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Morpho-physiological Characterization of Bread Wheat Accessions for Heat Stress Tolerance under Late Sown Conditions of North-Western Plain Zone of India

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Title Morpho-physiological Characterization of Bread Wheat Accessions for Heat Stress Tolerance under Late Sown Conditions of North-Western Plain Zone of India
Not Available
 
Creator Anil Patidar
Mahesh C Yadav
Jyoti Kumari
Shailesh Tiwari
Munesh K Kushwah
Mohammed Harun
Vijay Paul
BS Tomar
 
Subject Bread wheat
Characterization
Germplasm accessions
Heat-stress
Morpho-physiological traits
 
Description Not Available
Bread wheat is grown in the sub - tropical and tropical regions world - wide. Terminal - heat stress is a major
abiotic stress in wheat and global warming due to climate change has negatively impacted its production and
productivity. We evaluated 96 accessions of bread wheat germplasm, which included 79 indigenous and 17
exotic collections, by investigating 16 morpho - physiological and yield - related traits during two successive Rabi
seasons of 2018 - 19 and 2019 - 20 under non - stressed and heat - stressed (as a delayed sown crop) environments.
Heat susceptibility index (HSI) was used to classify tolerant (HSI 1.0) accessions.
The heat - stress showed negative impact on the phenotypic expression of 14 morpho - physiological and yield
related traits by reducing the traits more prominently in susceptible accessions than the tolerant. However, early
ground cover showed the increased expression in the tolerant accessions and higher variability in the germplasm
under the heat - stress. Grain length / width ratio (LWR) also improved in the germplasm under heat - stress, while,
there was a marked increase in LWR of the susceptible accessions mainly due to relatively higher decrease of
grain width in these accessions under heat - stress. The plot yield associated positively with its contributing traits
namely yield per plant, number of grains per plant, number of grains per spike, grain weight per spike and plant
biomass under both the non - stressed and the heat - stressed environments, but its association with chlorophyll
fl uorescence was only under heat - stress. The germplasm accessions IC574476 (HD2967), IC393878 (WH157),
IC296383 (WR544), EC534487 (PAU351), IC519900 (HD2932) and IC539221 [EIGN - I - (04 - 05) / 149] produced
high yield and were stable across the environments. The identifi ed bread wheat germplasm lines could be used
as potential parents for bi - parental and multi - parental populations.
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Date 2022-03-26T11:08:31Z
2022-03-26T11:08:31Z
2021-08-16
 
Type Research Paper
 
Identifier Patidar, A., Yadav, M.C., Kumari, J., Tiwari, S., Kushwah, M.K., Archak, S., Harun, M., Paul, V. and Tomar, B.S. (2021). Morpho-physiological characterization of bread wheat accessions for heat stress tolerance under late sown conditions of north-western plain zone of India. Indian Journal of Plant Genetic Resources 34(2): 258–273
DOI 10.5958/0976-1926.2021.00025.5
http://krishi.icar.gov.in/jspui/handle/123456789/70701
 
Language English
 
Relation Not Available;
 
Publisher Indian Journal of Plant Genetic Resources