MOLECULAR MARKER ASSISTED INTRODUCTION OF RESISTANCE GENES FOR RUST, ANTHRACNOSE AND ANGULAR LEAF SPOT INTO COMMON BEAN CULTIVAR BRSMG TALISMA

摘要

The new common bean (Phaseolus vulgaris L.) cultivars released in Brazil must present a high disease resistance spectrum, as diseases are among the main causes for the low productivity of this crop in the country. BRSMG Talisma is a "carioca-type" cultivar which meets the market demands. The seeds are medium sized, beige with light brown stripes, with clear background, and colorless hylum). In addition, field evaluations demonstrate that BRSMG Talisma surpasses the most cultivated "carioca-type" varieties in Brazil by approximately 10%. However, this cultivar is highly susceptible to several races of Uromyces appendiculatus, Colletotrichum lindemuthianum and Pseudocercospora griseola (SOUZA et al., 2005). A "carioca-type" line Perola "R" was developed by the Bean Breeding Program of BIOAGRO/UFV with the following resistance genes and respective linked molecular markers: t/r-6W(SCF10io50a and SCBAOSseoa), Co-4 (SCY20g30a), Co-6 (SCAZ20_845a), Co-10 (SCFlOiosoa and SCBA08_56oa) and Phg-1 (SCH13_52).The objective of this work was to simultaneously transfer the resistance genes to rust (Ur-ON), anthracnose (Co-4, Co-6 and Co-10) and angular leaf spot (Phg-1) present in Perola "R" to the cultivar BRSMG Talisma with the aid of molecular markers.