云南作物资源特征特性及生态地理分布研究Ⅸ:稻白背飞虱抗性资源的多样性分布

Characteristic and Ecological Geographical Distribution of Crops Resources in Yunnan Ⅸ.Diversity distribution of rice resources with resistance to Sogatella furcifera

为进一步了解云南省稻白背飞虱抗性资源的多样性分布,采用GIS等技术分析2 149份云南地方稻种资源稻白背飞虱抗性多样性在不同气候类型和各类稻区中的表现。结果表明:稻白背飞虱抗性的表达离不开气候环境因素,其多样性富聚区在全省不同生态环境中均有分布,以滇西南和滇中较为丰富,籼粳稻交错区和种植环境丰富的区域是多样性的富聚区;不同气候带中的稻白背飞虱抗性多样性依次为中亚热带=南亚热带=南温带>北亚热带>北热带>中温带>北温带;稻白背飞虱抗性多样性随海拔升高和温度降低而减小、随海拔降低和温度升高而增大。发掘了87份有研究利用价值的优异稻白背飞虱抗源。

The diversity performance of 2149 rice resources in Yunnan with resistance to Sogatella furcifera in different climatic types and rice cultivation regions was analyzed by GIS technology to further understand diversity distribution of rice resources with resistance to S.furcifera in Yunnan.Result:The expression of rice resources with resistance to S.furcifera is related to environmental factors.The diversity enrichment region of rice resources with resistance to S.furcifera distributes in different ecological environments in Yunnan.The regions of Southwest Yunnan,Central Yunnan,Japonica and indica rice overlapping and abundant planting environment are diversity enrichment regions of rice resources with resistance to S.furcifera.The diversity of rice resources with resistance to S.furcifera in different climatic zones is Mid-subtropical zone=South subtropical zone=South temperature zone >Northern subtropical zone >North tropical zone >Middle temperature zone >North temperature zone.The diversity of rice resources with resistance to S.furcifera decreases with elevation rise and temperature reduction but increases with elevation reduction and temperature rise.87 identified rice resources with strong resistance to S.furcifera have the utilization value in breeding for insect resistance of rice varieties.