NDLI: Absence of Strong Heterosis for Life Span and Other Life History Traits in Caenorhabditis Elegans

Content Provider	PubMed Central
Author	Johnson, T. E. Hutchinson, E. W.
Abstract	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. F(1) hermaphrodite progeny showed no heterosis while some heterosis for longer life span was detected in F(1) males. F(1) 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.
Starting Page	465
File Format	PDF
ISSN	00166731
Journal	Genetics
Issue Number	2
Volume Number	134
Language	English
Publisher Date	1993-06-01
Access Restriction	Open
Subject Keyword	Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Genetics

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Absence of Strong Heterosis for Life Span and Other Life History Traits in Caenorhabditis Elegans