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中国农学通报 ›› 2026, Vol. 42 ›› Issue (17): 189-195.doi: 10.11924/j.issn.1000-6850.casb2026-0199

• 水产渔业 • 上一篇    下一篇

梨形环棱螺高密度遗传图谱构建及性别、生长性状QTL定位

吴昊1,2(), 马学艳2, 闻海波2, 杨凯旋1,2, 袁凯1,2, 马本贺3, 潘贤辉4, 金武2()   

  1. 1 大连海洋大学水产与生命学院, 辽宁大连 116023
    2 中国水产科学研究院淡水渔业研究中心/农业农村部稻渔综合种养生态重点实验室, 江苏无锡 214081
    3 江西省水产科学研究所, 南昌 330039
    4 广西水产科学研究院广西水产遗传育种与健康养殖重点实验室, 南宁 530021
  • 收稿日期:2026-03-17 修回日期:2026-06-04 出版日期:2026-09-09 发布日期:2026-09-09
  • 通讯作者:
    金武,男,1984年出生,副研究员,主要从事淡水贝类种质资源与遗传育种研究。通信地址:214128 无锡市滨湖区雪浪街道壬港社区薛家里69号 中国水产科学研究院淡水渔业研究中心,Tel:0510-85559775,E-mail:
  • 作者简介:

    吴昊,男,2002年出生,江苏盐城人,硕士,研究方向:贝类种质资源与遗传育种研究。E-mail:

  • 基金资助:
    广西省重点研发计划“螺蛳(环棱螺和圆田螺)新品种(系)选育与扩繁技术研究及示范”(桂科农AB2506910042); 江西省水产育种联合攻关项目“中华园田螺品种选育联合攻关项目”(jxsczy202603); 苏州市科技计划“环棱螺‘蠡湖1号’对加州鲈鱼养殖水体净化效果的应用研究”(SNG2023017)

Construction of a High-density Genetic Map and QTL Mapping for Sex and Growth Traits in Bellamya purificata

WU Hao1,2(), MA Xueyan2, WEN Haibo2, YANG Kaixuan1,2, YUAN Kai1,2, MA Benhe3, PAN Xianhui4, JIN Wu2()   

  1. 1 College of Fisheries and Life Science, Dalian Ocean University, Dalian, Liaoning 116023
    2 Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences/Key Laboratory of Integrated Rice-Fish Farming Ecology, Ministry of Agriculture and Rural Affairs, Wuxi, Jiangsu 214081
    3 Jiangxi Fisheries Research Institute, Nanchang 330039
    4 Guangxi Fisheries Research Institute/Key Laboratory of Fisheries Genetic Breeding and Healthy Aquaculture of Guangxi, Nanning 530021
  • Received:2026-03-17 Revised:2026-06-04 Published:2026-09-09 Online:2026-09-09

摘要:

为推动梨形环棱螺的分子标记辅助育种及相关功能基因的精细定位,本研究利用全基因组重测序技术,对梨形环棱螺重组近交系‘RIL3’的42个个体构建作图群体。通过挖掘和筛选高质量全基因组SNP标记,利用HighMap软件构建高密度遗传图谱,并采用R/qtl软件对性别、生长性状进行了QTL定位,通过基因组注释与功能富集分析,筛选出潜在的候选基因。研究成功构建了一个包含1503个Bin标记、总图距1115.71 cM的高密度遗传图谱,标记平均间距仅为0.81 cM。在连锁群LG2上定位到4个与性别(XB)、体重(TZ)和壳宽(KK)显著相关的QTL,其中性别QTL解释了17.32%的表型变异;候选基因分析发现,性别QTL区间富集于跨膜信号转导、蛋白质去磷酸化及脂质代谢相关基因,生长性状QTL区间则涉及几丁质代谢、激酶信号与基础代谢通路。结果表明,梨形环棱螺的性别决定可能受到以受体酪氨酸磷酸酶为核心的非经典信号网络调控,其生长性状受到多基因的协同影响,这为深入解析该物种的性别与生长性状的分子机制解析及分子育种提供了关键的遗传学依据。

关键词: 梨形环棱螺, 遗传图谱, QTL, 性别决定, 生长性状

Abstract:

In order to carry out molecular marker-assisted breeding and fine mapping of related functional genes of Bellamya purificata, 42 individuals of the recombinant inbred line ‘RIL3’ of B. purificata were used as the mapping population. Based on the whole genome resequencing technology, the whole genome SNP markers were mined and screened. The high-quality SNP markers obtained by mining and screening were used to construct a high-density genetic map using HighMap software. R/qtl software was used to locate QTLs related to gender and growth traits, and candidate genes were screened by genome annotation and functional enrichment analysis. A high-density genetic map containing of 1503 Bin markers with a total map distance of 1115.71 cM was successfully constructed, with an average marker spacing of 0.81 cM. Four QTLs for sex (XB), weight (TZ) and shell width (KK) were mapped on LG2, and the sex QTL explained 17.32 % of the phenotypic variation. Candidate gene analysis showed that the gender QTL interval was enriched in genes related to transmembrane signal transduction, protein dephosphorylation and lipid metabolism, and the growth trait QTL interval was involved in chitin metabolism, kinase signaling and basal metabolic pathways. The results indicate that the sex determination of B. purificata may be regulated by a non-classical signal network with receptor tyrosine phosphatase as the core, and the growth traits are affected by multiple genes, which provide a key genetic basis for the molecular mechanism analysis and molecular breeding of sex and growth traits of this species.

Key words: Bellamya purificata, genetic map, QTL, sex determination, growth traits

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