Absence of strong heterosis for life span and other life history traits in Caenorhabditis elegans.
Absence of strong heterosis for life span and other life history traits in Caenorhabditis elegans.
复制标题
秀丽隐杆线虫的寿命和其他生活史特征不存在强杂种优势。
DOI：
10.1093/genetics/134.2.465
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发表时间：
1993
期刊：
影响因子：
3.3
通讯作者：
Hutchinson,EW
中科院分区：
文献类型：
--
作者：
Johnson,TE;Hutchinson,EW
我们检查了秀丽隐杆线虫野生型品系之间的杂交，以了解杂种优势对寿命和其他生活史性状的影响。所有野生品系的雌雄同体的预期寿命相似，但两个品系的雄性比雌雄同体的寿命短，而另外两个品系的雄性比雌雄同体的寿命长。 F1 雌雄同体后代没有表现出杂种优势，而在 F1 雄性中检测到一些更长寿命的杂种优势。对两种广泛研究的野生型品系 N2（Bristol 变种）和 Berg BO（Bergerac 变种）之间杂交的 F1 杂种进行了发育速率、雌雄同体育性和行为的检查；这些生活史性状不存在杂种优势。受控的温度变化和不受控制的环境变化都会影响所有基因型的寿命长度。在 N2 和 Berg BO 雌雄同体、或 N2 雌雄同体和雄性、或 N2 和 Ts 突变株 (DH26) 的比较中，观察到 G x E 对寿命的显着影响。然而，在实验中，环境变化很小，寿命也相当可复制。
We have examined crosses between wild-type strains of Caenorhabditis elegans for heterosis effects on life span and other life history traits. Hermaphrodites of all wild strains had similar life expectancies but males of two strains had shorter life spans than hermaphrodites while males of two other strains lived longer than hermaphrodites. F1 hermaphrodite progeny showed no heterosis while some heterosis for longer life span was detected in F1 males. F1 hybrids of crosses between two widely studied wild-type strains, N2 (var. Bristol) and Berg BO (var. Bergerac), were examined for rate of development, hermaphrodite fertility, and behavior; there was no heterosis for these life history traits. Both controlled variation of temperature and uncontrolled environmental variation affected the length of life of all genotypes. Significant G x E effects on life span were observed in comparisons of N2 and Berg BO hermaphrodites, or N2 hermaphrodites and males, or N2 and a Ts mutant strain (DH26). Nevertheless, within an experiment, environmental variation was minimal and life spans were quite replicable.