scholarly journals Genomic Architecture of Phenotypic Plasticity in Response to Water Stress in Tetraploid Wheat

2021 ◽  
Vol 22 (4) ◽  
pp. 1723
Author(s):  
Andrii Fatiukha ◽  
Mathieu Deblieck ◽  
Valentyna Klymiuk ◽  
Lianne Merchuk-Ovnat ◽  
Zvi Peleg ◽  
...  
Keyword(s):  
Water Stress ◽  
Phenotypic Plasticity ◽  
Abiotic Stresses ◽  
Complex Traits ◽  
Flowering Phenology ◽  
Wild Emmer Wheat ◽  
Wild Emmer ◽  
Plant Adaptation ◽  
Genomic Architecture ◽  
Response To Water

Phenotypic plasticity is one of the main mechanisms of adaptation to abiotic stresses via changes in critical developmental stages. Altering flowering phenology is a key evolutionary strategy of plant adaptation to abiotic stresses, to achieve the maximum possible reproduction. The current study is the first to apply the linear regression residuals as drought plasticity scores while considering the variation in flowering phenology and traits under non-stress conditions. We characterized the genomic architecture of 17 complex traits and their drought plasticity scores for quantitative trait loci (QTL) mapping, using a mapping population derived from a cross between durum wheat (Triticum turgidum ssp. durum) and wild emmer wheat (T. turgidum ssp. dicoccoides). We identified 79 QTLs affected observed traits and their plasticity scores, of which 33 reflected plasticity in response to water stress and exhibited epistatic interactions and/or pleiotropy between the observed and plasticity traits. Vrn-B3 (TaTF1) residing within an interval of a major drought-escape QTL was proposed as a candidate gene. The favorable alleles for most of the plasticity QTLs were contributed by wild emmer wheat, demonstrating its high potential for wheat improvement. Our study presents a new approach for the quantification of plant adaptation to various stresses and provides new insights into the genetic basis of wheat complex traits under water-deficit stress.

Genomic architecture of phenotypic plasticity of complex traits in tetraploid wheat in response to water stress

2019 ◽  
Author(s):  
Andrii Fatiukha ◽  
Mathieu Deblieck ◽  
Valentina Klymiuk ◽  
Lianne Merchuk-Ovnat ◽  
Zvi Peleg ◽  
...  
Keyword(s):  
Water Stress ◽  
Abiotic Stresses ◽  
Complex Traits ◽  
Genetic Basis ◽  
Flowering Phenology ◽  
Water Deficit Stress ◽  
Plant Adaptation ◽  
New Approach ◽  
Genomic Architecture ◽  
Response To Water

AbstractPhenotypic plasticity is one of the main mechanisms of adaptation to abiotic stresses via changes in critical developmental stages. Altering flowering phenology is a key evolutionary strategy of plant adaptation to abiotic stresses in order to achieve maximum possible reproduction. The current study is the first to apply the linear regression residuals as a drought plasticity scores, while taking into account the differences in flowering phenology and trait variation under non-stress conditions. We characterized the genomic architecture of 17 complex traits and their drought plasticity using a mapping population derived from a cross between durum wheat (Triticum durum) and wild emmer wheat (T. dicoccoides). We identified 79 QTLs, of which 33 were plastic in response to water stress and exhibited epistatic interactions and/or pleiotropy between the initial and plasticity traits. Vrn-B3 (TaTF1) residing within an interval of a major drought-escape QTL was proposed as a candidate gene. The favorable alleles for most of the plasticity QTLs were contributed by wild emmer, demonstrating the high potential of wild relatives for wheat improvement. Our study presents a new approach for quantification of plant adaptation to various stresses and provides new insights into the genetic basis of wheat complex traits under water-deficit stress.HighlightThe study presents a new approach for quantification of plant adaptation to various stresses and provides new insights into the genetic basis of wheat complex traits under water-deficit stress.

Evolution and Adaptation of Wild Emmer Wheat Populations to Biotic and Abiotic Stresses

2016 ◽  
Vol 54 (1) ◽  
pp. 279-301 ◽  
Author(s):  
Lin Huang ◽  
Dina Raats ◽  
Hanan Sela ◽  
Valentina Klymiuk ◽  
Gabriel Lidzbarsky ◽  
...  
Keyword(s):  
Abiotic Stresses ◽  
Wild Emmer Wheat ◽  
Emmer Wheat ◽  
Wild Emmer ◽  
Biotic And Abiotic Stresses

scholarly journals Wild emmer introgressions alter root-to-shoot growth dynamics in response to water stress

2020 ◽  
Author(s):  
Harel Bacher ◽  
Feiyu Zhu ◽  
Tian Gao ◽  
Kan Liu ◽  
Balpreet K Dhatt ◽  
...  
Keyword(s):  
Water Stress ◽  
Growth Dynamics ◽  
Introgression Line ◽  
Wild Emmer ◽  
Shoot Biomass ◽  
Stress Adaptation ◽  
Limiting Factor ◽  
High Plasticity ◽  
Growth Responses ◽  
Response To Water

AbstractWater deficit is a major limiting factor for wheat (Triticum sp.) development and productivity. One approach to increase water stress adaptation in wheat is incorporating novel alleles from the drought-adapted wheat progenitor, wild emmer (T. turgidum ssp. dicoccoides). We explored this idea in the context of vegetative growth by examining the phenotypic consequence of a series of wild emmer (acc. Zavitan) introgressions into elite durum wheat (cv. Svevo) under water-limited conditions. Using image-based phenotyping we cataloged divergent (from Svevo) growth responses to water stress ranging from high plasticity to high stability among the introgression lines. We identified an introgression line (IL20) that exhibits a highly plastic response to water stress by shifting its root-to-shoot biomass ratio for detailed characterization. By combining genotypic information with root transcriptome analysis, we propose several candidate genes (including a root-specific kinase) that can confer the shoot-to-root carbon resource allocation in IL20 under water stress. Discovery of high plasticity trait in IL20 in response to water stress highlights the potential of wild introgressions for enhancing stress adaptation via mechanisms that may be absent or rare in elite breeding material.

Primary Root Elongation Rate and Abscisic Acid Levels of Maize in Response to Water Stress

Crop Science ◽  
2011 ◽  
Vol 51 (1) ◽  
pp. 157-172 ◽  
Author(s):  
Kristen A. Leach ◽  
Lindsey G. Hejlek ◽  
Leonard B. Hearne ◽  
Henry T. Nguyen ◽  
Robert E. Sharp ◽  
...  
Keyword(s):  
Abscisic Acid ◽  
Water Stress ◽  
Root Elongation ◽  
Primary Root ◽  
Elongation Rate ◽  
Root Elongation Rate ◽  
Response To Water

scholarly journals Sex dimorphism in dioecious Palmer amaranth (Amaranthus palmeri) in response to water stress

Planta ◽  
2021 ◽  
Vol 254 (1) ◽  
Author(s):  
Mohsen B. Mesgaran ◽  
Maor Matzrafi ◽  
Sara Ohadi
Keyword(s):  
Water Stress ◽  
Weed Management ◽  
Amaranthus Palmeri ◽  
Ecological Management ◽  
State University ◽  
Dioecious Species ◽  
Seed Output ◽  
Flowering Asynchrony ◽  
Secondary Sex Characters ◽  
Response To Water

Abstract Main conclusion Phenological isolation can potentially reduce seed output and may be exploited as a novel tool for ecological management of dioecious weeds. Abstract Dioecious plants may benefit from a maximized outcrossing and optimal sex-specific resource allocation; however, this breeding system may also be exploited for weed management. Seed production in dioecious species is contingent upon the co-occurrence and co-flowering of the two genders and can be further disturbed by flowering asynchrony. We explored dimorphism in secondary sex characters in Amaranthus palmeri, and tested if reproductive synchrony can be affected by water stress. We have used seeds of A. palmeri from California, Kansas and Texas, and studied secondary sex characters under natural conditions and in response to water stress. Seeds of A. palmeri from California (CA) and Kansas (KS) were cordially provided by Dr. Anil Shrestha (California State University, Fresno, California) and Dr. Dallas E. Peterson (Kansas State University, Manhattan, Kansas), respectively. Seeds of a third population were collected from mature plants (about 30 plants) from a set-aside field in College Station, Texas. A. palmeri showed no sexual dimorphism with regard to the timing of emergence, plant height, and relative growth rate. While the initiation of flowering occurred earlier in males than females, females preceded males in timing of anthesis. Water stress delayed anthesis in males to a greater extent than females increasing the anthesis mismatch between the two sexes by seven days. Our data provide the first evidence of environment-controlled flowering asynchrony in A. palmeri. From a practical point of view, phenological isolation can potentially reduce seed output and may be exploited as a novel tool for ecological management of dioecious weeds.

scholarly journals Solar Radiation-Associated Adaptive SNP Genetic Differentiation in Wild Emmer Wheat, Triticum dicoccoides

2017 ◽  
Vol 8 ◽  
Author(s):  
Jing Ren ◽  
Liang Chen ◽  
Xiaoli Jin ◽  
Miaomiao Zhang ◽  
Frank M. You ◽  
...  
Keyword(s):  
Solar Radiation ◽  
Genetic Differentiation ◽  
Triticum Dicoccoides ◽  
Wild Emmer Wheat ◽  
Emmer Wheat ◽  
Wild Emmer
Sign in / Sign up

Export Citation Format

Share Document