T，NF=231。两个不同雌核发育克隆的发现及其染色体的差异说明彭泽鲫种群内同样存在着类似银鲫种群内的遗传多样性。

Karyotypic Analysis from Two Clones of Gynogenetic Pengze Crucian Carp(Carassius auratus of pengze)

Pengze crucian carp (Carassius auratus of pengze),one of the most popular cultural fishes in China,is an endemic bisexual population with natural gynogenetic reproduction mode. Just like Silver crucian carp,investigation on the karyotype of Pengze crucian carp is important to understanding the diversity and the evolution of the unisexual vertebrates. Two distinguishable gynogenetic clones of Pengze crucian carp,named clone H and clone L,respectively,were detected recently. In this study,the chromosomes number and karyotype of the two clones were analyzed using chromosomes of kidney cell-PHA culture in vivo prepared by flame-drying technique. The results show that the chromosome numbers and karyotypes of the two clones are different. Clone H has 156 chromosomes in its karyotype with 42 metacentric,36 submetacentric,39 subtelocentric,33 telocentric,and six supernumerary chromosomes; the karyotype of clone L contains 162 chromosomes with 36 metacentric,45 submetacentric,33 subtelocentric,36 telocentric,and twelve supernumerary chromosomes. The karyotype formula of 150 basic chromosomes of clone H is 3n=42M 36SM 39ST 33T,NF=228;and the karyotype formula of 150 basic chromosomes of clone L is 3n= 36M 45SM 33ST 36T,NF=231. The discovery of the two different gynogenetic clones indicates that the genetic diversity also exists in the Pengze crucian carp,similar to that in the Silver crucian carp.