Wild species in crop improvement
1984
Moss, J.P.
Wild relatives are useful sources of characters desired in crop improvement. Many related species are resistant to pests and diseases, or adapted to adverse environments. They can also contribute to yield increases. Genes introduced from some wild relatives can undergo meiotic recombination, producing segregants from which the plant breeder can select improved types, these genes can usually function effectively in cultivars. The limit of utilization of wild relatives depends on the ability to produce hybrids by means available to the breeder, but hybrids may be sterile. Ploidy differences are frequent between crops and wild relatives, but manipulation of ploidy level can improve gene transfer. Triploids are often sterile, but progeny from triploids includes recombinants that may not occur at other ploidy levels
显示更多 [+] 显示较少 [-]