北美主要栽培大麦品种农艺性状分析

Analysis of Agronomic Characters of North American Cultivated Barley

对99份北美主要栽培大麦品种进行了农艺性状考察与评价,并对各性状之间进行了相关分析,以期为这批种质资源的合理利用提供依据。结果表明:大部分品种株高为半矮秆或中间型,有效穗数大于10的较多,分蘖性较强,穗长在中等或中等以上长度,小穗数较多,穗粒数不高,千粒重较低,无大粒资源,成穗率主要表现为高或中高型。从中筛选出18份综合性状较好的和一些单一性状优良的材料。相关分析表明,株高与穗粒数、千粒重、穗长,千粒重与穗长和小穗数之间的相关关系显著,可通过增加千粒重来提高大麦产量。

The agronomic characters and their associations of 99 North American barley eultivars were investigated. The results indicated that： the most eultivars were mid-height type ,with spike number of per plant more than ten. The stooling was strong. The spike length was in or above mid-length. The spikelets were more. Grain number per spike and 1000-grain weight was low. There were no large grain resources in the eultiuars. The ear bearing tiller percentage was high or medium high. Eighteen elite cuhivars with excellent agronomie performance were screen out. The correlation analysis results showed that the relationships between plant height and grain number per spike, 1000-grain weight, spike length, and 1000-grain weight and spikelets number, spike length were signifieant. Therefore, the production of barley could be improved by inereasing the 1000-grain weight.