全球智库信息集成服务系统(G2TT): Genetic polymorphism and trade-offs in the early life-history strategy of the Pacific oyster, Crassostrea gigas (Thunberg, 1795): A quantitative genetic study.

G2TT

来源类型	Article
规范类型	其他
DOI	10.1046/j.1420-9101.2003.00543.x
	Genetic polymorphism and trade-offs in the early life-history strategy of the Pacific oyster, Crassostrea gigas (Thunberg, 1795): A quantitative genetic study.
	Ernande B; Clobert J; McCombie H; Boudry P
发表日期	2003
出处	Journal of Evolutionary Biology 16 (3): 399-414
出版年	2003
语种	英语
摘要	We investigated genetic variability and genetic correlations in early life-history traits of Crassostrea gigas. Larval survival, larval development rate, size at settlement and metamorphosis success were found to be substantially heritable, whereas larval growth rate and juvenile traits were not. We identified a strong positive genetic correlation between larval development rate and size at settlement, and argue that selection could optimize both age and size at settlement. However, trade-offs, resulting in costs of metamorphosing early and large, were suggested by negative genetic correlations or covariances between larval development rate/size at settlement and both metamorphosis success and juvenile survival. Moreover, size advantage at settlement disappeared with time during the juvenile stage. Finally, we observed no genetic correlations between larval and juvenile stages, implying genetic independence of life-history traits between life-stages. We suggest two possible scenarios for the maintenance of genetic polymorphism in the early life-history strategy of C. gigas.
主题	Adaptive Dynamics Network (ADN)
关键词	Age and size at metamorphosis Age and size at settlement Costs Genetic correlations Genetic variability Marine bivalve molluscs Metamorphosis Oysters Settlement Trade-offs
URL	http://pure.iiasa.ac.at/id/eprint/6891/
来源智库	International Institute for Applied Systems Analysis (Austria)
引用统计
资源类型	智库出版物
条目标识符	http://119.78.100.153/handle/2XGU8XDN/128278
推荐引用方式 GB/T 7714	Ernande B,Clobert J,McCombie H,et al. Genetic polymorphism and trade-offs in the early life-history strategy of the Pacific oyster, Crassostrea gigas (Thunberg, 1795): A quantitative genetic study.. 2003.