Produtividade e identificação de fontes de resistência à antracnose em feijoeiro comum utilizando o marcador molecular SAS13

Abstract

The search for cultivars with high yield and resistance against anthracnose has been well discussed in Brazilian Plant Breeding Programs, but other agronomic characters should be also considered in order to attend the producer and consumer's preferences. The present study aimed to evaluated the agronomic performance of lines that make up the Rede Sul Brasileira de Avaliação common bean and reaction of these lines to anthracnose. Field experiments were conducted during the 2010 growing season at the experimental area of the Centro Tecnológico de Irrigação (CTI), Maringá and Umuarama. The treatments consisted of 16 lines of common bean in randomized complete block design with four repetitions. Each experimental unit consisted of two rows of 4.0m length, spaced at 0.50 m. The individual and joint variance analyses for grain yield revealed significant effects for genotypes, environment and also for interaction G × E (P ≤ 0.01 and 0.05 %). These results showing that these genotypes behaved differently according to different environments. The genetic enhancement in relation to grain yield was 11.94% in the experiment carried out in Maringá, while in Umuarama it was 11.50%. The genotypes that exhibited high grain yield and ample production stability were CNFP 10-104, LP-08-90 and LP 07-80, did not differ statistically from witnesses. The line UEM-G1 and the cultivar Tangará showed resistance to anthracnose and angular leaf spot diseases at field level in both environments. Therefore, showed resistance to anthracnose by inoculating the races 65 and 2047 Colletotrichum lindemuthianum, confirmed by molecular marker SAS13. These cultivars could be considered as important sources of anthracnose resistance in future breeding programs of common bean.