稻瘟病、细菌性叶枯病和抗旱水稻品系多性状的遗传遗传

M. Yusop
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引用次数: 3

摘要

水稻(Oryza sativa L.)是世界上一半以上人口的谷物和主要粮食作物。稻瘟病、细菌性叶枯病和干旱胁迫对水稻产量的影响很大,损失幅度为1-100%,具体取决于病害的严重程度和缺水状况。选用抗、耐稻瘟病高产品种Putra1和抗旱高产品种MR219 IR99784-156-137-1-3和细菌叶枯病品种IRBB60。研究考虑了新改良品系的遗传及其相互作用。采用家系育种方法,通过标记辅助选择,培育出单、双、三向(和互惠)杂交组合。利用Southern blot分析确定抗性/耐受性基因/ qtl的渗入和选择是否成功,并通过表型结果进行验证。对不同居群的农业形态和产量参数进行了分析。结果表明,非干旱胁迫(NS)和生殖干旱胁迫(RS)处理之间及其相互作用水平存在显著差异。在NS处理下,亲本和改良系在某些性状上存在显著差异,但RS对DF、FFG、YM,尤其是易感亲本的参数影响显著,而改良系则具有耐受性。处理与品种(Trt*Var.)在PL、T、FFG和GLW上存在显著交互作用(P≤0.05)。聚类分析和主成分分析表明,单交、双交和三交(或互交)组合均能获得较好的品系。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Genetic inheritance of multiple traits of blast, bacteria leaf blight resistant and drought tolerant rice lines
Rice ( Oryza sativa  L.) is a cereal and staple food crop of over half of the world’s population. Blast, bacteria leaf blight and drought stresses affect yield of rice drastically ranging from 1-100% loss depending on the severity of disease and water deficit condition. Resistance and tolerance high yielding varieties of blast (Putra1) and drought (MR219 IR99784-156-137-1-3) respectively and also IRBB60 (bacteria leaf blight) were used. The research considered the genetic inheritance of the new improved lines and their interactions. Pedigree breeding method was used to develop two single, double and three-way (and reciprocal) crosses through marker-assisted selection. Southern blot analysis was used to determine success of introgression of resistance/tolerance genes/QTLs and selection, also validated by phenotyped results. Agro-morphological and yield parameters of the various populations were analysed. The results indicated levels of significant differences amongst and between treatments for non-drought stress (NS) and reproductive drought stress (RS) and their interactions. There were significant variation among parents and improved lines on some traits in NS treatment, but RS significantly affected parameters of DF, FFG, YM and most especially the susceptible parent, while the improved lines were tolerant.  Significant interactions was recorded (P≤0.05) between treatment and variety (Trt*Var.) on PL, T, FFG and GLW. Cluster analysis and PCA of relationship among the 9 traits in the two treatments revealed that each of single, double and three-way (and reciprocal) crosses had good lines either under NS and RS.
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