Evaluating spawning performance among captive Florida pompano Trachinotus carolinus broodstock using microsatellite-based parentage assignment
文献类型: 外文期刊
第一作者: Ma, Qian
作者: Ma, Qian;Resley, Matthew J.;Rhody, Nicole R.;Main, Kevan L.;Leber, Kenneth M.;Ma, Qian;Seyoum, Seifu;Tringali, Michael D.
作者机构:
关键词: Florida pompano;microsatellites;parentage assignment;rapid growth trait;reproductive success
期刊名称:AQUACULTURE RESEARCH ( 影响因子:2.082; 五年影响因子:2.415 )
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收录情况: SCI
摘要: Florida pompano has been identified as a promising candidate for commercial-scale aquaculture production, but to date, little information is available regarding captive broodstock spawning characteristics. Genetic markers were tested for their power in monitoring mating outcomes and potential in analysing heritability of rapid growth trait in Trachinotus carolinus. A total of 20 unrelated adults (10 females and 10 males) were chosen for a hormone-induced mass spawning event. The 515 fastest growing and 485 slowest growing fish of the total 4852 offspring were considered a selected progeny stock, and fish were collected at 45 days post hatch based on their growth traits. Parentage analyses based on the 20 breeders and 1,000 selected progeny were performed using a total of nine microsatellite markers, a 100% assignment rate was achieved, and a four-marker set was the minimum number for the parentage assignment. The effective breeding number for the selected progeny was 11 (six females and five males), among which three females and two males were predominant contributors with the total contribution of 95.8% and 94.7% respectively. The proportion of fast-growing offspring from broodfish and each mating cross (sire/dam) was used for detecting whether variation in growth of the offspring was related to parental stocks. Results showed that three adults and their mated combination exhibited the greatest fast-growing offspring proportion (69.73% and 55.95%). This research provided new information regarding spawning performance and parental contribution during mass spawning events; both important first steps towards developing improved management strategies for captive Florida pompano broodstock.
分类号: S9
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