Reference Report for SoyBase42202437
| Title: | Inheritance of resistance to pod shattering in soybean |
| Authors: | Tukamuhabwa, P., Rubaihayo, P.R., Dashiell, K.E., Adipala, E. |
| Source: | Afr. Crop Sci. J. 2000, 8(3):203-211 |
| Abstract: | The inheritance mechanism of pod shattering in soyabeans were assessed. The narrow sense heritability and number of genes controlling soyabean pod shattering were also determined. Eight parental lines were characterized for pod shattering in a field experiment conducted in Namulonge, Uganda during December 1996 and their level of resistance to pod shattering were confirmed using the oven method (80°C for 12 h). Genotypes AGS 292 and TGm 737P were susceptible; Gc81090-48, Duiker, TGx 1448-2E and Roan were resistant while Kabanyolo 1 and Samsoy 1 were intermediate. A total of 15 soyabean crosses were made from the 8 lines in 2 sets which were planted during March and September 1997 and 1998, respectively. All the F1 plants indicated a phenotype closer to the susceptible parent than the resistant parent suggesting partial dominance for susceptibility while F2 plants showed a 1 resistant:3 intermediate:12 susceptible ratio suggesting the presence of dominant epistasis and that 2 genes controlled shattering resistance. The parent-offspring regression analysis indicated a narrow sense heritability of 0.79 but was not influenced by maternal effects. |
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