【摘要】 对加拿大披碱草与老芒麦种间杂种F1的形态学和细胞学特征进行研究。结果表明,F1生长势明显超过双亲,穗型呈双亲中间型;杂种F1的体细胞染色体核型公式为2n=22m+6sm;F1为真杂种;F1花粉母细胞后期Ⅰ有落后染色体出现,落后染色体细胞频率达87.37%,减数分裂中期染色体配对紊乱,形成较多的棒状二价体。更多还原

【Abstract】 Morphologic and cytological characteristics of hybrid F1 between E.canadensis and E.sibiricus were studied.The results showed that hybrid F1 were obviously exceeded parents in plant growth vigor,and spike type of F1 was between parents.The karyotype formula of hybrid F1 which was true hybrid was 2n=22m+6sm.At meiotic anaphase,chromosome lagging behaviors were frequently observed.The frequency of lagging chromosomes of F1 was 87.37%.At meiotic metaphase,there were many univalents and multivalents,and the rod bivalent formed greatly.更多还原