Hernaiz Santiago Ignacio, Alvarado José Roberto, Châtel Marc, Castillo Dalma, Ospina Yolima.
2003. Mejoramiento de poblaciones de arroz de riego para clima templado en Chile.
In : Mejoramiento poblacional, una alternativa para explorar los recursos genéticos del arroz en América latina. Guimaraes Elcio Perpetuo (ed.). FAO, EMBRAPA, CIRAD-CA
Titre anglais : Improving irrigated rice populations for Chile's temperate climate
Résumé : Current varieties in Chile have reached their maximum productivity possible under field conditions. Hence, to increase yield potential, the national rice programme decided to incorporate population improvement by recurrent selection. During the 1996/97 cropping season, a site-specific population (PQUI-1) was developed from a gene pool introduced from CIRAD (GPIRAT-10). In the 2000/01 season, a second site-specific population (PQUI-2) was obtained, using PQUI-1\CH\3\1 as base population. The first recombination was done at CIAT, Colombia. The Chilean population PQUI-1 was improved, using two methods: the first was based on selecting malesterile plants in two ecosystems: Chillan at 36° 34'S and 72° 02'W, and Colchagua at 34° 33'S and 71° 24'W The second method was based on selecting fertile plants tested, under controlled laboratory conditions, for cold tolerance at germination. Taking into account the wide variability shown by the populations, fertile plants were selected and their progeny evaluated in line nurseries. Evaluation of the first fixed lines obtained showed yields were 6% to 9% higher than those of the commercial variety Diamante-INIA.
Mots-clés Agrovoc : Oryza, population composite, sélection récurrente, zone tempérée
Mots-clés géographiques Agrovoc : Chili
Classification Agris : F30 - Génétique et amélioration des plantes
Auteurs et affiliations
- Hernaiz Santiago Ignacio, INIA (CHL)
- Alvarado José Roberto, INIA (CHL)
- Châtel Marc, CIRAD-CA-CALIM (COL)
- Castillo Dalma, INIA (CHL)
- Ospina Yolima, CIAT (COL)
Autres liens de la publication
Source : Cirad - Agritrop (https://agritrop.cirad.fr/519436/)
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