A quantitative analysis of rust (Uromyces fabae) resistance in pea (Pisum sativum) using RILs

A K SINGH; R RAI; C P SRIVASTAVA; B D SINGH; C KUSHWAHA; R CHAND

doi:10.56093/ijas.v82i2.15301

Authors

A K SINGH Banaras Hindu University, Varanasi, Uttar Pradesh 221 005
R RAI Banaras Hindu University, Varanasi, Uttar Pradesh 221 005
C P SRIVASTAVA Banaras Hindu University, Varanasi, Uttar Pradesh 221 005
B D SINGH Banaras Hindu University, Varanasi, Uttar Pradesh 221 005
C KUSHWAHA Banaras Hindu University, Varanasi, Uttar Pradesh 221 005
R CHAND Banaras Hindu University, Varanasi, Uttar Pradesh 221 005

https://doi.org/10.56093/ijas.v82i2.15301

Keywords:

AUDPC, Average degree of dominance, Heritability, Pea, Uromyces fabae

Abstract

In a quantitative analysis of pea rust resistance using a RIL population, heritability estimates for disease severity and AUDPC were found to be 0.90 and 0.93, respectively. High heritability indicated that selection for pea rust resistance can be made under polyhouse conditions using either disease severity or AUDPC as disease reaction estimators. Average degree of dominance (ADD) for resistance to U. fabae was 0.11 and 0.14 for disease severity and AUDPC, respectively, indicating that the genes controlling U. fabae resistance exhibited a low degree of incomplete dominance. Estimates of the minimum number of effective genes conferring resistance to pea rust, using three different methods of estimation, varied from two to three.

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