浦东白猪遗传多样性及繁殖性能的变化分析

发布时间：2018-08-04 16:53

【摘要】：试验旨在研究浦东白猪现存群体的遗传多样性及其繁殖性能变化的原因。利用全基因组范围内的遗传标记(SNPs),对比6个太湖流域地方品种及3个西方引进品种,对浦东白猪的遗传多样性进行了分析。同时利用落入繁殖候选基因内的SNPs,分析了群体的多样性及结构。结果显示,相较于本研究中所选择的太湖流域地方品种及西方引进品种,浦东白猪的遗传多样性较太湖流域地方品种低;除枫泾猪外,浦东白猪繁殖相关SNPs的多态性标记的比例、期望杂合度最低,等位基因丰度仅高于杜洛克猪;主成分分析(PCA)结果揭示浦东白猪繁殖相关SNPs位点仍具有其群体独特性。研究结果揭示了浦东白猪现存群体遗传多样性较低,繁殖性能的退化可能是由于一些有利等位基因的灭绝、繁殖相关基因多态性及个体杂合性的降低所致。但是浦东白猪仍然携带一定数量的有利等位基因且依旧具有其群体独特性,暗示浦东白猪仍具有较高的保种价值。本研究为浦东白猪后期的选育、保种和开发利用提供了一定的参考。
[Abstract]:The aim of the experiment was to study the genetic diversity and reproductive performance of Pudong White Pig. Genetic diversity of Pudong White Pigs was analyzed by using genomic (SNPs), to compare 6 local breeds and 3 imported varieties in Taihu Basin. At the same time, the diversity and structure of the population were analyzed by using SNPs which fell into the breeding candidate gene. The results showed that the genetic diversity of Pudong White Pig was lower than that of Taihu River Basin, except for Fengjing Pig. The proportion of polymorphic markers of reproductive related SNPs in Pudong white pigs was the lowest and the allelic abundance was only higher than that in Duroc pigs. Principal component analysis (PCA) showed that the SNPs loci of Pudong white pigs were still unique in population. The results showed that the genetic diversity of the existing population of Pudong white pigs was low, and the degradation of reproductive performance might be due to the extinction of some favorable alleles, the decrease of polymorphism of breeding related genes and the decrease of individual heterozygosity. However, Pudong White Pig still carries a certain number of favorable alleles and still has its own unique population, suggesting that Pudong White Pig still has a high conservation value. This study provides some references for breeding, conservation, development and utilization of Pudong White Pig.
【作者单位】：上海交通大学农业与生物学院;上海市兽医生物技术重点实验室;上海市南汇区种畜场;
【基金】：上海市科技兴农重点攻关课题(沪农科推字(2016)第1-4号、沪农科产字(2014-2016)第6号) 十二五农村领域国家科技计划课题:优异地方猪种资源收集和品种保护策略集成(2015BAD03B01-02)
【分类号】：S828

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