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High yielding spring bread wheat germplasm for global irrigated and rainfed production systems

Autor: Singh, R.P.
Autor: Huerta-Espino, J.
Autor: Sharma, R.K.
Autor: Joshi, A.K.
Autor: Trethowan R.M.
Año: 2007
URI: http://hdl.handle.net/10883/2578
URI: http://hdl.handle.net/10883/2578
Resumen: Global wheat (Triticum aestivum L.) production must increase 2% annually until 2020 to meet future demands. Breeding wheat cultivars with increased grain yield potential, enhanced water-use efficiency, heat tolerance, end-use quality, and durable resistance to important diseases and pests can contribute to meet at least half of the desired production increases. The remaining half must come through better agronomic and soil management practices and incentive policies. Analyses of the recent International Yield Trials indicate that grain yields of the best new entries were usually 10% higher than the local checks globally, as well as within a country across sites. Variation in yield across sites within a country/region underline the role of genotype × environment (GE) interaction and provides opportunities to select for stable genotypes, which is not often done. The lack of proper analysis undermines proper utilization of germplasm with high yield potential and stability in the national wheat breeding programs. Some of the best performers in irrigated areas were amongst the best in semiarid environments, reinforcing the fact that high yield potential and drought tolerance can be improved simultaneously. The best performing lines often had genotypic base of widely adapted genotypes Kauz, Attila, Baviacora, and Pastor, with genetic contributions from other parents including synthetic wheat. We recommend within country multilocation analysis of trial performance for a crop season to identify lines suiting particular or different locations within a country. The immediate feedback on GE interaction will also help in breeding lines for countries having substantial variation across locations and years.
Lenguaje: English
Copyright: CIMMYT manages Intellectual Assets as International Public Goods. The user is free to download, print, store and share this work. In case you want to translate or create any other derivative work and share or distribute such translation/derivative work, please contact CIMMYT-Knowledge-Center@cgiar.org indicating the work you want to use and the kind of use you intend; CIMMYT will contact you with the suitable license for that purpose.
Tipo: Article
Región: Global
Paginas: 351-363
No de Revista: 3
Revista: Euphytica
Volumen de la Revista: 157
Palabras Claves: Grain yield
Palabras Claves: global performance
Palabras Claves: selected bulk
Palabras Claves: single-backcross
Palabras Claves: Stability
Palabras Claves: Triticum aestivum
Palabras Claves: Wheat


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