| Journal: |
Front. Plant Sci
Frontiers in Plant Science
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Volume: |
13
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| Abstract: |
Yellow rust and heat stress adversatively impact the growth and production of
bread wheat in particular under rising adverse environmental conditions.
Stability of grain yield is a pivotal purpose of plant breeders to improve wheat
production and ensure global food security especially under abrupt climate
change. The objective of this study was to assess the performance and stability
of diverse bread wheat genotypes for yellow rust resistance, heat stress, and
yield traits. The studied genotypes were evaluated in two different locations
under two sowing dates (timely and late sowing) during two growing seasons.
The obtained results displayed significant differences among the tested
locations, sowing dates, and genotypes for most measured traits. The yellow
rust measurements evaluated under the field conditions includingfinal rust
severity (FRS), the average coefficient of infection (ACI), and area under disease
progress curve (AUDPC) revealed that Giza-171, Misr-1, Gemmeiza-12,
Shandweel-1, Sids-13, Line-1, Line-2, and Line-55 had better resistance.
Based on heat sensitivity measurements, Line-1 and Line-2 followed by Line-35, Shandweel-1 and Line-55 were classified as more tolerant to heat stress
compared with the remaining genotypes. The genotypes Line-55, Gemmeiza-12, Giza-171, Line-1, Line-2, and Misr-1 were able to maintain acceptable
agronomic performance under timely and late sowing dates in all evaluated
environments. Different statistical procedures were employed to explore the
adaptability and stability of tested genotypesi.e., joint regression, stratified
Frontiers inPlant Science frontiersin.org 01
OPEN ACCESS
EDITED BY
Mehdi Rahimi,
Graduate University of Advanced
Technology, Iran
REVIEWED BY
Khaled Y. Kamal,
Texas A&M University, United States
Bita Naseri,
Agricultural Research, Education and
Extension Organization (AREEO), Iran
Ahmed Attia,
International Center for Biosaline
Agriculture, Dubai, United Arab
*CORRESPONDENCE
Elsayed Mansour
sayed_mansour_84@yahoo.es
SPECIALTY SECTION
This article was submitted to
Plant Abiotic Stress,
a section of the journal
Frontiers in Plant Science
RECEIVED09 August 2022
ACCEPTED26 September 2022
PUBLISHED10 November 2022
CITATION
Megahed EMA,Awaad HA,
Ramadan IE,Abdul-Hamid MIE,
Sweelam AA,El-Naggar DR and
Yellow rust and heat stress adversatively impact the growth and production of
bread wheat in particular under rising adverse environmental conditions.
Stability of grain yield is a pivotal purpose of plant breeders to improve wheat
production and ensure global food security especially under abrupt climate
change. The objective of this study was to assess the performance and stability
of diverse bread wheat genotypes for yellow rust resistance, heat stress, and
yield traits. The studied genotypes were evaluated in two different locations
under two sowing dates (timely and late sowing) during two growing seasons.
The obtained results displayed significant differences among the tested
locations, sowing dates, and genotypes for most measured traits. The yellow
rust measurements evaluated under the field conditions includingfinal rust
severity (FRS), the average coefficient of infection (ACI), and area under disease
progress curve (AUDPC) revealed that Giza-171, Misr-1, Gemmeiza-12,
Shandweel-1, Sids-13, Line-1, Line-2, and Line-55 had better resistance.
Based on heat sensitivity measurements, Line-1 and Line-2 followed by Line-35, Shandweel-1 and Line-55 were classified as more tolerant to heat stress
compared with the remaining genotypes. The genotypes Line-55, Gemmeiza-12, Giza-171, Line-1, Line-2, and Misr-1 were able to maintain acceptable
agronomic performance under timely and late sowing dates in all evaluated
environments. Different statistical procedures were employed to explore the
adaptability and stability of tested genotypesi.e., joint regression, stratified
ranking, Wricke's Ecovalence values, cultivar superiority, additive main effects,
and multiplicative interaction (AMMI), AMMI stability value, and genotype plus
genotype-by-environment interaction (GGE). The applied stability parameters
were quite similar for describing the stability of the evaluated wheat
genotypes. The results indicated that Gemmeiza-12, Giza-171, Sids-12, Sids-13, Misr-1 Shandweel-1, Line-1, Line-2, and Line-55 were desirable and stable.
The heatmap and hierarchical clustering were exploited for dividing the
evaluated bread wheat genotypes into different clusters based on yellow
rust resistance measurements, heat tolerance indices, and agronomic
performance. Line-1 and Line-2 had the best performance for all rust
resistance, heat tolerance, and agronomic performance followed by Giza-171, Line-55, Line-35, Gemmeiza-12, Shandweel-1, Misr-1, and Sids-13. In
conclusion, our findings provide evidence of utilizing promising genotypes in
rust resistance, heat tolerance, and agronomic performance in breeding
programs for improving wheat grain yield stability mainly under
climate change.
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