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conferenceseries
.com
11
th
World Congress on
March 05-07, 2018 | Paris, France
Plant Biotechnology and Agriculture
Volume 6
Advances in Crop Science and Technology
ISSN: 2329-8863
Agri World 2018
March 05-07, 2018
Relationship between physiological traits and grain yield in wheat (
Triticum aestivum
L.) under heat-stress
environments
Pooran Chand
Sardar Vallabhbhai Patel University of Agriculture & Technology, India
T
he effects of heat stress on wheat are dependent on the intensity, type and duration of the stress. High temperature represents
a major constraint affecting wheat, particularly at the reproductive stage, in many parts of the world. While a systematic
understanding of the physiological basis of differences in heat tolerance of wheat cultivars are lacking, a number of physiological traits
are associated with performance under heat stress and may be used to increase selection efficiency. Therefore, the present study was
aimed to investigate the relationship between canopy temperature depression, membrane thermo-stability and other physiological
traits with grain yield and yield-contributing traits under heat stress environments in wheat and identification of suitable genotypes
for higher production and productivity in the target environments. An experiment was conducted during winter season of 2015-16
using 48 diverse wheat genotypes with three dates of sowing (15 November, 15 December and 5 January) to assess the relationship
of physiological parameters with grain yield under heat-stress environments. The analysis of normal, late and very late sowing,
revealed that all the characters showed sufficient amount of variability in all three environments among all the genotypes under study
and gives ample scope for further selection of the traits under consideration. Maximum variation was observed for characters, like
canopy temperature depression and membrane injury. Most of the characters had high heritability (broad sense) in pooled analysis.
Traits, like canopy temperature depression (at anthesis), canopy temperature depression (10 days after anthesis), membrane injury,
had high heritability estimates and which can be utilized as selection criteria in stress environments. Grain yield showed positive and
significant genotypic correlation coefficients with canopy temperature depression at anthesis, canopy temperature depression at 10
days after anthesis and membrane injury per cent. Based on the genotypic coefficient of variation, phenotypic coefficient of variation,
genetic advance and heritability, the traits canopy temperature depression at anthesis, canopy temperature depression at 10 days after
anthesis, membrane injury percent and relative water content can be used as selection criteria for improving the grain yield heat tress
environment.
Biography
Pooran Chand has expertise in teaching and development of wheat and rice varieties with reference to heat and drought tolerant through conventional and non-
conventional methods. He has published more than 50 research papers in different reputed research journals and associated in the development and releasing of
14 varieties in different crops.
pckardam@rediffmail.comPooran Chand, Adv Crop Sci Tech 2018, Volume 6
DOI: 10.4172/2329-8863-C1-005