Chromosome inheritance in triploid Pacific oyster Crassostrea gigas thunberg

doi:10.1038/sj.hdy.6800517

	Chromosome inheritance in triploid Pacific oyster Crassostrea gigas thunberg
	Gong, N ; Yang, H; Zhang, G ; Landau, BJ ; Guo, X ; Guo, X, Rutgers State Univ, Haskin Shellfish Res Lab, Inst Marine & Coastal Sci, 6959 Miller Ave, Port Norris, NJ 08349 USA
	2004-11-01
发表期刊	HEREDITY
ISSN	0018-067X
卷号	93 期号:5 页码:408-415
文章类型	Article
摘要	Reproduction and chromosome inheritance in triploid Pacific oyster (Crassostrea gigas Thunberg) were studied in diploid female x triploid male (DT) and reciprocal (TD) crosses. Relative fecundity of triploid females was 13.4% of normal diploids. Cumulative survival from fertilized eggs to spat stage was 0.007% for DT crosses and 0.314% for TD crosses. Chromosome number analysis was conducted on surviving progeny from DT and TD crosses at 1 and 4 years of age. At Year 1, oysters from DT crosses consisted of 15% diploids (2n = 20) and 85% aneuploids. In contrast, oysters from TD crosses consisted of 57.2% diploids, 30.9% triploids (3n = 30) and only 11.9% aneuploids, suggesting that triploid females produced more euploid gametes and viable progeny than triploid males. Viable aneuploid chromosome numbers included 2n + 1, 2n + 2, 2n + 3, 3n - 2 and 3n - 1. There was little change over time in the overall frequency of diploids, triploids and aneuploids. Among aneuploids, oysters with 2n + 3 and 3n-2 chromosomes were observed at Year 1, but absent at Year 4. Triploid progeny were significantly larger than diploids by 79% in whole body weight and 98% in meat weight at 4 years of age. Aneuploids were significantly smaller than normal diploids. This study suggests that triploid Pacific oyster is not completely sterile and cannot offer complete containment of cultured populations.; Reproduction and chromosome inheritance in triploid Pacific oyster (Crassostrea gigas Thunberg) were studied in diploid female x triploid male (DT) and reciprocal (TD) crosses. Relative fecundity of triploid females was 13.4% of normal diploids. Cumulative survival from fertilized eggs to spat stage was 0.007% for DT crosses and 0.314% for TD crosses. Chromosome number analysis was conducted on surviving progeny from DT and TD crosses at 1 and 4 years of age. At Year 1, oysters from DT crosses consisted of 15% diploids (2n = 20) and 85% aneuploids. In contrast, oysters from TD crosses consisted of 57.2% diploids, 30.9% triploids (3n = 30) and only 11.9% aneuploids, suggesting that triploid females produced more euploid gametes and viable progeny than triploid males. Viable aneuploid chromosome numbers included 2n + 1, 2n + 2, 2n + 3, 3n - 2 and 3n - 1. There was little change over time in the overall frequency of diploids, triploids and aneuploids. Among aneuploids, oysters with 2n + 3 and 3n-2 chromosomes were observed at Year 1, but absent at Year 4. Triploid progeny were significantly larger than diploids by 79% in whole body weight and 98% in meat weight at 4 years of age. Aneuploids were significantly smaller than normal diploids. This study suggests that triploid Pacific oyster is not completely sterile and cannot offer complete containment of cultured populations.
关键词	Triploidy Aneuploidy Chromosome Sterility Evolution Mollusc
学科领域	Ecology ; Evolutionary Biology ; Genetics & Heredity
DOI	10.1038/sj.hdy.6800517
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000224693300003
引用统计	被引频次：36[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/1788
专题	海洋生态与环境科学重点实验室
通讯作者	Guo, X, Rutgers State Univ, Haskin Shellfish Res Lab, Inst Marine & Coastal Sci, 6959 Miller Ave, Port Norris, NJ 08349 USA
作者单位	1.Rutgers State Univ, Haskin Shellfish Res Lab, Inst Marine & Coastal Sci, Port Norris, NJ 08349 USA 2.Chinese Acad Sci, Inst Oceanol, Expt Marine Biol Lab, Qingdao 266071, Shandong, Peoples R China 3.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Gong, N,Yang, H,Zhang, G,et al. Chromosome inheritance in triploid Pacific oyster Crassostrea gigas thunberg[J]. HEREDITY,2004,93(5):408-415.
APA	Gong, N,Yang, H,Zhang, G,Landau, BJ,Guo, X,&Guo, X, Rutgers State Univ, Haskin Shellfish Res Lab, Inst Marine & Coastal Sci, 6959 Miller Ave, Port Norris, NJ 08349 USA.(2004).Chromosome inheritance in triploid Pacific oyster Crassostrea gigas thunberg.HEREDITY,93(5),408-415.
MLA	Gong, N,et al."Chromosome inheritance in triploid Pacific oyster Crassostrea gigas thunberg".HEREDITY 93.5(2004):408-415.

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