虹鳟、溪鳟及其杂种的银带核型：源自溪鳟的银染核仁组织区在异源三倍体中消失。

Silver-banded karyotypes of the rainbow trout and the brook trout and their hybrids: disappearance in allotriploids of Ag-NORs originated from the brook trout.

作者信息

Ueda T, Sato R, Kobayashi J

机构信息

Department of Biology, Faculty of Education, Utsunomiya University.

出版信息

Jpn J Genet. 1988 Jun;63(3):219-26. doi: 10.1266/jjg.63.219.

DOI:10.1266/jjg.63.219

PMID:3273766

Abstract

Silver-banded karyotypes of the rainbow trout Salmo gairdneri, the brook trout Salvelinus fontinalis, and their hybrids were described. Diploid-type and triploid-type hybrids were obtained. Triploid-type hybrids had two maternal genomes of the rainbow trout and one paternal genome of the brook trout. The rainbow trout had one pair of M or SM with Ag-NORs near the satellite. In the brook trout, Ag-NORs were observed in four pairs of chromosomes, but each cell had different number of chromosomes with Ag-NORs. In all observed cells of triploid-type hybrids, Ag-NORs originated from the brook trout were not recognized, whereas those from the rainbow trout were found.

摘要

描述了虹鳟（Salmo gairdneri）、溪鳟（Salvelinus fontinalis）及其杂种的银带核型。获得了二倍体型和三倍体型杂种。三倍体型杂种具有两个虹鳟的母本基因组和一个溪鳟的父本基因组。虹鳟有一对M或SM染色体，其银染核仁组织区（Ag-NORs）靠近随体。在溪鳟中，在四对染色体上观察到了Ag-NORs，但每个细胞中具有Ag-NORs的染色体数量不同。在所有观察到的三倍体型杂种细胞中，未识别出来自溪鳟的Ag-NORs，而发现了来自虹鳟的Ag-NORs。