中东大麦群体农艺性状多样性与生态地理因素的关联分析

将216份大麦材料(引自中东5个不同生态地区的5个野生大麦自然群体和其相应地区的5个农家种大麦群体)分2a种植在陕西关中地区,对其9个主要农艺性状进行分析。结果表明,大麦群体间分别在株高、穗长、芒长、穗下节长、旗叶宽、旗叶长、穗粒数、分蘖数等农艺性状上存在显著差异,大麦群体间总体表现出丰富的遗传多样性,野生大麦群体间多样性高于农家种。3个地区的大麦农艺性状差异更加显著;野生大麦群体间多样性高于其群体内,而农家种大麦群体间多样性低于其群体内。试验材料的农艺性状和来源地生态地理环境关联分析表明,部分性状可以和生态地理环境相关联,主要是和作物产量相关的农艺性状与温度、降水量及海拔等因素相关联;与农家种大麦相比,野生大麦与生态地理环境的关联更为密切。

Genetic Diversity Analysis of Agronomic Traits and Geographical Factors Correlation in the Middle East Barley Population

Agronomic traits of 91 samples representing five populations of Hordeum spontaneum C.Koch and of 125 samples representing five populations of barley landrace from different areas of the Middle East were evaluated in this study.The results indicated that there was mighty significant difference between populations mainly in the traits of plant height,spike length,awn length,peduncle and extrusion,flag leaf width,flag leaf length and grains per spike,there was more significant difference intra-populations in the three of five areas,and with high genetic diversity totally.Regression analysis between agronomic traits and eco-geographical environmental factors showed that partly agronomic traits had a degree of relationship with eco-geographical environmental factors,mainly traits related of crop yield with temperature,rainfall and altitude etc,wild barleys had closer correlation with eco-geographical environmental factors than barley landraces.