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Genotype X environment (G X E) interaction and stability of CIMMYT quality protein maize (QPM) populations in Ethiopia

By: Wolde, L | Centro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico DF (Mexico).
Contributor(s): CIMMYT | Keneni, G [coaut.] | Tolessa, B [coaut.] | Worku, M [coaut.].
Material type: materialTypeLabelBookAnalytics: Show analyticsPublisher: Addis Ababa (Ethiopia) CIMMYT|EARO : 1999Description: p. 86-88.ISBN: 92-9146-065-6.Subject(s): Ethiopia | Genotype environment interaction AGROVOC | Maize | Protein quality AGROVOC | Stability | Varieties | CIMMYT | Zea mays AGROVOC | Genotypes AGROVOCDDC classification: 633.15 Summary: Where environmental differences are great, as occurs in Ethiopia it may be expected that the G X E interaction will also be great, and as a result, it is not only the average performance that is important in variety evaluation programs but also the magnitude of the G X E interaction and the stability of genotypes across environments. Therefore, G X E interaction and stability analyses of CIMMYT QPM Populations grown under six mid and one low altitude environments of Ethiopia were made to study the nature of adaptability of the genotypes. Pooled analysis of variance showed that the G X E interaction was highly significant for grain yield. This indicated the adaptability of some genotypes to specific environments and the importance of early multi- environmental evaluation in breeding programs. Stability analysis showed that five populations (S91 SIW, S91 SIY, POB 63 TLWD-1, POB 64 TLWD-2 and POB 65 TLYF) gave reasonable grain yields (51-57 q/ha) but these were lower than the checks and they were fairly stable. It is advisable that more materials should be introduced/developed and evaluated to select superior and more stable varieties.Collection: CIMMYT Publications Collection
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Item type Current location Collection Call number Copy number Status Date due Barcode Item holds
Conference proceedings CIMMYT Knowledge Center: John Woolston Library

Lic. Jose Juan Caballero Flores

 

CIMMYT Publications Collection 633.15 EAS No. 6 (Browse shelf) 1 Available S649283
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Where environmental differences are great, as occurs in Ethiopia it may be expected that the G X E interaction will also be great, and as a result, it is not only the average performance that is important in variety evaluation programs but also the magnitude of the G X E interaction and the stability of genotypes across environments. Therefore, G X E interaction and stability analyses of CIMMYT QPM Populations grown under six mid and one low altitude environments of Ethiopia were made to study the nature of adaptability of the genotypes. Pooled analysis of variance showed that the G X E interaction was highly significant for grain yield. This indicated the adaptability of some genotypes to specific environments and the importance of early multi- environmental evaluation in breeding programs. Stability analysis showed that five populations (S91 SIW, S91 SIY, POB 63 TLWD-1, POB 64 TLWD-2 and POB 65 TLYF) gave reasonable grain yields (51-57 q/ha) but these were lower than the checks and they were fairly stable. It is advisable that more materials should be introduced/developed and evaluated to select superior and more stable varieties.

English

0103|AL-Maize Program|AGRIS 0102|AJ

CIMMYT Publications Collection

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Si tiene cualquier pregunta, contáctenos a CIMMYT-Knowledge-Center@cgiar.org