摘要
【目的】水稻品种类型具有多样性和复杂性,科学、合理和准确地评价品种的优良种性对筛选优良品种和应用推广具有十分重要的意义。利用广东省5年的常规水稻品种区域试验数据,对广东省稻瘟病抗性品种的选育及抗稻瘟病种资源的利用进行分析。【方法】利用2011-2115年广东省参与区域试验的早晚造水稻品种稻瘟病抗性鉴定结果,分析149个水稻品种的稻瘟病抗性及抗性品种的抗源亲本,探究近年来广东省参试品种的抗稻瘟病特性。【结果】通过数据结果分析,发现149个品种中抗稻瘟病达到抗级以上的品种共84个,占比56.4%,感病以下的品种共22个,占比14.8%,感病以上抗级以下的品种共43个,占比28.9%。表明近年来广东省审定的品种大多具有抗稻瘟病特性,各育种单位越来越重视稻瘟病抗性育种和抗稻瘟病种质资源的利用。从稻瘟病的抗性来源分析,28占和青六矮1号是2个主要的稻瘟病抗源亲本,其衍生出常规稻新品种达42个,占抗稻瘟病品种的77.8%,成为广东省常规水稻抗稻瘟病育种的两大抗源。【结论】通过抗稻瘟病品种的抗源分析,说明选择合适的抗源亲本对培育抗稻瘟病新品种十分重要。
【Objective】The types of rice varieties are diverse and complex.Scientific,reasonable,and accurate evaluation of the good rice varieties is of great significance for the selection of excellent varieties and their application and promotion.The data from five-years regional trials of conventional rice varieties in Guangdong Province was used to analyze the selection of varieties resistant to rice blasts and the use of resistance sources of rice blasts in Guangdong province.【Method】The identification results of resistance to rice blast in early and late rice varieties that participated in regional trials in Guangdong Province from 2011 to 2115 were used,and the resistance of 149 rice varieties and parents of resistant varieties were analyzed to explore the resistance characteristics of tested varieties to rice blast in Guangdong.【Result】According to the data results,it was found that among 149 varieties,84 varieties had resistance to rice blasts above resistance level,a proportion of 56.4%,and 22 varieties were lower than susceptible level,accounting for about 14.8%.There were a total of 43 varieties above susceptible level as well as lower than resistance level,accounting for 28.9%.It shows that,in recent years,most of the varieties approved in Guangdong province have resistance to rice blast,and breeding units are paying more attention to rice blast resistance breeding and the use of germplasm resources resistant to rice blast.From the analysis on the resistance source of rice blast,28 Zhan and Qingliu’ai 1 are the two main rice blast resistant parents,which have derived up to 42 new rice varieties,accounting for 77.8% of the rice blast resistant varieties.They have become two major resistance sources for the breeding of conventional rice resistant to rice blast in Guangdong Province.【Conclusion】According to the analysis on resistance sources of rice blast resistance cultivars,it shows that the selection of appropriate parents is very important for breeding new varieties resistant to rice blast.
作者
钟春燕
孟醒
王茂辉
任勇
邓沛飞
陈志强
ZHONG Chunyan;MENG Xing;WANG Maohui;REN Yong;DENG Peifei;CHEN Zhiqiang(Zhaoqing Institute of Agricultural Sciences,Zhaoqing 526070,China;National Engineering Research Center of Plant Space Breeding,South China Agricultual University,Guangzhou 510642,China)
出处
《广东农业科学》
CAS
2020年第2期102-109,共8页
Guangdong Agricultural Sciences
关键词
水稻
区域试验
品种选育
稻瘟病
抗源
rice
regional trial
variety selection
rice blast
resistance
