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Molecular Characterization of Pigeonpea (Cajanus cajan (L.) Millsp.) Accessions to Fusarium Wilt and Sterility Mosaic Disease

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Title Molecular Characterization of Pigeonpea (Cajanus cajan (L.) Millsp.) Accessions to Fusarium Wilt and Sterility Mosaic Disease
 
Creator Lalita G. Jaggal
 
Contributor B.R. Patil
 
Subject Plant Pathology
 
Description A minicore collection set comprising of 135 pigeonpea accessions obtained
from International Crop Research Institute for Semi-Arid Tropics (ICRISAT),
Patancheru, Andhra Pradesh was assessed for genetic parameters, correlation, and
path coefficient analysis and for reaction to fusarium wilt (FW) and sterility mosaic
disease (SMD). High genotypic and phenotypic co-efficient of variation, heritability
and genetic advance mean (GAM) was recorded for the characters viz., straw yield,
harvest index and seed yield. However, high heritability coupled with high GAM was
exhibited by the characters viz., plant height, days to fifty per cent flowering, days to
maturity and seed protein. Positive and significant association was recorded by the
characters viz., harvest index and straw yield among themselves and with seed yield.
The characters viz., harvest index, straw yield and seed protein for seed yield and
characters viz., number of branches, days to fifty per cent flowering, days from
flowering to maturity and test weight for seed protein exhibited positive direct effect.
Aforesaid characters may be stressed during selection for genetic gain.
The accession ICP3576 recorded high yield of 1.49 kg/3 m2 along with
resistance to SMD and the accessions ICP655 and ICP3049 recorded high seed yield
of 0.73 kg/3 m2 along with resistance to FW. Based on per cent disease incidence 13
and 16 accessions were selected for molecular characterization of SMD and FW
respectively using a set of 100 crop specific SSR markers. In total, 77.77 and 50.54
per cent of the alleles were found polymorphic for SMD and FW respectively. Among
them, CcM0246, CcM0381 and CcM0399 generated considerable polymorphism with
three alleles per marker. Most abundant motif?s in the present study were AT based
(AT, AAT, TTAT) followed by TC class of repeats. Such repeats may be emphasized
during marker assisted selection.
 
Date 2016-11-14T13:27:06Z
2016-11-14T13:27:06Z
2012
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/85416
 
Format application/pdf
 
Publisher UAS, Dharwad