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Biplot analysis of genotype × environment interactions and identification of stable sources of resistance to Ascochyta blight in chickpea (Cicer arietinum L.)

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Title Biplot analysis of genotype × environment interactions and identification of stable sources of resistance to Ascochyta blight in chickpea (Cicer arietinum L.)
Not Available
 
Creator S. Pande & M. Sharma & P. M. Gaur & A. K. Basandrai & L. Kaur & K. S. Hooda & D. Basandrai & T. Kiran Babu & S. K. Jain & A. Rathore
 
Subject Ascochyta blight . Chickpea . Genotype × environment interaction . Resistant sources
 
Description Not Available
Ascochyta blight (AB) caused by Ascochyta rabei
(Pass.) Labr. is one of the most important constraints that limits
the productivity of chickpea (Cicer arietinum L.). The absence
of high levels of stable resistant sources to the pathogen has
necessitated the continued search and identification of new
sources of resistance. The main aim of this work was to
identify new sources of resistance to AB and validate their
stability across multi-environments. A collection of 424 elite
chickpea genotypes were evaluated for AB resistance under
controlled environmental conditions in 2005–2006 at the
International Crops Research Institute for the Semi-Arid
Tropics (ICRISAT), Patancheru, India. Fifty-one genotypes
with AB severity ≤3.0 (based on the 1–9 scale) were selected
for a second round of evaluation in 2006–2007 at ICRISAT.
Based on the results obtained during both years, an Ascochyta
Blight Nursery (ABN) was established to evaluate the selected
29 chickpea genotypes, including 4 germplasm lines, 24
breeding lines and a highly susceptible line. The nursery was
evaluated at 3 locations (Almora, Dhaulakuan and Ludhiana)
in India over three crop seasons (2007–2008, 2008–2009 and
2009–2010) and under controlled environment conditions at
ICRISAT to further confirm the stable performance of these
genotypes. Analysis of variance revealed highly significant
effects of year, location (year), genotype and genotype ×
location (year) interaction. The genotype and genotype ×
environment (GGE) biplot analyses ofmulti-environment data
showed that resistance of five genotypes (EC 516934, ICCV
04537, ICCV 98818, EC 516850 and EC 516971) had mean
disease severity ≤3.0 on the 1–9 scale and the reactions were
consistent across the environments. Genotype EC 516934 was
found resistant to AB at the seedling stage in the controlled
environment at ICRISAT. The remaining genotypes showed
moderately resistant reaction (3.0–5.0) to AB under controlled
environment conditions. A significant positive correlation
was found between the performance of the genotypes
under controlled environment and field screening conditions
(r=0.70; P
Not Available
 
Date 2021-11-17T09:21:51Z
2021-11-17T09:21:51Z
2013-05-13
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/67518
 
Language English
 
Relation Not Available;
 
Publisher Not Available