马氏珠母贝不同地理种群内自繁和种群间杂交子一代主要性状的比较

为了培育马氏珠母贝新品种，开展了不同地理种群内自繁和种群间杂交的工作，获得了3个自繁群体和3个杂交群体，BB1、DD1和SS1分别来自北海野生种群(BW)、大亚湾野生种群(DW)和三亚野生种群(SW)自繁一代；BDl、BS1和DSl分别来自BW与DW、BW与SW以及DW与SW杂交一代。运用方差分析对6个子一代群体的5个主要性状(壳长、壳宽、壳厚、总体重和壳重)进行了比较，3个杂交群体未表现出杂种优势。但获得的6个群体将成为进一步选育的基本群体。子一代的变异性增加为进一步选育奠定了基础。

Comparison on main traits of F1 from matings and crosses of different geographical populations in Pinctada martensii

Matings and crosses within and among geographically dif ferent populations of Pinctada martensii (Dunker) were carried out in order to breed new strains for pearl culture. Six populations of the f irst filial generation have been obtained. Three populations, designated BB1, DD1 and SS1, were from matings of wild populations of Beihai( BW) , Daya Bay (DW) , and Sanya ( SW) . Three populations, that is BD1, BS1 and DS1 were from cross between BW and DW, BW and SW, and DW and SW respectively. After analyzing f ive trait s, shell length, shell width, shell thickness, total weight and shell weight by ANOVA, no population of first generation from crosses had heterosis in growth. Six populat ions gained were considered as the basic populations to breed new strains. Increased Variation parameters in first f ilial generation( F1) of cross could be a very good potential for selecting new strains.