不同种植密度下小麦主要性状与产量和蛋白质含量的灰色评判

为了明确不同种植密度下小麦主要性状与产量和蛋白质含量的关系,以4种种植密度下4个小麦新品系(种)的11个性状为指标,运用灰色关联度分析其主要性状对产量和蛋白质含量构成的影响.结果表明,在不同密度下各主要性状对产量的关联度从大到小依次是:穗长＞可孕小稳数＞穗下节长＞株高＞蛋白质舍量＞整齐度＞不孕小穗数＞成穗数＞穗重＞千粒重＞穗颈长.在不同的密度下各主要性状对蛋白质含量的关联度从大到小依次是:株高＞可孕小穗数＞穗重＞千粒重＞穗长＞整齐度＞产量＞穗下节长＞不孕小穗数＞成穗数＞穗颈长.表明不同种植密度下影响产量和蛋白质含量的主要性状各有侧重,在高产优质新品种选育中应重视可孕小穗数和株高这两个主要性状.

Gray Evaluation of Yield and Protein Content of New Wheat Strains under Different Planting Density

In order to implement the combination of cultivation and varieties,the gray correlation analysis was used to investigate 11 main characters of the yield and protein with four planting densities of four new wheat lines. For the yield, the main characters in sequence were as spike length > fertile spikelet > stem length under spike > plant height > protein content> uniformity degree > infertile spikelet > spikes number per plant > seed weight per spike > 1000 grain weight> spike neck length; For the protein, the main characters in sequence were as plant height > fertile spikelet > seed weight per spike > 1000 grain weight> spike length > uniformity degree > yield> stem length under spike > infertile spikelet > spikes number per plant > spike neck length. The results suggested that the main characters of the yield and protein had different effects at different planting densities, we should pay attention to the two main characters of number of fertile spike and plant height.