马卡小麦主要农艺性状分析

Analysis in Principle Agronomic Traits of Triticum macha Dekaprel et Menabde

对29份马卡小麦主要农艺性状进行了考察与分析。结果表明,马卡小麦具有植株高大、分蘖力强和小穗数多等特点。偏相关分析表明,分蘖数与有效穗数,成穗率与有效穗数,千粒重与小穗数偏相关均达极显著水平。单株产量与穗长偏相关显著,与有效穗数、穗粒重偏相关达极显著水平。蛋白质含量与穗长偏相关显著。主成分分析揭示了粒重、有效穗数、成穗率、株高和穗长对变异的贡献率达90.32%。基于因子得分与主成分贡献率的遗传距离在0.62水平上可将供试材料分为四类。这些结果为进一步利用马卡小麦基因资源提供了一定的理论依据。

Twenty-nine accessions of Triticum macha Dekaprel et Menabde were carried out by partial-correlation, principle component and clustering analysis. In general, T.macha accessions had higher plant height, strong tillering ability, and more spikelets. Partial-correlation analysis indicated that the correlations between the tiller numbers and the spike numbers per plant, forming spike percent and the spike numbers per plant, lO00-grain weight and the spikelet number per spike were significant positive significant, respectively. These accessions had a extremely significant positive partial-correlation between grains weight per plant and spikelet numbers per spike, grains weight per spike, respectively. There was a positive partialcorrelation between protein content and spike length. Principle component analysis showed the first five main components （grain weight, spikelet numbers per spike, forming spikelet percent, plant height and spike length） had the contrition of 90.32% to variation. By clustering analysis, all the materials were divided into four groups. These results afforded theoretical proof for further utilizing genetic resource of T.maha.