Evidence for genetic control of pigmentation of shell and mantle edge in selected families of Pacific oysters, Crassostrea gigas
Evidence for genetic control of pigmentation of shell and mantle edge in selected families of Pacific oysters, Crassostrea gigas
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太平洋牡蛎（Crassostrea gigas）部分品系贝壳和外壳边缘色素沉着的遗传控制证据
DOI：
10.1016/s0044-8486(03)00325-9
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发表时间：
2004-01-12
期刊：
影响因子：
4.5
通讯作者：
Langdon, C
中科院分区：
文献类型：
--
作者：
Brake, J;Evans, F;Langdon, C
三个实验组的纯种牡蛎，每个都经过一到两代的选择，对贝壳和外套膜边缘的色素沉着进行了研究。初步调查显示这些特征很复杂，最好描述为连续的。所有三个队列的壳和幔边缘色素沉着的平均组内相关系数 (t) 分别为 0.766 和 0.666 (n = 75)，表明高度的遗传控制。在某些情况下，块效应（种植深度）也很显着，尽管趋势不太明显，并且这些效应最多仅占观察到的总表型变异的 7.6%。外套膜边缘色素沉着和贝壳色素沉着呈正相关（P < 0.0001，r = 0.578，n = 45），然而，这种相关性在三个队列中只有两个具有统计学显着性（P < 0.4994，r = 0.193，n = 15）。除两个案例外（P = 0.0400 和 P = 0.0359，n = 75），平均家庭个体体重（g）、存活率（%）和产量（kg bag(-1)）的性能特征与外套边缘或壳色素沉着无关（P > 0.09，n = 75）。这是首次报道遗传因素对巨牡蛎壳和外套膜色素沉着的影响。这些发现对于将色素沉着作为牡蛎育种计划中所需性状的控制具有重大意义。 (C) 2004 Elsevier Science B.V. 保留所有权利。
Three experimental cohorts of pedigreed oysters, each having gone through one or two generations of selection, were investigated for both shell and mantle edge pigmentation. Initial investigations showed the traits to be complex and best described as continuous. Average intraclass correlations coefficients (t) for all three cohorts of 0.766 and 0.666 (n = 75) were obtained for shell and mantle edge pigmentation, respectively, indicating a high degree of genetic control. Block effects (depth at planting) were also significant in some cases, though trends were less obvious, and these effects only accounted for a maximum of 7.6% of the total observed phenotypic variation. Mantle edge pigmentation and shell pigmentation were positively correlated (P < 0.0001, r = 0.578, n = 45), however, this correlation was statistically significant in only two of the three cohorts (P < 0.4994, r = 0.193, n = 15). The performance traits of average family individual body weight (g), survival (%), and yield (kg bag(-1)) were not correlated with mantle edge or shell pigmentation (P > 0.09, n = 75) in all but two cases (P = 0.0400 and P = 0.0359, n = 75). This is the first report of a genetic effect on shell and mantle pigmentation in Crassostrea gigas. These findings have major implications for the manipulation of pigmentation as a desired trait in an oyster breeding program. (C) 2004 Elsevier Science B.V. All rights reserved.