水稻东野1号苗期耐冷性遗传分析

Study on the Cold Tolerance Inheritance of the Rice Variety Dongye No.1 in Seedling Stage

从东乡野生稻转育而来的粳稻品种东野1号具有很强的耐冷性。对以东野1号与弱耐冷粳稻和籼稻品种配置的赣早籼49/东野1号和粳稻0298/东野1号的杂交后代进行了苗期耐冷性遗传研究。结果表明,东野1号在幼苗3叶期强耐冷性遗传属于加性-显性遗传模型,基因效应为加性和显性效应,受1对细胞核显性基因所控制;耐冷性遗传表现为超亲优势;用东野1号作轮回亲本,回交1代的耐冷性比亲本东野1号的耐冷性更强。因此,在以东野1号为耐冷基因供体与籼稻杂交后代的耐冷遗传育种研究中,很有可能选育到耐冷性强的籼稻品种。

Dongye No.1 ,a perennial japonica variety with strong cold tolerance ,was derived from Dongxiang wild rice. The studies study on the cold tolerance inheritance of Dongye No.1 in the seedling stage was conducted by means of the progenies of crosses between Dongye No.1 and the two rice varieties with weaker cold tolerance such of Ganzaoxian-49 and Jingdao-0298. The results showed that the cold tolerance inheritance of Dongye No.1 belonged to the additive-dominant model in three-leaf stage,and governed by one pair of dominant nuclear genes. The cold tolerance in F1 hybrids was exceeded its parents. The cold tolerance of the first backcrosses was stronger than Dongye No.1 when it was used as the recurrent parent. Therefore,it is possible to develop strong cold tolerant indica varieties from the progenies of the crosses between Dongye No. 1 and indica varieties.