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草业学报  2015 

不同燕麦品种饲草和籽粒生产性能分析

DOI: 10.11686/cyxb2014465, PP. 120-130

Keywords: 性状,聚类分析,相关分析,多元逐步回归

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Abstract:

为探明不同燕麦品种饲草和籽粒生产性能的差异及其原因,本研究以青海省普遍种植的8份燕麦品种为试验材料,通过聚类分析、相关分析和多元逐步回归分析,明确了高产燕麦的性状特征。研究得到以下主要结果:1)不同燕麦品种的饲草和籽粒生产性能存在差异,青燕1号和林纳的饲草和籽粒产量最高,草莜1号和青莜2号饲草和籽粒产量最低;2)聚类分析可将8种燕麦分为两大类:第一类为综合表现较差的加燕2号、青引2号、草莜1号和青莜2号,第二类为综合表现较好的林纳、青燕1号、尼央和青永久887,其饲草和籽粒产量较第一类燕麦可分别提高12.8%和14.2%;3)两类燕麦的饲草产量均与株高显著正相关,与茎直径显著负相关;籽粒产量与株高、千粒重、带稃种子长度和宽度显著正相关,与茎直径、穗粒数、空铃数、籽粒容重显著负相关,说明不同燕麦的饲草产量同其性状的相关关系相对比较稳定;4)多元逐步回归分析表明,茎直径对两类燕麦品种的饲草产量的贡献显著且系数较大,茎直径和带稃种子宽度对籽粒产量的贡献显著且系数较大。与第一类燕麦品种相比较,茎直径对第二类燕麦饲草和籽粒产量的负向作用系数较小,而种子宽度的正向作用系数较大,是其高产的内在原因。因此,茎直径和种子宽度可作为燕麦选育的重要参考指标。

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