竹节草种质资源抗寒性初步评价研究

Evaluation of Chrysopogon aciculatus Accessions for Cold Tolerance

以85份竹节草种质资源为材料,利用2014年和2015年观测的叶片电导率、田间枯黄率和形态数据为指标进行抗寒性分析。结果表明:不同竹节草种质资源间抗寒性达极显著相关(p<0.01),在一定程度范围内,植株密度越大,叶片宽度越大,坪用质量越高,则电导率越小,抗寒性越强。相关性分析结果表明,竹节草的叶片电导率和田间枯黄率与外部形态指标间存在极显著相关(p<0.01),相关系数最高达到0.867。竹节草抗寒性与植株密度、叶宽、坪用质量呈显著相关(p<0.05)。本研究为进一步开展竹节草优异种质选育提供理论依据。

The cold resistance of Eighty-five Chrysopogon aciculatus（Retz.） Trin accessions were evaluated based on conductivity, leaf yellow rate and morphological characteristics. The results showed different C. aciculatus accessions were of extremely significant level（P〈0.01）. Within a certain degree, larger plant density led to wider leaf, and greater flat with higher quality resulted in smaller conductivity and stronger cold hardiness. There was extremely related（P〈0.01） among conductivity, leaf yellow rate and morphological characteristics and the highest correlation index was 0.867. This study would provide a theoretical basis for the further development of excellent C. aciculatus accessions.