Introgression of anthracnose resistance gene(s) into common bean (Phaseolus vulgaris)

Abstract. Kazimoto GK, Nchimbi-Msolla SF, Mabagala RB. 2022. Introgression of anthracnose resistance gene(s) into common bean (Phaseolus vulgaris). Cell Biol Dev 6: 20-31. Common disease caused by the fungus Colletotrichum lindemuthianum causes significant yield losses. It is most destructive in areas with cool temperatures and high humidity (90-100%). The study aimed to introduce genes adapted but susceptible local cultivars Masai Red Soya Njano using conventional breeding methods. Five races C. were isolated named from thirty-two bean-diseased plant samples collected Northern Tanzania. sources resistant G2333 AB136. Early developed populations evaluated under field conditions altitude humid environments at Bashnet Manyara region, highlands Both F2 F3 x segregated for a 9:7 ratio. Such segregation implied that two dominant epistatic conferred G2333, being mode gene interaction. crosses between ratio was 10:6, implying transferred populations. progenies obtained crossing AB136 showed 3:1. cross 3:1 confirmed single inheritance progenies. heritability (h²) 0.41 0.45. While Njano, Red, A136 0.2 0.53, which moderate heritability. need further testing MAS confirm presence genes. Multi-location should be done verify levels population later generations.