Characterization of root development in a segregating diploid banana population as a searching basis for resistance to Radopholus similis
Abstract
121 words
Plant parasitic nematodes are recognised as the most serious
pests of bananas wherever they are grown. Nematodes feed,
multiply and migrate inside banana roots causing necrotic and
reduced root systems. Genetic resistance to nematodes provides
a more sustainable management option to poor-resource
farmers. Traditionally, identifying resistance/tolerance of banana
varieties to nematodes depends on evaluating nematode
reproduction and (histo)pathological investigations. New
evidence indicates that there is an effect of root growth
characteristics on resistance observations. Number and root
system size seem to be the critical factors in banana tolerance
to nematodes; plants with higher root numbers and/or vigour
are less debilitated by nematodes. The proportion of primary,
secondary and tertiary roots in bananas depends on the variety
(genome group and ploidy level).
Subjects
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