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Cotton nematode resistance markers found

USDA Agricultural Research Service researchers have identified markers for genes in upland and wild cotton conferring resistance to two pests, root-knot nematodes ( Meloidogyne incognita) and reniform nematodes ( Rotylenchulus reniformis), respectively. Two genetic loci, on separate chromosomes in upland cotton, are associated with resistance to root knot nematodes, and a further two loci with resistance to reniform nematodes in wild cotton ( Gossypium barbadense). Identification of the marker genes should help breeders develop new varieties of nematode-resistant cotton, the researchers point out. Details of the study have been published in the journal, Theoretical and Applied Genetics.

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