海滨锦葵数量性状的相关和通径分析(英文)

Correlation and Path Analysis for Quantitative Traits of Kosteletzkya virginica

对海滨锦葵的16个数量性状进行了相关和通径分析。结果表明,(1)种子产量与果实数、地径、结果枝比、结果枝数、百粒重间呈十分显著的正相关(r=0.945、0.770、0.567、0.497、0.397),与粗脂肪含量间呈显著的正相关(r=0.348);但与结果枝高度间呈十分显著的负相关(r=-0.343);粗脂肪含量与百粒重、结果枝底径和地径间呈十分显著正相关(r=0.3890、.383和0.358),但与结果枝枝下高间呈显著的负相关(r=-0.397)。(2)果实数对种子产量的直接正效应最大,其后依次是叶长、地径、结果枝长、百粒重、分枝数、结果枝角度、结果枝高度和株高;14个产量因子中有5个对产量有直接的负效应,包括叶宽、叶长宽比、结果枝数、结果枝底径和结果枝比。相关、直接作用和间接作用相结合的分析表明,对果实数、地径和百粒重的直接选择可有效增加种子产量;选择结果枝高度低的植株对种子产量改良有益;结果枝数和结果枝比的选择有助于提高种子产量,因其通过果实数和地径的间接作用较大。

Correlation and path analysis for 16 traits of Kosteletzkya virginica was carried out. The results were as follows： （1） Seed yield had highly significantly positive correlations with number of fruits （ r = 0.945）, collar diameter （ r = 0.770）, ratio of bearing branches to branches （ r = 0.567）, number of bearing branches （ r = 0.497） and hundred- seed weight （ r = 0.397）, and significantly positive correlations with crude fat content （ r = 0. 348） ; but significantly negative correlations with height of bearing branches （ r = - 0. 343 ） ; crude fat content exhibited significant positive correlations with hundred-seed weight （r = 0.389）, bottom diameter of bearing branches （r = 0.383） and collar diameter （ r = 0.358）, but significant negative correlations with height of bearing branches （ r = - 0.397）. （2） The number of fruits had the highest directly positive relationship with seed yield, followed by leaf length, collar diameter, length of bearing branch, hundred-seed weight, the number of branches, angle of bearing branches, the height of bearing branches and plant height; five of 14 seed yield components exhibited directly negative relationships with seed yield, including leaf width, ratio of leaf length to width, the number of bearing branches, bottom diameter of bearing branches and ratio of bearing branches to branches. The analyses of combining correlation, direct effects and indirect effects showed that direct selection for the number of fruits, collar diameter and hundred-seed weight would likely be effective in increasing seed yield. It is logical to select plants with lower height of bearing branches for the improvement of seed yield. The direct selection for the number of bearing branches and ratio of bearing branches to branches would be helpful for increasing seed yield due to their highly indirect effects via the number of fruits and collar diameter to seed yield.