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作 者 ：侯建华, 云锦凤

期 刊 ：草地学报 2005年 13卷 3期 页码：175-179

关键词：羊草；灰色赖草；杂交种；生物学特性；

Keywords:Leymus chinensis, Leymus cinereus, Hybrid, Biological characters,

摘 要 ：研究羊草(Leymus chinensi)、灰色赖草(Leymus cinereu)及其杂种F1生物学特性。结果表明:与双亲相比,杂种F1具有植株高大、叶片宽厚、叶量丰富、生长旺盛和穗粗大等特点;杂种F1的生产性能,特别是叶面积、茎叶比和鲜草产量具有较强的种间杂种优势,超亲优势率分别为50.0%、27.8%和20.9%;分蘖力具有负向超亲优势,负向超亲优势率为5.7%;杂种F1的粗蛋白质、无氮浸出物、粗灰分和Ca含量等表现出超亲优势,超亲优势率分别是0.71%、1.00%、22.72%和10.00%。

Abstract:The biological characters of Leymus chinensis and Leymus cinereus and their hybrid were studied. The main results showed that in comparison with parents, the hybrid F₁ had superiority in growth vigour, leaf (width and)length, spike width and length. The heterosis of the hybrid F₁ is evinced by its leaf area, the (ratio of stem)weight and leaf weight and grass yield, and over-high parent heterosis was 50.0%, 27.8% and 20.9% respectively. F₁ is inferior to its parents in tillering ability by 5.7%, while its heterosis exhibits in (crude protein), nitrogen free extract, crude ash and Ca element, which exceed those of its parentsby 0.71%, (1.0%,)22.72%, and 10.00%, respectively.

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