菜心主要农艺性状遗传相关与通径分析  

Genetic Correlation and Path Analysis of Several Main Agronomic Characters in Tsai hsin ( Brassica rapa ssp. parachinensis )

作　　者：曾国平[1] 章崇玲[2] 

机构地区：[1]华南农业大学园艺系,广州510642 [2]华南农业大学生物技术学院

出　　处：《中国蔬菜》1999年第5期10-12,共3页China Vegetables

摘　　要：选用１４ 个 菜心品 种研究了１１ 个农 艺性状的 表型相 关、遗传相 关和产 量的通径 分析。结果表 明，农艺 性状间的 遗传相 关一 般 大于 表 型相 关。单 株 菜薹 质量 与 菜薹 粗、叶数、叶 片质 量、叶柄质 量和株 高 等 具 有 显 著 正 相 关， 遗 传 相 关 系 数 分 别 为 ：ｒ ＝ ０ ．９９４ 、０ ．９８２ 、０ ．９６５ 、０ ．９１３ 和０ ．６３２ ，单 株菜薹 质量与其 它农艺性 状相 关不 显著。 遗传 通径 分析 表明 ，菜薹 粗、叶片质量对 单株菜薹 质量的 直接作 用最 大， 其次 为叶 数。 菜薹 粗、叶片 质量 和 叶数 可作 为 选育 菜 心丰产品种 的选择 性状。The phenotypic and genotypic correlations of 11 agronomic characters were studied with 14cultivars of Tsai hsin. The results showed that the phenotypic correlations were lower than genetic correlations. The genetic correlation coefficients between flower stalk weight and flower stalk width in diameter,leaves number,blade weight,petiole weight and plant height were very significant,r=0.994 ** ,0.982 ** ,0.965 ** ,0.913 ** and 0.632 *,respectively. There were no significant genetic correlations between flower stalk weight and other agronomic traits. The results of genetic path analysis indicated that both the direct and indirect effects of flower stalk width in diameter,blade weight and leaves number on flower stalk weight were principal. Therefore,these three characters could be taken as selection characters for high yield.

关 键 词：菜心 农艺性状 遗传相关 通径分析 

分 类 号：S634.903.2[农业科学—蔬菜学]