【摘要】 本研究对31份狼尾草种质资源的株高、花序长、花序宽、叶长、叶宽、始花期、花序色泽、花序形态、叶色、叶形、抗旱性共11个性状进行测定，通过变异系数、香农-维纳(Shannon-Wiener)多样性指数、灰色关联度和聚类分析对31份狼尾草种质资源进行评价。结果表明，31份狼尾草种质资源的表型性状变异系数均大于10%,其中始花期变异系数最高(51.51%),其次为花序色泽(23.53%)和叶长(20.46%),株高、花序长、花序宽、叶形和抗旱性变异系数较小(11.87%～10.16%)。31份狼尾草种质资源的株高香农-维纳多样性指数最大，叶形香农-维纳多样性指数最小。数量性状香农-维纳多样性指数总体高于质量性状。灰色关联度分析结果表明，种质资源LW1与理想品种的关联度最高(0.978),其次为LW20(0.957)和LW21(0.935)。LW15、LW4和LW3与理想品种的关联度较低。聚类分析结果显示，31份狼尾草种质资源被分为3类，第1类包括15份种质资源，该类种质资源抽穗开花早、花序形态美观、花序色泽鲜艳；第2类包括13份种质资源，该类种质资源植株高大、叶宽、花序较粗；第3类仅包括3份种质资源，该类种质资源抽穗开花晚、植株矮小。综合而言，LW1、LW20、LW21、LW13、LW25和LW29性状优良，可作为亲本用于观赏性狼尾草新品种的选育。本研究为中国本土狼尾草种质资源在观赏、生态、饲用等方面的开发利用提供了理论依据。更多还原

【Abstract】 This study measured 11 traits of 31 Pennisetum alopecuroides germplasms, including plant height, inflorescence length, inflorescence width, leaf length, leaf width, flowering date, inflorescence color, inflorescence shape, leaf color, leaf shape, and drought resistance. The germplasms were evaluated using the coefficient of variation, Shannon-Wiener diversity index, grey relational analysis, and cluster analysis. The results showed that the coefficient of variation for all phenotypic traits of the 31 germplasms was greater than 10%. The highest coefficient of variation was observed for flowering date(51.51%), followed by inflorescence color(23.53%) and leaf length(20.46%). The coefficients of variation for plant height, inflorescence length, inflorescence width, leaf shape, and drought resistance were relatively low(11.87%-10.16%). The Shannon-Wiener diversity index for plant height was the highest among the 31 germplasms, while the Shannon-Wiener diversity index for leaf shape was the lowest. The Shannon-Wiener diversity index for quantitative traits was generally higher than that for qualitative traits. The grey relational analysis indicated that LW1 had the highest correlation with the ideal variety(0.978), followed by LW20(0.957) and LW21(0.935). LW15, LW4, and LW3 had relatively low correlations with the ideal variety. The results of cluster analysis showed that the 31 germplasms were divided into three categories. The first category included 15 germplasms, which were characterized by early heading and flowering, attractive inflorescence shape, and bright inflorescence color. The second category included 13 germplasms, which were tall, had wide leaves, and relatively thick inflorescences. The third category included only three germplasms, which were late heading and flowering and had short plants. In summary, LW1, LW20, LW21, LW13, LW25, and LW29 exhibited excellent traits and could be used as parents for the breeding of new ornamental P. alopecuroides varieties. This study provides a theoretical basis for the development and utilization of native Chinese P. alopecuroides germplasms in ornamental, ecological, and forage aspects.更多还原