Euphytica (2015) 206, 77-87

Frank Kagoda, Sarah Hearne, Omowumi Adewuyi and Daniel L. Coyne (2015)
Response of drought tolerant maize inbreds to water stress under nematode infested conditions
Euphytica 206 (1), 77-87
Abstract: Maize is the most important cereal food crop is sub-Saharan Africa though yields are below their potential. Among the factors which limit yield, drought stress is one of the most pervasive. The ability of a crop to produce grain under drought (water) stress is governed by many factors including nematodes. The aim of the current study was to determine the response of drought tolerant maize inbreds to nematode attack, understand the interaction between nematode infestation and water stress on maize growth and yield. The study comprised three factors: optimal irrigation against water stress, five nematode treatment conditions and ten maize inbreds. Results showed irrigation option × genotype interaction to significantly affect growth of the maize crop from 6 weeks after planting. Water stress favoured the reproduction of lesion nematodes (Pratylenchus zeae), 50 times more than root knot nematodes (Meloidogyne incognita), which showed an increase in most inbreds only under optimal irrigation. Inbreds ACR.SYN-W, La Posta Seq. C7, TZL Comp1C4 and 5057 displayed resistance to P. zeae and M. incognita under water stress, although cob dry weights were low for TZL Comp1C4 and 5057. Inbreds BMB23, DTPL-W-C7 and TZEI1 displayed tolerance to P. zeae and M. incognita under water stress. Overall, there is a high possibility of extracting desired genetic combination for P. zeae/M. incognita resistant and drought tolerant genes from inbreds ACR.SYN-W and La Posta Seq. C7.
(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): Daniel L. Coyne

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	Maize/corn (Zea mays)	Nigeria
	Pratylenchus zeae	Maize/corn (Zea mays)	Nigeria