Sixty years of breeding in Cameroon improved fibre but not seed cotton yield

Loison Romain, Audebert Alain, Chopart Jean-Louis, Debaeke Philippe, Dessauw Dominique, Gourlot Jean-Paul, Gozé Eric, Jean Janine, Gérardeaux Edward. 2017. Sixty years of breeding in Cameroon improved fibre but not seed cotton yield. Experimental Agriculture, 53 (2) : 202-209.

https://doi.org/10.1017/S0014479716000302

Article de revue ; Article de recherche ; Article de revue à facteur d'impact

Version publiée - Anglais
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Loison et al. - 2017 - Experimental Agriculture - Sixty years of breeding in Cameroon improved fibre but not seed cotton yield.pdf
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Quartile : Q2, Sujet : AGRONOMY

Résumé : Seed cotton yield in Northern Cameroon has been declining since the 80s despite breeding efforts. In order to evaluate the impact of genetic improvement on this decline, we conducted field experiments in two locations with 10 widely grown cotton cultivars released in Cameroon between 1950 and 2009. The rate of genetic gain (GG) was estimated with a linear regression of the cultivar mean on its year of release (YR). Contrasts between rates of GG observed with different planting dates were estimated and tested. Our results revealed a rate of GG on fibre yield of 3.3 kg ha−1 year−1 due to increased ginning out-turn (3.9% and 6.2% in 60 years in Garoua and Maroua, respectively). There was no GG on leaf area index (LAI), radiation use efficiency (RUE), aerial biomass, harvest index and on seed cotton yield. We concluded that cotton breeding efforts in Cameroon have successfully improved cotton fibre yield but there is still some room for seed cotton yield improvement.

Mots-clés Agrovoc : Gossypium

Mots-clés géographiques Agrovoc : Cameroun

Classification Agris : F30 - Génétique et amélioration des plantes
F01 - Culture des plantes

Champ stratégique Cirad : Axe 1 (2014-2018) - Agriculture écologiquement intensive

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