Plant Breeding (2017) 136, 759-766

Fulgencio Sánchez-Solana, Caridad Ros, María del Mar Guerrero, Victoriano Martínez, Carmen María Lacasa, Ana Hernández, Alain Palloix and Alfredo Lacasa (2017)
Effectiveness of quantitative resistance conferred by the genetic background of pepper in the control of root-knot nematodes and influence onto durability of Me1- and Me3-resistant genes in greenhouse conditions
Plant Breeding 136 (5), 759-766
Abstract: In pepper (Capsicum annuum), the major genes (R-genes) Me1 and Me3 confer resistance against root-knot nematodes (Meloidogyne spp.). The combination of R-genes and quantitative resistance factors in the same genotype is considered a good breeding strategy for increasing the durability of R-genes. To ascertain this hypothesis, five pepper inbred lines, differing in their quantitative resistance level, were combined with Me1 or Me3 genes in F₁ hybrids. The resistance of inbred lines and F₁ hybrids was evaluated in a greenhouse with soil naturally infected by M. incognita in two successive growing years. In both years, lines carrying Me3 were less infected by the nematode when combined with quantitative resistance. An increase in nematode infection was observed in the second growing year in lines carrying Me1 or Me3, independently of quantitative resistance. The infection level recorded in inbred lines without R-genes was similar in both years. The effectiveness of quantitative resistance controlling M. incognita is confirmed in greenhouse conditions, although the durability of Me1 and Me3 when combined with quantitative resistance factors was not seen to increase.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Alain Palloix

Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Meloidogyne incognita	Green pepper/chilli (Capsicum)