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首页> 外文期刊>Marine biology >Genetic heterogeneity in a single year-class from a panmictic population of adult blue rockfish (Sebastes mystinus)
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Genetic heterogeneity in a single year-class from a panmictic population of adult blue rockfish (Sebastes mystinus)

机译：成年蓝石鱼（Sebastes mystinus）的大型种群的一年级遗传异质性

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摘要

We used microsatellite genetic markers to investigate adult population structure and the formation of a new year-class in Sebastes mystinus (blue rockfish). Since S. mystinus may live as long as 45 years and reach reproductive age at approximately 5 years, the adult population may contain as many as eight generations of reproductive adults. We investigated whether the juveniles of the 2000 year-class and the adult population were genetically homogeneous along the California coast. We sampled approximately 100 juveniles from three sites, two sites along the Monterey Peninsula (Carmel and Monterey) in central California and one at Fort Ross in northern California, and approximately 50 adult S. mystinus from five sites throughout the population center. The adult sampling spanned approximately 700 km from the northern Channel Islands to Fort Bragg. The juveniles showed significant heterogeneity in allele frequencles among distant locations and genetic homogeneity among adjacent locations. In contrast, the adults showed genetic homogeneity over large distances (San Miguel Island to Fort Bragg), indicating little limitation of gene flow in this region. Allele frequencles of juveniles differed from adult samples and in some cases reduced genetic diversity indicative of sweepstakes recruitment (small sample of the adult reproductive potential). The genetic structure of the 2000 year-class suggests that despite a genetically homogenous adult population, settled juveniles can be genetically heterogeneous along the California coast. The results also suggest that the adults, with several year-classes, are capable of maintaining a panmictic population despite the genetic distinctiveness of individual year-classes.
机译：我们使用微卫星遗传标记来调查成年种群结构和塞巴斯蒂斯mystinus（蓝色石鱼）中新的一年级的形成。由于mystinus可以活到45岁，并在大约5岁时达到生殖年龄，因此成年人口可能包含多达八代生殖成年。我们调查了2000年级的青少年和成年人口在加利福尼亚州沿海地区是否在遗传上同质。我们从三个地点，加利福尼亚州中部蒙特雷半岛的两个地点（卡梅尔和蒙特雷）和加利福尼亚北部的罗斯堡的一个地点采样了大约100个少年，并从整个人口中心的五个地点采样了大约50个成年链霉菌。从北海峡群岛到布拉格堡，成人采样距离约700公里。少年在远地点之间的等位基因频率中表现出显着的异质性，而邻近地点之间的遗传同质。相比之下，成年人在远距离（从圣米格尔岛到布拉格堡）上显示出遗传同质性，表明该区域的基因流动几乎没有限制。少年的等位基因频率与成年样本不同，在某些情况下，遗传多样性降低，表明抽奖活动已征集（成年生殖潜力的小样本）。 2000年级的遗传结构表明，尽管成年成年人具有遗传同质性，但定居的少年在加利福尼亚海岸沿线仍可能具有异质性。结果还表明，尽管个别年级具有不同的遗传学特征，但具有若干年级的成年人仍能够维持恐慌人群。

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  • 来源
    《Marine biology》 |2007年第2期|p.451-465|共15页
  • 作者

    Martha O. Burford; Ralph J. Larson;

  • 作者单位

    Department of Ecology and Evolutionary Biology, University of California Santa Cruz, Long Marine Lab, 100 Shaffer Road, Santa Cruz, CA 95060, USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 环境生物学;
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