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Agronomy 2017, 7(3), 52; doi:10.3390/agronomy7030052

Variability and Correlations among Groundnut Populations for Early Leaf Spot, Pod Yield, and Agronomic Traits

1
International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), BP 320 Bamako, Mali
2
Life and Earth Sciences Department, University Ouaga I Pr. Joseph Ki-Zerbo, BP 7021 Ouagadougou, Burkina Faso
3
Institut de l’Environnementet de Recherches Agricoles (INERA), BP 910 Bobo-Dioulasso, Burkina Faso
*
Author to whom correspondence should be addressed.
Academic Editor: Jacqueline Batley
Received: 9 May 2017 / Revised: 27 July 2017 / Accepted: 28 July 2017 / Published: 5 August 2017
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Abstract

The present experiment was conducted in Mali to study the genetic variability and correlation of early leaf spot (ELS) resistance parameters and agro-morphological traits in groundnut using two F3 populations from crosses QH243C X NAMA and TS32-1 X NAMA. Estimates of genotypic coefficient of variation and phenotypic coefficient of variation revealed high value for pod yield, kernel yield, and ELS score at 60 and 80 days after sowing for the cross QH243C X NAMA. Low-to-moderate GCV and PCV were obtained for the remaining traits for both crosses. High heritability values coupled with high genetic advance as percentage of mean recorded for ELS_II, defoliation percent, pod yield in cross QH243C X NAMA; shelling percent for the cross TS32-1 X NAMA and ELS_III; and plant height, kernel yield in both crosses, indicate the significant role of additive gene action for inheritance of these traits. Correlation analysis indicated that pod and kernel yield were significant and positively correlated with 100 kernel weight and shelling percent. For cross QH243C X NAMA, kernel yield showed significant positive correlation with all ELS resistance components but the correlation was not significant for the cross TS32-1 X NAMA. Positive and significant correlation was observed between ELS resistance components themselves, suggesting that these components could be controlled by a similar polygenic system. The findings suggest that early generation selection should be effective for days to first flowering, days to 50% flowering, plant height, pod yield, kernel yield, 100 kernel weight and early leaf spot resistance which recorded the highest value of heritability in the two crosses. View Full-Text
Keywords: genetic variability; correlation; agronomical traits; early leaf spot; groundnut genetic variability; correlation; agronomical traits; early leaf spot; groundnut
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Zongo, A.; Nana, A.T.; Sawadogo, M.; Konate, A.K.; Sankara, P.; Ntare, B.R.; Desmae, H. Variability and Correlations among Groundnut Populations for Early Leaf Spot, Pod Yield, and Agronomic Traits. Agronomy 2017, 7, 52.

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