论文部分内容阅读
为明确30个水稻抗瘟基因品系在江西水稻育种中的应用价值,利用2006—2012年分离自江西主要稻区的381个稻瘟病菌株,在抗瘟基因品系苗期喷雾接种,通过供试品系对稻瘟病菌的抗感反应来明确其抗病性。Pi-zt、Pi-k、Pi-1(1)、Pi-z5、Pi-k(C)、Pi-kp和Pi-9(t)7个水稻抗瘟基因对江西省稻瘟病菌群体表现出较高的抗性频率,其值分别为85.11%、82.95%、71.12%、68.69%、63.53%、62.61%和61.09%,且这7个抗瘟基因对ZG1、ZC15和ZB31小种的稻瘟病菌株的抗性频率均比其它小种菌株高。将抗瘟品系与稻瘟病菌接种反应结果转化为“0-1”模式进行聚类分析,7个抗性频率较高的抗瘟基因被划分为Pi-zt、Pi-z5、Pi-9(t)和Pi-k、Pi-1(1)、Pi-k(C)、Pi-kp两组不同的抗病类型品系。
In order to clarify the application value of 30 rice blast resistance genotypes in rice breeding in Jiangxi Province, 381 blast strains isolated from major rice growing areas in Jiangxi Province from 2006 to 2012 were inoculated by spraying at the seedling stage of the blast resistant strain, Anti-flu response to Magnaporthe grisea to clarify its disease resistance. Seven Rice Blast Resistance Genes of Pi-zt, Pi-k, Pi-1 (1), Pi-z5, Pi-k (C), Pi-kp and Pi-9 The results showed that the seven resistance genes were resistant to ZG1, ZC15 and ZB31 races. The frequency of resistance was 85.11%, 82.95%, 71.12%, 68.69%, 63.53%, 62.61% and 61.09% Blast resistance strains were more resistant than other race strains. The results of the inoculation reaction of the blast resistant strains and Magnaporthe grisea into the “0-1 ” pattern were clustered. The seven blast resistance genes with high resistance frequency were divided into Pi-zt, Pi-z5, Pi- 9 (t) and Pi-k, Pi-1 (1), Pi-k (C) and Pi-kp.