RECURRENT SELECTION TO DEVELOPMENT OF CARIOCA TYPE COMMONBEANS CULTIVARS AT IAPAR

摘要

Brazil is the main world producer and consumer of common beans (Phaseolus vulgaris L.). The annual area cultivated is around 3,366 million hectares with an approximated production of 3,454 million tons and the estimated consumption of 17kg per capita peryear (Conab, 2015). Among the various types of common beans consumed in Brazil, carioca beans represent about 67% of the total production, corresponding to about 2,314 million tons per year. In the development of new autogamous cultivars pedigree, bulkor SSD method and their variants are usually is used in a population often obtained by biparental crosses. The major limitations of these methodologies are low genetic variability and low probability of genetic recombination occurrence, reducing the genetic gain. The recurrent selection (RS) has been used as a way to overcome these but also to broaden the genetic base of cultivars. This work aimed to develop new carioca type common beans cultivars with high yield potential, production stability and higher technological and nutritional grain characteristics.