Genetics of resistance to groundnut rosette virus disease

Kayondo, S I and Rubaihayo, P R and Ntare, B R and Gibson, P T and Edema, R and Ozimzti, A and Okello, D K (2014) Genetics of resistance to groundnut rosette virus disease. African Crop Science Journal, 22 (1). pp. 21-29. ISSN 1021-9730

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Abstract

Groundnut Rosette Virus disease (GRD) has long been regarded a major limiting biotic constraint to groundnut production in Sub-Saharan Africa (SSA). The disease is caused by a complex of three viral components that interact in a synergistic fashion resulting into severe crop losses. A study was conducted to better understand the genetics of inheritance of GRD resistance. Nineteen groundnut genotypes among which twelve F2 families populations arising from a 3x4 North Carolina II mating design, were evaluated for their percentage disease severity (PDS) and incidence (PDI). There was significant genetic variability for resistance to GRD among the materials studied with more significant additive gene action as compared to non additive. However, since specific combining ability effects were not so consistent among the F2 family populations, evaluation and testing of progenies alongside with their parents would be more meaningful and selection in the early generations would be the most effective strategy. Further, narrow sense heritability of 53% suggests that prerformance of groundnut progenies could be partly predicted by both parental and individual cross means

Item Type:	Article
Divisions:	UNSPECIFIED
CRP:	UNSPECIFIED
Uncontrolled Keywords:	Arachis hypogaea, disease severity, inheritance, heritability
Subjects:	Mandate crops > Groundnut
Depositing User:	Ms K Syamalamba
Date Deposited:	11 Sep 2014 10:30
Last Modified:	11 Sep 2014 10:30
URI:	http://oar.icrisat.org/id/eprint/8301
Official URL:	http://www.bioline.org.br/titles?id=cs&year=2014&v...
Projects:	PASS project
Funders:	Alliance for Green Revolution in Africa (AGRA)
Acknowledgement:	UNSPECIFIED
Links:	Google Scholar

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