Understanding the genetic basis of adaptive evolution following habitat expan-sion can have important implications for pest management.The pink rice borer(PRB),Sesamia inferens(Walker),is a destructive pest of rice th...Understanding the genetic basis of adaptive evolution following habitat expan-sion can have important implications for pest management.The pink rice borer(PRB),Sesamia inferens(Walker),is a destructive pest of rice that was historically restricted to regions south of 34o N latitude in China.However,with changes in global climate and farming practices,the distribution of this moth has progressively expanded,en-compassing most regions in North China.Here,3 highly differentiated subpopulations were discovered using high-quality single-nucleotide polymorphism and structural vari-ant datasets across China,corresponding to northern,southern China regions,and the Yunnan-Guizhou Plateau,with significant patterns of isolation by geographic and envi-ronmental distances.Our estimates of evolutionary history indicate asymmetric migration with varying population sizes across the 3 subpopulations.Selective sweep analyses esti-mated strong selection at insect cuticle glycine-rich cuticular protein genes which are as-sociated with enhanced desiccation adaptability in the northern group,and at the histone-lysine-N-methyltransferase gene associated with range expansion and local adaptation in the Shandong population.Our findings have significant implications for the development of effective strategies to control this pest.展开更多
基金This work was supported by STI 2030-Major Projects(2022ZD04021)Shenzhen Science and Technology Program(Grant No.KQTD20180411143628272)the Agricultural Science and Technology Innovation Program of Chinese Academy of Agricultural Sciences.
文摘Understanding the genetic basis of adaptive evolution following habitat expan-sion can have important implications for pest management.The pink rice borer(PRB),Sesamia inferens(Walker),is a destructive pest of rice that was historically restricted to regions south of 34o N latitude in China.However,with changes in global climate and farming practices,the distribution of this moth has progressively expanded,en-compassing most regions in North China.Here,3 highly differentiated subpopulations were discovered using high-quality single-nucleotide polymorphism and structural vari-ant datasets across China,corresponding to northern,southern China regions,and the Yunnan-Guizhou Plateau,with significant patterns of isolation by geographic and envi-ronmental distances.Our estimates of evolutionary history indicate asymmetric migration with varying population sizes across the 3 subpopulations.Selective sweep analyses esti-mated strong selection at insect cuticle glycine-rich cuticular protein genes which are as-sociated with enhanced desiccation adaptability in the northern group,and at the histone-lysine-N-methyltransferase gene associated with range expansion and local adaptation in the Shandong population.Our findings have significant implications for the development of effective strategies to control this pest.
