ABSTRACT PQUI-1 rice population developed with cold tolerance by recurrent selection
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Santiago Hernaiz L.1, Roberto Alvarado A., Marc Chatel y Jaime Borrero |
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Rice genetic stock (Oryza sativa L.) GPIRAT-10 made up of japanese type varieties and strains was crossed with Chilean material to introduce greater cold tolerance. As a result, a new population for recurrent selection named PQUI-1 was obtained. This new population was composed of GPIRAT-10 (50%) and the Chilean genotypes Diamante-INIA (10.3%), Buli -INIA (13.3%), Quila 67108 (16.22%), CINIA 609 (5.09%) and CINIA 606 (5.09%). The population PQUI-1 ripens earlier and has greater cold resistance. During the first recombination cycle, the population PQUI-1 was sowed in two different ecosystems (Chillán and Colchagua), and a selection of plants was made based on environmental and agricultural characteristics, finally obtaining two new populations named PQUI-1CO 1 and PQUI-1 CH 1. |
Keywords: Recurrent population, cold tolerance, rice breeding, Oryza sativa |
1 Instituto de Investigaciones Agropecuarias, Centro Regional de Investigación Quilamapu, Casilla 426, Chillán, Chile. E-mail: shernaiz@inia.cl. |
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