Diallel Analysis of Early Leaf Spot (Cercospora arachidicola Hori) Disease Resistance in Groundnut

Zongo, A and Konate, A and Koïta, K and Sawadogo, M and Sankara, P and Ntare, B and Desmae, H (2019) Diallel Analysis of Early Leaf Spot (Cercospora arachidicola Hori) Disease Resistance in Groundnut. Agronomy (TSI), 9(1) (15). pp. 1-12. ISSN 2073-4395

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Early leaf spot (ELS) is one of the major biotic constraints of groundnut production in West and Central Africa. A study using 6 × 6 F2 full diallel populations from six parents (NAMA, B188, PC79-79, QH243C, TS32-1, and CN94C) was conducted to assess the mode of inheritance of ELS resistance traits. The F2 and parents were grown in a randomized complete block design with three replications. Data was collected on ELS disease severity, and an area under disease progress curve (AUDPC) was estimated. The results revealed that additive and non-additive gene actions were involved in the inheritance of the ELS resistance traits, but additive gene action was predominant. Significant reciprocal cross effect was observed, suggesting cytoplasmic effect on ELS resistance. Graphical analysis also revealed the predominance of additive gene action for ELS resistance. The results suggest that early generation selection should be effective for ELS resistance. Looking at the distribution of array points along with the regression line, parental lines NAMA, PC79-79, and B188 would be suitable as good donors in an ELS disease resistance breeding program.

Item Type: Article
Divisions: Research Program : West & Central Africa
Uncontrolled Keywords: Early leaf spot, biotic constraint, groundnut production, West Africa, Central Africa, ELS disease severity, ELS disease resistance, breeding program, general combining ability, specific combining ability, diallel, groundnut
Subjects: Others > Biotic Stress
Others > Crop Improvement
Mandate crops > Groundnut
Others > African Agriculture
Others > Plant Disease
Depositing User: Mr Ramesh K
Date Deposited: 22 Jan 2019 09:25
Last Modified: 11 Mar 2019 05:49
URI: http://oar.icrisat.org/id/eprint/11043
Official URL: http://dx.doi.org/10.3390/agronomy9010015
Funders: Tropical Legume II (TL-II) of Bill and Melinda Gates Foundation (BMGF)
Acknowledgement: The authors are thankful to all the team of Groundnut Breeding program, ICRISAT-WCA, the team of Biosciences Laboratory, University Ouaga I Joseph Ki-Zerbo of Ouagadougou and Institute of Rural Development (IDR) of Nazi Boni University. Financial support from Tropical Legume II (TL-II) of Bill and Melinda Gates Foundation (BMGF), USA is duly acknowledged.
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