Progress in the Spanish National Barley Breeding Program
| Autor: | Ernesto Igartua, J. M. Lasa, Primitiva Codesal, J. L. Molina-Cano, B. Medina, M. P. Gracia, Marian Moralejo, P. López-Fuster, J. L. Montoya, Elsayed Mansour, Ana M. Casas, A. López, Francisco J. Ciudad, J.A. Escribano |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
interacción genotipo por ambiente
Pedigree selection Breeding program Yield (finance) Advanced stage Ordi food and beverages Public research Flowering time pedigree selection Agricultural science Genotype-by-environment interaction Geography Genetic gain Grain yield Selección genealógica genotype-by-environment interaction Agronomy and Crop Science Iteracción genotipo por ambiente Hordeum vulgare |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname Spanish Journal of Agricultural Research; Vol. 10 No. 3 (2012); 741-751 Spanish Journal of Agricultural Research; Vol. 10 Núm. 3 (2012); 741-751 SJAR. Spanish Journal of Agricultural Research Repositorio Abierto de la UdL Universitad de Lleida Recercat. Dipósit de la Recerca de Catalunya |
| ISSN: | 2171-9292 |
| Popis: | 11 Pags., 7 Tabls., 1 Fig. The Spanish Barley Breeding Program is carried out by four public research organizations, located at the most representative barley growing regions of Spain. The aim of this study is to evaluate the program retrospectively, attending to: i) the progress achieved in grain yield, and ii) the extent and impact of genotype-by-environment interaction of grain yield. Grain yields and flowering dates of 349 advanced lines in generations F8, F9 and F10, plus checks, tested at 163 trials over 11 years were analized. The locations are in the provinces of Albacete, Lleida, Valladolid and Zaragoza. The data are highly unbalanced because the lines stayed at the program for a maximum of three years. Progress was estimated using relative grain yield and mixed models (REML) to homogenize the results among years and locations. There was evident progress in the program over the period studied, with increasing relative yields in each generation, and with advanced lines surpassing the checks in the last two generations, although the rate of progress was uneven across locations. The genetic gain was greater from F8 to F9 than from F9 to F10. The largest non-purely environmental component of variance was genotype-by-location-by-year, meaning that the genotype-by-location pattern was highly unpredictable. The relationship between yield and flowering time overall was weak in the locations under study at this advanced stage of the program. The program can be continued with the same structure, although measures should be taken to explore the causes of slower progress at certain locations. This scientific work was supported by the Spanish Ministry of Science and Innovation (MICINN) for funding this work with the scholarship BES-2008- 009623 (EM) and the project AGL2007-63625. The Spanish National Barley Breeding Programme has been financed by successive grants from the Spanish Ministry of Science and Innovation (MICINN), the last one being the project RTA2009-00006-C04. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|