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ARS Home » Southeast Area » Tifton, Georgia » Crop Protection and Management Research » Research » Publications at this Location » Publication #139496
Title: REPRODUCTION OF MELOIDOGYNE SPP. ON RESISTANT PEANUT GENOTYPES FROM THREE BREEDING PROGRAMS

Author
item Timper, Patricia - Patty
item Holbrook, Carl - Corley
item ANDERSON, W - AGRATECH SEEDS

Submitted to: Journal of Nematology
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 6/25/2003
Publication Date: 12/1/2003
Citation: Timper, P., Holbrook, C.C., Anderson, W.F. 2003. Reproduction of Meloidogyne spp. on resistant peanut genotypes from three breeding programs. Journal of Nematology. 35(4):417-421.

Interpretive Summary: Three species of root-knot nematode parasitize peanut: the peanut root-knot nematode (PRN), the northern root-knot nematode (NRN), and the Javanese root-knot nematode (JRN). Peanut cultivars with broad resistance to root-knot nematodes will be useful regardless of the species present in the field. The objective of this study was to determine whether peanut genotypes with resistance to PRN originating from three different breeding programs were also resistant to NRN and JRN. The five peanut genotypes were 'COAN' and AT 0812 which are highly resistant, C209-6-13 which is moderately resistant, and 'Southern Runner' and 'Georgia Green' which are susceptible to PRN. The four nematode populations were PRN Gibbs and GOP isolates, NRN, and JRN. Nematode reproduction was greatest on 'Georgia Green' and 'Southern Runner', intermediate on C209-6-13, and least on 'COAN' and AT 0812. The three nematode species (PRN, NRN, and JRN) did not vary in their ability to reproduce on 'COAN' or AT 0812, all produced less than 10% of the eggs produced on 'Georgia Green'. Reproduction of the three nematode species on C209-6-13 was more variable: most of the species produced less than 50% of the eggs produced on 'Georgia Green', the exception being the GOP isolate of PRN which produced 67% of the eggs produced on 'Georgia Green' in one of two trials. This is the first report of resistance to NRN in 'COAN', and resistance to NRN and JRN in the genotypes AT 0812 and C209-6-13.

Technical Abstract: Three described species of root-knot nematode parasitize peanut (Arachis hypogaea): Meloidogyne arenaria race 1, M. hapla, and M. javanica. Peanut cultivars with broad resistance to Meloidogyne spp. will be useful regardless of the species present in the field. The objective of this study was to determine whether peanut genotypes with resistance to M. arenaria (Ma) originating from three different breeding programs were also resistant to M. hapla (Mh) and M. javanica (Mj). The experiment utilized a factorial arrangement (completely randomized) with peanut genotype and nematode population as the factors. The five peanut genotypes were 'COAN' and AT 0812 which are highly resistant, C209-6-13 which is moderately resistant, and 'Southern Runner' and 'Georgia Green' which are susceptible to Ma. The four nematode populations were Ma Gibbs and GOP isolates, Mh, and Mj. Nematode reproduction was greatest on 'Georgia Green' and 'Southern Runner', intermediate on C209-6-13, and least on 'COAN' and AT 0812. The three nematode species (Ma, Mh, and Mj) did not vary in their ability to reproduce on 'COAN' or AT 0812, all produced <10% of the eggs produced on 'Georgia Green'. Reproduction of the three nematode species on C209-6-13 was more variable: most of the species produced <50% of the eggs produced on 'Georgia Green', the exception being the GOP isolate of Ma which produced 67% of the eggs produced on 'Georgia Green' in one of two trials. This is the first report of resistance to Mh in 'COAN', and resistance to Mh and Mj in the genotypes AT 0812 and C209-6-13.