密穗小麦(Triticum compactum)农艺性状分析

对来自19个国家的60份密穗小麦(Triticum compactum)材料进行农艺性状分析。结果表明,密穗小麦抽穗期从151~195 d,包括了早熟到晚熟的各种类型,多表现为晚熟。植株高度总体偏高,少数适中。单株有效分蘖数大多在10个以上,有效穗数变幅为6.8~30.2个,成穗率平均为70%。穗长、小穗数和单位长度着生小穗数存在一定差异,但均表现为密穗型。大部分材料穗粒数较多,但千粒重明显偏低。多数材料严重感染白粉病,仅有8份材料抗白粉病。性状相关分析表明,随着抽穗期缩短,穗粒数和千粒重增加,但小穗数有减少的趋势。

Agronomic Performance of Triticum compactum

Sixty Triticum compacturn accessions from nineteen countries were evaluated for their agronomic performance. The results show that the heading date ranges from 151 to 195 days, including early- to late-maturing types, and most accessions are later type. Most accessions have higher plant height. Tiller numbers per plant are more than 10 and rate of spike to tillers average 70%. Obvious differences are found in spike length, spikelets per spike, but most accessions are dense spike type. T. compactum accession is higher in number of grain per spike with lower weight of 1000-grains. In addition, most accessions except 8 accessions are seriously susceptible to powdery mildew. Correlation analysis of characters indicates that shortening heading date can cause the increase in grains number per spike and 1000-grain weight, but decreases in spikelet per spike.