期刊
GENETICS
卷 180, 期 1, 页码 567-582出版社
GENETICS SOCIETY AMERICA
DOI: 10.1534/genetics.108.088906
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资金
- NIA NIH HHS [AG021953, R01 AG031152, R01 AG021953] Funding Source: Medline
- NIGMS NIH HHS [GM065513, R01 GM076643, R24 GM065513, GM61773, R01 GM061773] Funding Source: Medline
Environmental factors during juvenile growth such as temperature and nutrition have major effects on adult morphology and life-history traits. In Drosophila melanogaster, ovary size, measured as ovariole number, and body size, measured as thorax length, are developmentally plastic traits with respect to larval nutrition. Herein wer investigated the genetic basis for plasticity of ovariole number and body size, as well the genetic basis for their allometric relationship using recombinant inbred lines (RILs) derived from a natural population in Winters, California. We reared 196 RILs in four yeast concentrations and measured ovariole number and body size. The genetic correlation between ovariole number and thorax length was positive, but the strength of this correlation decreased with increasing yeast concentration. Genetic variation and genotype-by-environment (G x E) interactions were observed for both traits. We identified quantitative trait loci (QTL), epistatic, QTL-by-environment, and epistatic-by-environment interactions for both traits and their scaling relationships. The results are discussed in the context of multivariate trait evolution.
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