黄瓜耐低氮基因型的筛选及遗传分析  

Screening of Cucumber Genotypes with Low-nitrogen Tolerance and Its Genetic Analysis

作　　者：于明磊[1] 秦智伟[1] 徐静静[1] 周秀艳[1] 

机构地区：[1]东北农业大学园艺学院,黑龙江哈尔滨150030

出　　处：《中国蔬菜》2011年第12期46-51,共6页China Vegetables

基　　金：国家农业科技成果转化资金(2010GB2B200131);黑龙江省高校科技创新团队(2009td07)

摘　　要：以14个黄瓜基因型为筛选材料,将盛果期所检测的10个指标与耐低氮指数进行相关性分析和通径分析,发现叶绿素b含量是最理想的黄瓜耐低氮性筛选指标。以此指标筛选得到D0328和D0422两个叶绿素b含量最高和最低的品种,分别作为父本和母本形成杂交组合。通过D0422×D0328构建6个世代(P1、P2、F1、F2、BC1P1和BC1P2)遗传分析体系,分析结果表明:黄瓜耐低氮性是数量性状,符合加性-显性模型,以加性效应为主;广义遗传力和狭义遗传力均较高,其遗传受环境因素的影响小。14 cucumber(Cucumis sativus L.)genotypes were screened for this study.The coefficient analysis and path analysis were carried out between the low-nitrogen tolerance index and all interrelated indexes.It was found that the chlorophyl b content was the ideal index for screening low-nitrogen tolerance in cucumber genotypes,and that D0328 and D0422 had the highest and lowest content of chlorophyl b,respectively.Then D0422×D0328 were chosen to make the joint segregation analysis of 6 generations,which ranged from P1 to F2.The results showed that low-nitrogen tolerance of cucumber was a kind of quantitative trait;and it matched the AD model while the additive effect played the main role.Both the broad heritability and narrow heritability were high,so the inheritance of cucumber low-nitrogen tolerance trait was hardly impacted by environmental factors.

关 键 词：耐低氮指数 相关性分析 通径分析 加性-显性模型 遗传力 

分 类 号：S642.2[农业科学—蔬菜学]