THE BALANCED LETHAL SYSTEM OF CRESTED NEWTS
THE BALANCED LETHAL SYSTEM OF CRESTED NEWTS
复制标题
DOI：
10.1038/hdy.1994.96
复制
发表时间：
1994-07-01
期刊：
影响因子：
3.8
通讯作者：
WALLACE, H
中科院分区：
文献类型：
--
作者：
WALLACE, H
交配的Triturus cristatus carnifex始终产生两种胚胎致死表型（肥尾和细尾）和可行的幼虫在1：1：2的比例预期的一个平衡的致死系统。1号染色体的标记变异表明，肥尾胚胎为1A/1A纯合子，细尾胚胎为1B/1B纯合子，存活胚胎为1A/1B杂合子。另一个胚胎性状（背水泡），这是在一些交配的致死表型中表达，被发现是不完全连锁的隐性致死因素。
Matings of Triturus cristatus carnifex consistently produce two embryonic lethal phenotypes (fat-tailed and slim-tailed) and viable larvae in the 1:1:2 proportions expected for a balanced lethal system. A marker variant of chromosome 1 is used to show fat-tailed embryos are 1A/1A homozygotes, slim-tailed embryos are 1B/1B homozygotes and viable ones are 1A/1B heterozygotes. Another embryonic trait (dorsal blisters), which is expressed in the lethal phenotypes of some matings, is found to be incompletely linked to the recessive lethal factors.