Characterization of root development in a segregating diploid banana population as a searching basis for resistance to Radopholus similis

Abstract: 
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).
Les nématodes, parasites des plantes, sont reconnus comme des parasites les plus dangereux de bananes bananes là où ils sont cultivés. Les nématodes se nourrissent, se multiplient et migrent à l’intérieur des racines des bananes, causant des nécrotiques et la réduction des systèmes racinaires. La résistance génétique aux nématodes fournit une option de gestion plus durable aux agriculteurs de maigres ressources. Traditionnellement, l’identification de la résistance et la tolérance des variétés de la banane aux nématodes dépendent de l’évaluation et de la reproduction des nématodes (histo) des enquêtes pathologiques. De nouvelles preuves indiquent qu’il existe l’effet de la croissance des racines sur les observations de la résistance. Nombre et la taille du système racine semblent être les facteurs essentiels de la tolérance aux nématodes de la banane, les plantes avec un nombre plus élevé des racines et / ou la vigueur sont moins affaiblis par les nématodes. La proportion de racines primaires, secondaires et tertiaires dans les bananes dépend de la variété (groupe de génome et le niveau de ploïdie).
Language: 
Date of publication: 
2010
Country: 
Region Focus: 
East Africa
University/affiliation: 
Collection: 
RUFORUM Conferences and Workshops
Licence conditions: 
Open Access
Access restriction: 
Form: 
Printed resource
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ISSN: 
E_ISSN: 
Edition: 
Extent: 
457-462
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About the RUFORUM 2010 Biennal Conference
"The 2010 RUFORUM Biennial Conference was the second in the series. The main objective of the Biennial conferences is to provide a platform for agricultural research for development stakeholders in Africa and beyond to actively exchange findings and experiences, while at the same time learning lessons towards improving performance of the agricultural sector and ultimately people’s livelihoods. The biennial conference is RUFORUM’s most comprehensive meeting for the diversity of stakeholders in agriculture. It is especially dedicated to graduate students and their supervisors, grantees in RUFORUM member universities and alumni. It is a platform for peer review, quality control, mentorship, networking and shared learning. This record contains an extended abstract accepted under the theme of Plant Breeding"