Molecular Characterization of Pigeonpea (Cajanus cajan (L.) Millsp.) Accessions to Fusarium Wilt and Sterility Mosaic Disease
KrishiKosh
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Title |
Molecular Characterization of Pigeonpea (Cajanus cajan (L.) Millsp.) Accessions to Fusarium Wilt and Sterility Mosaic Disease
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Creator |
Lalita G. Jaggal
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Contributor |
B.R. Patil
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Subject |
Plant Pathology
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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. |
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Date |
2016-11-14T13:27:06Z
2016-11-14T13:27:06Z 2012 |
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Type |
Thesis
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Identifier |
http://krishikosh.egranth.ac.in/handle/1/85416
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Format |
application/pdf
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Publisher |
UAS, Dharwad
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