不同水(陆)稻品种(系)干旱胁迫效应分析评价

Comprehensive Evaluation of Different Paddy(Upland) Rice Varieties(Line) Under Drought Stress

为了扩大水稻抗旱资源的应用,提高水稻抗旱育种效率,对来自17个不同国家105份水(陆)稻品种(系)进行干旱胁迫效应评价。采用了同异分析法,在干旱胁迫下,株高、单株有效穗、穗长、每穗实粒数、每穗总粒数、结实率、千粒重、单株谷重8项农艺及经济性状,进行了综合评价分析。结果表明:105份水(陆)稻品种(系),分析评语"差"的有60个品种,占57.1%;"一般"的评语共有22个品种,占21%;"较好"和"好"的评语各有10个品种,占9.5%;"优良"的只有4个品种,占3.8%,分别为IR77298-14-1-2-13、IR77298-5-6-18、CACHO PRETO、IR77298-5-6-11,均为籼稻品种。由此得出,籼稻品种抗旱性明显高于粳稻品种,抗旱同异评语的级别与每穗实粒数、结实率、单株谷重3个性状密切相关。

In order to expand the application of rice-drought-resources,and improve rice-drought-resistancebreeding efficiency,this paper was comprehensive evaluation analysis of 105 materials,which paddy（upland）rice from 17 different countries.Under drought stress by identical-discrepant analysis method,8 agronomicwhich were plant height,panicles,panicle length,grains per panicle,each spike total grains,seed rate,grainweigh and grain weight per plant,and economic traits referred to a comprehensive evaluation and analysis.Theresults showed that there were 60“poor”varieties,accounting for 57.1%;22“general”varieties,accountingfor 21%;10“better”and“good”varieties,each accounting for 9.5%;“choiceness”only 4 varieties,accounting for 3.8%,such as,IR77298-14-1-2-13,IR77298-5-6-18,CACHO PRETO,IR77298-5-6-11,all varieties were indica rice.Indica rice varieties of drought resistance were significantly higher than japonicarice varieties,identical-discrepant comment with different levels of drought was closely related to 3 traits,which were grains per panicle,seed setting rate and grain weight per plant.