马氏珠母贝3个野生种群及种群间杂交后代遗传多样性的ISSR分析

被引：22

作者：

吕林兰 ^{[1
]}

杜晓东 ^{[2
]}

王嫣 ^{[3
]}

石耀华 ^{[3
]}

王爱民 ^{[3
]}

机构：

[1] 盐城工学院

[2] 广东海洋大学

[3] 海南大学海洋学院

来源：

水生生物学报 | 2008年 / 01期

关键词：

马氏珠母贝; 野生种群; 遗传多样性; 杂交; ISSR标记;

D O I：

暂无

中图分类号：

S917.4 [水产动物学];

学科分类号：

摘要：

运用ISSR分子标记技术分析了马氏珠母贝(Pinctada martensii)广西北海(BW)、广东大亚湾(DW)和海南三亚(SW)野生种群及其自繁子一代(BB1、SS1、DD1)和杂交子一代(BS1、BD1、DS1)9个群体各50个个体的遗传多样性。结果表明:3个野生群体遗传多样性分别是0.2585、0.2607和0.2571;3个自繁群体子一代遗传多样性分别是0.2504、0.2545和0.2527,3个杂交子一代遗传多样性分别是0.2747、0.2659和0.2784。种群间杂交增加了子代的遗传多样性,同时增加了杂交子一代与杂交亲本间的遗传距离,而自繁群体的遗传多样性与其来源的野生种群比较,遗传多样性降低。本文指出利用野生群体进行杂交育种应该纯化亲本才能获得杂种优势,人工育苗或选择性育种需要保持足够数量的繁殖亲本以避免遗传多样性降低。

引用

页码：26 / 32

页数：7

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