TY - JOUR
T1 - A routine test for the relative susceptibility of potato genotypes with resistance to Meloidogyne chitwoodi
AU - Teklu, Misghina G.
AU - Schomaker, Corrie H.
AU - Been, Thomas H.
AU - Molendijk, Leendert P.G.
PY - 2016
Y1 - 2016
N2 - The population dynamics of Meloidogyne chitwoodi on eight potato genotypes was compared to the susceptible cv. Desiree in four glasshouse experiments. The initial nematode densities consisted of log series 2x , with −4 < x < 8. Seinhorst’s logistic model was fitted to the final population densities to estimate the parameters maximum multiplication rate (a), maximum population density
(M) and the ratios RSa, RSM and M/a. Average RSa and RSM of the seven resistant genotypes were smaller than 0.29%. The M/a ratios on six resistant genotypes and cv. Desiree were the same, 1.3, indicating Pi independence of RS. One genotype stood out with M/a = 8.6, whereby RSa < RSM. Both RS and M/a were unaffected by pot size or experimental conditions. Screening protocols at
Pi = 24 second-stage juveniles (g dry soil)−1 in 2 or 3 kg pots were evaluated for distinctiveness between the two genotype groups.
Based on the results, an optimal protocol for a routine resistance test is proposed.
AB - The population dynamics of Meloidogyne chitwoodi on eight potato genotypes was compared to the susceptible cv. Desiree in four glasshouse experiments. The initial nematode densities consisted of log series 2x , with −4 < x < 8. Seinhorst’s logistic model was fitted to the final population densities to estimate the parameters maximum multiplication rate (a), maximum population density
(M) and the ratios RSa, RSM and M/a. Average RSa and RSM of the seven resistant genotypes were smaller than 0.29%. The M/a ratios on six resistant genotypes and cv. Desiree were the same, 1.3, indicating Pi independence of RS. One genotype stood out with M/a = 8.6, whereby RSa < RSM. Both RS and M/a were unaffected by pot size or experimental conditions. Screening protocols at
Pi = 24 second-stage juveniles (g dry soil)−1 in 2 or 3 kg pots were evaluated for distinctiveness between the two genotype groups.
Based on the results, an optimal protocol for a routine resistance test is proposed.
U2 - 10.1163/15685411-00003016
DO - 10.1163/15685411-00003016
M3 - Article
VL - 18
SP - 1079
EP - 1094
JO - Nematology
JF - Nematology
SN - 1388-5545
IS - 9
ER -