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Assessment of genotype x environment interaction and early generation evaluation for blast disease in finger millet (Eleusine coracana (L.) Gaertn.)

KrishiKosh

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Title Assessment of genotype x environment interaction and early generation evaluation for blast disease in finger millet (Eleusine coracana (L.) Gaertn.)
 
Creator Hiremath, Channayya
 
Contributor Gowda, Jayarame
 
Subject millets, genotypes, planting, genetics, environment, developmental stages, yields, diseases, selection, biological phenomena
 
Description A study was carried out during Kharif 2011 and 2012 to identify
resistant sources and also to know the extent of genotype by
environment interaction, variability and diversity for blast and other
economic characters at five diverse agro-climatic conditions viz.,
Bangalore (E1), Ranchi (E2), Vizianagaram (E3), Ranichauri (E4), and
Mandya (E5) over two years in selected 64 accessions. Analysis of
variance showed significant variation among the genotypes (G),
environments (E) and G×E interaction for all the traits. Significant
genotype, environments, year (Y), genotype × year, genotype ×
environments and G × E × Y interaction for blast was observed. The
magnitude of variation as revealed by PCV and GCV was moderate to
high for the traits like blast disease, plant height, productive tillers per
plant, flag leaf blade length, ear weight and grain weight. Significant
positive correlation was observed between leaf, neck and finger blast.
Based on stability analysis eight accessions were identified as stable
blast resistant sources viz., GE 4440, GE 4449, GE 1559, GE 132, GE
569, GE 1330, GE 669 and GE 1026. Based on morpho-metric diversity
analysis accessions were grouped into eight clusters. Intra and inter
cluster distance indicates considerable diversity among accessions. SSR
based molecular diversity detected 62 alleles in 32 accessions. The
number of alleles per locus ranged from 2 to 5 with an average of 2.48
alleles per locus. The marker UGEP8 (5 alleles) detected the highest
number of alleles followed by UGEP12 and UGEP60 (4 alleles). Mantel
test showed low correlation between morphological and molecular
diversity. A mapping population was developed using PR 202
(susceptible) and GPU 28 (resistant) as parents which are contrasting for
blast disease. Variability studies in F3 generation for yield and yield
attributing characters showed moderate to high variability for all the
characters studied.
 
Date 2016-05-21T09:31:20Z
2016-05-21T09:31:20Z
2013-09-17
 
Type Thesis
 
Identifier Th-10645
http://krishikosh.egranth.ac.in/handle/1/66187
 
Language en
 
Format application/pdf
 
Publisher University of Agricultural Sciences, Bengaluru