Identification and transfer of trait-enhancing alleles from wild species
2007
McCouch, S.R. | Sweeney, M. | Li, J. | Jiang, H. | Thomson, M. | Septiningsih, E. | Moncada, P. | Xiao, J. | Coburn, J. | Fraker, E. | Garris, A. | Tai, T. | Martinez, C. | Tohme, J. | Suguino, M. | McClung, A. | Yuan, L.P. | Ahn, S.N.
The approach demonstrated by this collaborative breeding project has had important implications for the use of exotic germplasm in wide crosses of rice. We demonstrated that AB-QTL analysis is capable of (1) successfully uncovering positive alleles that were not obvious based on the phenotype of the parent, (2) offering an estimation of the value of crosses between O. sativa and exotic or genetically distant germplasm, and (3) identifying molecular markers for numerous alleles of interest to aid in their incorporation into elite cultivars with a minimum of linkage drag. The project explored the distribution of diversity within and between subpopulations of rice, building on the unique evolutionary history of the species to explore the genetic architecture and combining ability of groups within and between species. The long-term potential of exploiting the well-partitioned gene space in rice depends on appropriate management of these gene pools and a sound intellectual framework within which the genetic variation of Oryza is explored and manipulated. It is of great interest to integrate knowledge about the evolution and natural population structure of this and other domesticated species to better manage and exploit natural variation for crop improvement.
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Este registro bibliográfico ha sido proporcionado por International Rice Research Institute