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Conventional and Molecular Approaches in Breeding for High Yield and Disease Resistance in Urdbean (Vigna mungo (L.) Hepper)

KrishiKosh

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Title Conventional and Molecular Approaches in Breeding for High Yield and Disease Resistance in Urdbean (Vigna mungo (L.) Hepper)
 
Creator Kumari Basamma
 
Contributor P.M. Salimath
 
Subject Genetics & Plant Breeding
 
Description A study was conducted to understand the inheritance of resistance to powdery
mildew and mungbean yellow mosaic virus (MYMV) in urdbean during 2008 to
2010. TAU-1, a high yielding but powdery mildew susceptible variety was crossed to
LBG-17 which is resistant to powdery mildew. The F1, F2 and F3 populations were
evaluated along with parents for resistance to powdery mildew under artificial
condition. The study indicated that two independent dominant genes together control
the resistance reaction in the host plant. Further, attempts were made to identify SSR
markers inked to powdery mildew disease following the bulk segregants analysis in F2
population of this cross. Out of 469 SSR primers used for screening parental
polymorphism, 32 primers could differentiate the two parents and two were found to
be closely linked to powdery mildew disease resistance.
Similarly inheritance of resistance to MYMV was studied by crossing TAU-1,
(susceptible to MYMV disease) with BDU-4, a resistant genotype. The evaluation of
F1, F2 and F3 and parental lines indicated the role of a dominant gene in governing the
inheritance of resistance to MYMV. Attempts to identify the marker linked to MYMV
did not give satisfactory result with 469 primers used for the study. Since TAU-1 is a
high yielding cultivar, the F2 and F3 populations developed using this as one of the
parents for inheritance study for diseases, were also evaluated for productivity and its
component traits. F2 evaluation revealed high variability and also transgressive
segregation. Similarly, evaluation of F3 families further based on selections made in
F2 confirmed the superiority of few families in both the populations. Twelve families
showing resistance to powdery mildew and high yield and nine F3 families showing
resistance to MYMV and high yield were identified. It is suggested to carry forward
these promising selections further to develop high yielding and disease resistant lines.
 
Date 2016-07-25T11:03:46Z
2016-07-25T11:03:46Z
2011
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/69701
 
Format application/pdf
 
Publisher UAS Dharwad