Reference Report for SoyBase42202407
| Title: | Inheritance of soybean (Glycine max (L.) Merrill) resistance to Cercospora sojina Hara |
| Authors: | Martins, F.S., Sediyama, C.S., Moreira, M.A., Barros, E.G. |
| Source: | Agro-Ciencia. 2000, 17(2):183-188 |
| Abstract: | Frogeye leaf spot caused by C. sojina is one of the most important soyabean disease in Brazil and has caused severe losses in many regions. The development of new cultivars resistant to C. sojina is a priority in all breeding programmes, since it is the most efficient and economical method of control. Although in Brazil, 22 races of C. sojina have been identified, the genetic control of resistance to this pathogen is largely unknown. To determine the inheritance of the resistance of soyabean (Glycine spp.) to one of the most virulent isolate of the fungus from the Alto Paranaiba region of Minas Gerais State, three resistant cultivars, Cristalina, Parana and Uberaba, were crossed to the susceptible cultivar, Bossier. The results indicated that Cristalina and Parana present one dominant locus controlling the resistance to the isolate. However, Uberaba presents two independent genes, one dominant and one recessive. From the crosses between resistant cultivars, it could be concluded that the dominant gene is the same in the three resistant cultivars. |
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