Inheritance of resistance to coffee wilt disease (Fusarium xylarioides Steyaert) in Robusta coffee (Coffea canephora Pierre) and breeding perspectives

Inheritance of resistance to coffee wilt disease (Fusarium xylarioides Steyaert) in Robusta coffee (Coffea canephora Pierre) and breeding perspectives

Knowledge on heritability is essential for selecting varieties resistant against coffee wilt disease caused by Fusarium xylarioides , which is currently devastating coffee in East and Central Africa. Variability of the resistance against coffee wilt disease in Coffea canephora and its inheritance we...

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Published in:Tree genetics & genomes Vol. 9; no. 2; pp. 351 - 360
Main Authors: Musoli, Pascal C., Cilas, Christian, Pot, David, Nabaggala, Agnes, Nakendo, Saleh, Pande, James, Charrier, André, Leroy, Thierry, Bieysse, Daniel
Format: Journal Article
Language:English
Published: Berlin/Heidelberg Springer-Verlag 01-04-2013
Springer Nature B.V
Subjects:
Biomedical and Life Sciences
Biotechnology
Breeding
Cloning
Coffea
Coffee
Combining ability
Experiments
Forestry
Fusarium
Genetic diversity
Genetic improvement
Genomes
Heredity
Heritability
Houses
Inheritances
Life Sciences
Mortality
Original Paper
Pathogens
Plant Breeding/Biotechnology
Plant Genetics and Genomics
Polygenic inheritance
Progeny
Quantitative genetics
R&D
Research & development
Specialty products
Tree Biology
Trees
Wilt
Central Africa
France
Uganda
Partial resistance
Wilt disease
Heritability
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Summary:Knowledge on heritability is essential for selecting varieties resistant against coffee wilt disease caused by Fusarium xylarioides , which is currently devastating coffee in East and Central Africa. Variability of the resistance against coffee wilt disease in Coffea canephora and its inheritance were investigated in three experiments corresponding to a clonal trial involving 20 clones, a 10-parent partial diallel progeny, and a half-sib progeny test. There were significant quantitative genetic variations among the clones and progenies, suggesting polygenic control of the resistance. Around 50–65 % tree mortality was the optimal disease level for calculating heritability and genetic gains. General and specific combining abilities calculated within the optimal disease range for partial diallel analysis were significant. Broad-sense heritability for the same analysis and same disease range was moderate (0.329), and corresponding narrow-sense heritability was low (0.112). Broad-sense heritability from clones in the field at the same disease range was also moderate (0.333). Narrow-sense heritability from regression of half-sib progeny means onto parent means in the field and screen house was 0.183 and 0.369, respectively. Selecting tolerant clones for improvement against the disease is possible, and genetic gains are possible by using tolerant parents in breeding programs.
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ISSN:1614-2942
1614-2950
DOI:10.1007/s11295-012-0557-9