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Position: Home > Articles > THE STUDY ON THE ASEFULNESS OF LR GENES IN BREEDING WHEAT FOR RESISTANCE TO LEAF RUST IN HEBEI Acta Phytopathologica Sinica 1993 (1)

40个Lr基因在河北省抗病育种中的可用性研究

作  者:
郭爱国;赤国彤;王焕如;朱之堉
单  位:
河北农业大学植保系
摘  要:
本试验采用相对严重度的比较方法,对40个Lr基因系(品种)在河北省抗病育种中的可用性进行了研究。结果表明,Lr2d,Lr3等7个基因的相对严重度值高于82.35%,对叶锈病的抗性很差。Lr9,Lr19等7个基因抗性虽强,但能否转育在我国生产中应用不得而知。Lr1,Lr2a,Lr26等16个基因的相对严重度值为19 03—74.74%,在我国不少品种中已含有其中许多基因,它们的利用价值值得进一步研究。遗传背景对某些基因的表达有很大影响,在利用已知基因来推导品种中的未知基因以及在基因的转育时都要考虑到遗传背景的复杂性。基因组合可以提高对叶锈菌群体的抗性,应加强对基因间相互作用的研究。本研究根据已知基因在我国小麦品种中存在的情况,各基因的抗性效应,抗性类型以及对温度的敏感性等性状进行了综合分析,提出可考虑用Lr1,Lr2a,Lr2c,Lr3Bg,Lr10,Lr14ab,Lr15,Lr17,Lr21,Lr23,Lr26和Lr30等12个基因系作为叶锈菌的鉴别寄主,使我国叶锈菌生理分化研究能逐渐以基因鉴定代替小种鉴定。
译  名:
THE STUDY ON THE ASEFULNESS OF LR GENES IN BREEDING WHEAT FOR RESISTANCE TO LEAF RUST IN HEBEI
作  者:
Guo Aiguo,Chi Guotong,Hang Huangru,Zhu Zhiyu(Dept.of Plant Prot.,Bebei Agri.Univ.,Baoding,China)
摘  要:
The usefulness of 40 Lr gene lines in wheat brecding for resitance toleaf rust was studied by comparing the relative severity with the sus ceptiblecheck in Helei Proviuce. The relative severity of 7 Lr gene lines,such as Lr2d,Lr3,etc,wasMore than 82.35% and was considered to be highly susceptible,The relativeseverity of Lr gene lines,such as Lr9,Lr19,etc,was less than 16.61%.Their usefulness after being transferred to other cultivars remains to be seenThe relative severity of the other 16 gene lines,such as Lr1,Lr26,etc,was19.03—74.74%.These genes haue been found to be Present in current Chinesecultivars.Their usefulness in resisting the rust also remains to be seen. The results also showed that the genetic background of a variety affectedThe expression of some gehes and suitable gene combination enhanced theresistance to rust. Integral analysis of the presence of Lr genes in Chinese cultivarsy,thetype of resistance,virulence frequency relative severity,and sensitivity totemperature of Lr genes were tested.12 Lr genes have heen preliminarilysuggested to be the differential hosts,so that race determination by traditional method may be gradually displaced by gene determination.

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