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Please use this identifier to cite or link to this item: http://hdl.handle.net/1807/23845


Title: Yield evaluation and stability analysis in newly selected 'KSA' cotton cultivars in western Kenya
Issue Date: 31-Dec-1997
Publisher: African Crop Science Society
Citation: African Crop Science Journal (ISSN: 1021-9730) Vol 5 Num 2
Abstract: African Crop Science Journal Vol.5. No.2, pp. 119-125, 1997 Yield evaluation and stability analysis in newly selected 'KSA' cotton cultivars in western Kenya R. M. OPONDO and G. A. OMBAKHO Code Number: CS97018 Sizes of Files: Text: 26.1K Graphics: No associated graphics files ABSTRACT Performance for seed cotton and lint yields, lint percentage, and days to 50% boll opening of nine cultivars and strains of cotton (Gossypium hirsutum L.) was evaluated across 21 environments in Western Kenya during 1981 through 1986. The objectives of the study were to assess improvement in yield by selection and examine adaptability and stability for seed cotton yield. Two introduced, REBA B50 and HARNA(73)44, one obsolete, BPA68, and two commercial cultivars, UKA59/240 and BPA75, three strains, KSA20, KSA153 and KSA112, selected from UKA59/240, and one multiline of the strains KSA81M were chosen for evaluation at six locations over the years. Genotypic and environmental effects were highly significant (P{0.01) for all the traits studied. Genotype X environment interaction effects were highly significant for seed cotton and lint yields. Seed cotton yields ranged from 1389 to 1559 kg ha^-1, with the strains and multiline demonstrating superiority over the commercial variety they were selected from in seed cotton and lint yields. Stability analysis for seed cotton yield indicated linearity for a considerable portion of genotype X environment interaction effects as evidenced by high significance of the linear component of the interaction. Estimates of parameters describing stability found the multiline to be most stable, and widely adaptable to cotton growing areas of western Kenya. Key Words: Adaptability, Earliness of maturity, Genotype X environment, Gossypium hirsutum L., lint percentage, lint yield, multiline, selection, seed cotton yield, stability RESUME La performance du coton a graines et des produits a peluche, le pourcentage de la peluche, et les jours marques par 50% d'ouverture des capsules de neuf cultivars et des varietes de coton (Gossypium hirsutum L.) ont ete evalue dans 21 milieux differents de l'ouest du Kenya de 1981 a 1986. L'objectif de cette etude etait, d'une part, d'evaluer l'amelioration la production du coton a graines par la selection et, d'autre part, d'examiner son adaptabilite et sa stabilite. Deux varietes introduites, REBA B50 et HARNA(73)44, une ancienne variete BPA68, deux cultivars commerciaux UKA59/240 et BPA75, trois varietes KSA20, KSA153 et KSA112, selectionnees a partir de UKA59/240, et beaucoup de varietes KSA81M ont ete choisies pour cette evaluation dans six endroits differents sur plusieurs annees. Les facteurs du genotype et du milieu ont revele des effets hautement significatifs (P{0.01) pour tous les caracteres etudies. Les effets de l'interaction du milieu sur le genotype x se sont averes hautement significatifs pour le coton a graines et les produits a base de peluche. La production du coton a base de peluche. La production du coton a graines, y compis celle des varietes et de plusieurs lignees, etait comprise entre 1389 et 1559 kg ha^-1. De telles valeurs demontrent leur superiorite par rapport a la variete commerciale a partir de lonquelle elles ont ete selectionnees. L'analyse de la stabilite de la production du coton a graines indique le caractere lineaire d'une bonne partie des effets du milieu du genotype x. Ceci est mis en evidence par l'importance considerable de la composante lineaire de l'interaction. Les estimations des parametres descriptifs de la stabilite ont prouve que la multilignee etait beoucoup plus stable, et hautement adaptable au coton cultive a l'ouest du Kenya. Mots Cles: Adaptabilite, maturite precoce, milieu du genotype x, Gossypium hirsutum L., pourcentage de la peluche, production de la peluche, multilignee, selection, production du coton a graines, stabilite Copyright 1997 The African Crop Science Society
URI: http://hdl.handle.net/1807/23845
Other Identifiers: http://www.bioline.org.br/abstract?id=cs97018
Rights: Copyright 1997 African Crop Science Society
Appears in Collections:Bioline International Legacy Collection

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