摘要
比较了小麦族赖草属11个物种的形态特征差异。结果表明,赖草属植物在进化过程中适应不同的生活环境造成了该属植物丰富的形态学特性。大赖草、宽穗赖草、沙生赖草和天山赖草应归于Sect.LeymusHochst.;羊草和单小穗赖草属于Sect.Anisopyrum(Griseb.)Tzvel.;赖草、多枝赖草、毛穗赖草、窄颖赖草和卡瑞赖草应归于Sect.Aphanoneuron(Nevski)Tzvel.。通过外部形态演化,分析了赖草属3个组的系统发育水平。
11 species of Leymus Hochst. were used to compare their differences in morphological characters. The results are as follows: because of evolution and environmental variation, there exists distinct morphological variation in Leymus. L.racemosus, L.ovatus, L.arenarius and L.tianshanicus belong to Sect. Leymus Hochst., while L.chinensis and L.aemulans are included in Sect.Anisopyrum (Griseb.) Tzvel., and L.secalinus, L.multicaulis, L.paboanus, L.angustus and L.karelinii are categorized in Sect.Aphanoneuron (Nevski) Tzvel.. Morphological evidences indicate that the Sect.Leymus is a relatively primitive section, whereas the Sect.Anisopyrum is an advanced section, and the Sect.Aphanoneuron is between them.
出处
《四川农业大学学报》
CSCD
2003年第3期196-200,共5页
Journal of Sichuan Agricultural University
基金
四川省教育厅项目
四川省科技厅科研项目。
关键词
赖草属
形态特征
进化
Leymus
morphological character
evolution
