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Inheritance of Newly Identified Asiatic Rust Resistance Source EC 242104 in Soybean

Author: Govinda Sabale, Vivek Chimote, Milind Deshmukh and Gorakshnath Shinde

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Abstract

An experiment was carried out at ARS., Kasbe Digraj, Sangli to study the inheritance of Asiatic rust resistance in a newly identified resistant source (EC 242104) of soybean in Kharif 2022. For this purpose, two crosses were made viz., Cross I JS 2098 x EC 242104 and Cross II KDS 753 × EC 242104 and various generations (F1 & F2) of these crosses were evaluated along with their parents (P1 and P2) and susceptible check (JS 335). In order to spread infection, susceptible check JS 335 was sown on the border row and in between the lines. The distribution of rust grade, on a scale of 0 to 7, was noted for lesion types that were immune, reddish brown (RB) or resistant and TAN lesion or susceptible. The study revealed that in cross-I JS 2098 × EC 242104, the F2 progenies segregated in 3 resistant: 1 susceptible ratio indicating monogenic dominant inheritance of resistance to soybean rust. In cross-II KDS 753 × EC 242104, the F2 progenies segregated in 15 resistant: 1susceptible ratio indicating duplicate gene interaction, when presence of either of dominant gene/allele ensures rust resistance.

Keywords

Soybean, Rust, Inheritance, Phakospora pachyrhizi, EC 242104

Conclusion

From above findings it is clearly evident that Asiaticrust resistance in cross I JS 2098 × EC 242104 was controlled by single dominant gene. In cross II KDS 753 × EC 242104, two dominant genes controlling resistance reaction resulted into duplicate gene interaction. This is because KDS 753 already contain rust resistance gene from parent EC 241780. Identified exotic germplasm line EC 242104 showed highly resistance reaction.

References

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How to cite this article

Govinda Sabale, Vivek Chimote, Milind Deshmukh and Gorakshnath Shinde (2023). Inheritance of Newly Identified Asiatic Rust Resistance Source EC 242104 in Soybean. Biological Forum – An International Journal, 15(10): 1428-1431.