The male sterility(MS)line is a prerequisite for efficient production of hybrid seeds in rice,a self-pollinating *** line breeding is pivotal for hybrid rice *** the historical breeding tra-jectory will help to improv...
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The male sterility(MS)line is a prerequisite for efficient production of hybrid seeds in rice,a self-pollinating *** line breeding is pivotal for hybrid rice *** the historical breeding tra-jectory will help to improve hybrid rice breeding *** inherited cytoplasm is an appro-priate tool for phylogenetic reconstruction and pedigree tracing in rice *** this study,we analyzed the cytoplasmic genomes of 1495 elite hybrid rice varieties and identified five major types of cytoplasm,which correspond to different hybrid production *** the cytoplasm donors for hybrids,461 MS lines were also divided into five major types based on cytoplasmic and nuclear genomic ***-cific core accessions cooperating with different fertility-associated genes drove the sequence divergence of MS *** to hundreds of convergent and divergent selective sweeps spanning several agro-nomic trait-associated genes were identified among different types of MS *** further analyzed the cross patterns between different types of MS lines and their corresponding *** study system-atically analyzed the cytoplasmic genomes of rice hybrids revealed their relationships with nuclear ge-nomes of MS lines,and illustrated the trajectory of hybrid rice breeding and the strategies for breeding different types of MS lines providing new insights for future improvement of hybrid rice.
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