摘 要 ：窄颖仲彬草Kengyilia stenachyra(Keng)J.L.Yang,Yen et Baum是分布于我国西部的一种多年生六倍体植物。将其与犬草Elymus caninus(L.)L.,鹅观草Roegneria kamoji Ohwi,糙毛仲彬草K．hirsuta(Keng)J．L．Yang，Yen et Baum 3个种进行了杂交。对亲本及杂种F1代花粉母细胞减数分裂中期I染色体配对行为进行了观察。减数分裂平均构型分别为E.caninus×K.stenachyra23.79I+5.20II+0.27III;R.kamoji×K.stenachyra18.23I+11.68II+0.06III＋0.06IV；K.hirsuta×K.stenachyra4.83I+17.31II+0.55III+0.20lV＋0.02V。根据以上结果，结合种的形态特征，窄颖仲彬草应从鹅观草属Roegneria C.Koch 拟冰草组ParagropyronKeng中组合到仲彬草属Kengyilia Yen et yang。
Abstract:Kengyilia stenachyra is a hexaploid perennial plant in the tribe Triticeae native to west China. K.stenachyra was hybridized with Elymus caninus,Roegeneria kamoji and K.hirsuta. The chromosome pairing behavior at metaphase I in the parents and hybirds was observed. Meiotic configurations are 23.79I+5.20II+0.27III for E.caninus×K.stenachyra,18.23I+11.68II+0.06III＋0.06IV for R.kamoji×K.stenachyra,and 4.83I+17.31II+0.55III+0.20lV＋0.02V for K.hirsuta×K.stenachyra. Based on the chromosome pairing in the hybrids,and species morphology,K.stenachyra should be correctly grouped in Kengyilia rather than in Roegneria.