南方农业学报Issue(2)：194-198,5.DOI:10.3969/jissn.2095-1191.2015.2.194
近十年广西审定感光型杂交稻品种的主要病害抗性水平及育种方向分析
Main disease resistance and breeding tendency of photosensitive hybrid rice varieties registered in Guangxi during the past decade
摘要
Abstract
Objective]The present study were conducted to analyze the main diseases ’ resistance performance and developing trend of photosensitive hybrid rice varieties registered in Guangxi during the past decade , in order to provide references for disease resistance breeding. [Method]The resistance to rice blast and bacterial leaf blight of 100 photo-sensitive hybrid rice varieties , which were registered in Guangxi from 2003 to 2014 , were analyzed according to the data came from Guangxi rice regional trials . [Result]The results showed that , the average comprehensive resistance index of rice blast showed a decreasing tendency during the past decade; it ranged from 7.92-8.75 during 2003-2009 and 6.61-7.50 during 2010-2014, and the lowest one (6.61) was observed in 2012. There was no obvious improve-ment in resistance to bacterial leaf blight of 100 hybrid rice varieties during 2003-2014. The comprehensive index of resistance to Ⅳtype andⅤtype of Xanthomonas oryzae pv. Oryzae ranged from 6.33 to 7.75 and from 7.00 to 9.00, re-spectively. The index of Ⅳ type was lower than that of Ⅴtype in each year. Furthermore, 44 hybrid varieties were de-rived from male sterile line BoA combining with different restorers , which was account for 44%; while other 56 vari-eties were derived from 35 sterile lines , which was account for 56%. For rice blast , there were no significant differ-ences in resistance indices between the hybrids derived from BoA combinations and the other male sterile lines ’ combi-nations during 2003-2007, and all of them ranged from 8.00-8.75. While the resistance indices of hybrids derived from BoA combinations were higher than those of the other male sterile lines ’ combinations during 2009-2014. No sig-nificant differences were found in resistance to bacterial leaf blight between these hybrids derived from different combi-nations . [Conclusion]The resistance to rice blast of photosensitive hybrids registered in Guangxi improved gradually during the past decade , while no significant improvement was found in bacterial leaf blight. Therefore , the resistance breeding for rice blast should be strengthened in future. Meanwhile , more emphasis should be given on resistance breeding for bacterial leaf blight. It is important to enrich the genetic background of photosensitive hybrid rice for en-hancing disease resistance level in Guangxi rice breeding.关键词
杂交稻/稻瘟病/白叶枯病/感光型/抗病性育种/广西Key words
hybrid rice/rice blast/bacterial leaf blight/photosensitive type/disease resistance breeding/Guangxi分类
农业科技引用本文复制引用
莫海玲,唐梅,孙富,罗同平,潘文兴,于松保..近十年广西审定感光型杂交稻品种的主要病害抗性水平及育种方向分析[J].南方农业学报,2015,(2):194-198,5.基金项目
广西农业财政项目 （）
