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Path coefficient and cluster analyses of yield and morphological traits in Pennisetum purpureum

文献类型： 外文期刊

作者： Zhang, Xia 1 ; Gu, Hongru 1 ; Ding, Chenglong 1 ; Zhong, Xiaoxian 1 ; Zhang, Jianli 1 ; Xu, Nengxiang 1 ;

作者机构： 1.Jiangsu Acad Agr Sci, Inst Anim Sci, Nanjing, Peoples R China

期刊名称：TROPICAL GRASSLANDS （ 影响因子：0.224； 五年影响因子：0.409 ）

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收录情况： SCI

摘要： In order to develop and select improved populations and germplasm of elephant grass for forage and bioenergy production, important morphological traits including dry matter yield, leaf: stem ratio, plant height, tillers/plant, leaf length, leaf widthand stem width were investigated in 16 lines of elephant grass (Pennisetum purpureum), one purple elephant grass and hybrid pennisetum (pearl millet x elephant grass). Data were examined using correlation analysis, path analysis and cluster analysis. Plant height and tillers/plant were positively (P<0.05) correlated with yield, while leaf length and leaf:stem ratio were negatively (P<0.05) correlated with DM yield. The factors with greatest effect on DM yield were plant height and leafrstem ratio. The elephant grasses and hybrid pennisetum were divided into 4 groups by cluster analysis based on DM yield, leaf:stem ratio, plant height etc. The 4 groups were: Group 1 - dwarf type with numerous tillers, lowest DM yield and highest leafrstem ratio; Group 2- semi-dwarf types with plentiful tillers, plus higher DM yields and plant heights and fewer tillers/plant than Group 1; Group 3 - intermediate height types with moderate tillering, but higher DM yields than Groups 1 and 2; Group 4 - tall types with limited tillering but highest DM yields and lowest leaf: stem ratios.

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