Ancestral QTL alleles from wild emmer wheat improve grain yield, biomass and photosynthesis across enviroinments in modern wheat

Lianne Merchuk-Ovnat; Tzion Fahima; Tamar Krugman; Yehoshua Saranga

doi:10.1016/j.plantsci.2016.05.003

Ancestral QTL alleles from wild emmer wheat improve grain yield, biomass and photosynthesis across enviroinments in modern wheat

Lianne Merchuk-Ovnat, Tzion Fahima, Tamar Krugman, Yehoshua Saranga^*

^*Corresponding author for this work

Institute of Plant Sciences and Genetics in Agriculture

Research output: Contribution to journal › Article › peer-review

33 Scopus citations

Abstract

Wild emmer wheat (Triticum turgidum ssp. dicoccoides) is considered a promising source for improving drought resistance in domesticated wheat. Nevertheless, wild germplasm has not been widely used in wheat breeding for abiotic stress resilience. In the current study, a near isogenic line NIL-7A-B-2, introgressed with a drought-related QTL from wild emmer wheat on chromosome 7A, and its recurrent parent, bread wheat cv. BarNir, were investigated under four environments across 2 years—water-limited and well-watered conditions in a rain-protected screen-house (Year 1) and two commercial open field plots under ample precipitation (Year 2). NIL-7A-B-2 exhibited an advantage over BarNir in grain yield and biomass production under most environments. Further physiological analyses suggested that enhanced photosynthetic capacity and photochemistry combined with higher flag leaf area are among the factors underlying the improved productivity of NIL-7A-B-2. These were coupled with improved sink capacity in NIL-7A-B-2, manifested by greater yield components than its parental line. This study provides further support for our previous findings that introgression of wild emmer QTL alleles, using marker assisted selection, can enhance grain yield and biomass production across environments in domesticated wheat, thereby enriching the modern gene pool with essential diversity for the improvement of yield and drought resistance.

Original language	American English
Pages (from-to)	23-34
Number of pages	12
Journal	Plant Science
Volume	251
DOIs	https://doi.org/10.1016/j.plantsci.2016.05.003
State	Published - 1 Oct 2016

Bibliographical note

Funding Information:
This study was supported by The Israel Ministry of Agriculture and Rural Development , Chief Scientist Foundation (grant nos. 837-0079-10 , 837-0162-14 ). L. M.-O. is indebted to the R.H. Smith Foundation for a doctoral fellowship award. We thank Uzi Naftalyahu, Idan Richker and Zeev Haker for assistance in the Be'eri field trials, Zeev Ovnat for developing the image analysis software, and David Bonfil for grain protein measurements. We also thank Vered Barak, Shiran Ben-Zeev, Jajaw Bimro, Libat Green, Noya Ruth Itzhak, Nir Krintza, Ronen Livni, Zlil Shatz and Yannai Zausmer for their excellent assistance in the field and in the laboratory. YS is the incumbent of the Haim Gvati Chair in Agriculture.

Publisher Copyright:
© 2016 Elsevier Ireland Ltd

Keywords

Grain yield
Leaf gas exchange
Near-isogenic line
Quantitative trait locus
Triticum turgidum ssp. dicoccoides
Water stress
Water-use efficiency

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10.1016/j.plantsci.2016.05.003

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title = "Ancestral QTL alleles from wild emmer wheat improve grain yield, biomass and photosynthesis across enviroinments in modern wheat",

abstract = "Wild emmer wheat (Triticum turgidum ssp. dicoccoides) is considered a promising source for improving drought resistance in domesticated wheat. Nevertheless, wild germplasm has not been widely used in wheat breeding for abiotic stress resilience. In the current study, a near isogenic line NIL-7A-B-2, introgressed with a drought-related QTL from wild emmer wheat on chromosome 7A, and its recurrent parent, bread wheat cv. BarNir, were investigated under four environments across 2 years—water-limited and well-watered conditions in a rain-protected screen-house (Year 1) and two commercial open field plots under ample precipitation (Year 2). NIL-7A-B-2 exhibited an advantage over BarNir in grain yield and biomass production under most environments. Further physiological analyses suggested that enhanced photosynthetic capacity and photochemistry combined with higher flag leaf area are among the factors underlying the improved productivity of NIL-7A-B-2. These were coupled with improved sink capacity in NIL-7A-B-2, manifested by greater yield components than its parental line. This study provides further support for our previous findings that introgression of wild emmer QTL alleles, using marker assisted selection, can enhance grain yield and biomass production across environments in domesticated wheat, thereby enriching the modern gene pool with essential diversity for the improvement of yield and drought resistance.",

keywords = "Grain yield, Leaf gas exchange, Near-isogenic line, Quantitative trait locus, Triticum turgidum ssp. dicoccoides, Water stress, Water-use efficiency",

author = "Lianne Merchuk-Ovnat and Tzion Fahima and Tamar Krugman and Yehoshua Saranga",

note = "Funding Information: This study was supported by The Israel Ministry of Agriculture and Rural Development , Chief Scientist Foundation (grant nos. 837-0079-10 , 837-0162-14 ). L. M.-O. is indebted to the R.H. Smith Foundation for a doctoral fellowship award. We thank Uzi Naftalyahu, Idan Richker and Zeev Haker for assistance in the Be'eri field trials, Zeev Ovnat for developing the image analysis software, and David Bonfil for grain protein measurements. We also thank Vered Barak, Shiran Ben-Zeev, Jajaw Bimro, Libat Green, Noya Ruth Itzhak, Nir Krintza, Ronen Livni, Zlil Shatz and Yannai Zausmer for their excellent assistance in the field and in the laboratory. YS is the incumbent of the Haim Gvati Chair in Agriculture. Publisher Copyright: {\textcopyright} 2016 Elsevier Ireland Ltd",

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doi = "10.1016/j.plantsci.2016.05.003",

language = "American English",

volume = "251",

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AU - Merchuk-Ovnat, Lianne

AU - Fahima, Tzion

AU - Krugman, Tamar

AU - Saranga, Yehoshua

N1 - Funding Information: This study was supported by The Israel Ministry of Agriculture and Rural Development , Chief Scientist Foundation (grant nos. 837-0079-10 , 837-0162-14 ). L. M.-O. is indebted to the R.H. Smith Foundation for a doctoral fellowship award. We thank Uzi Naftalyahu, Idan Richker and Zeev Haker for assistance in the Be'eri field trials, Zeev Ovnat for developing the image analysis software, and David Bonfil for grain protein measurements. We also thank Vered Barak, Shiran Ben-Zeev, Jajaw Bimro, Libat Green, Noya Ruth Itzhak, Nir Krintza, Ronen Livni, Zlil Shatz and Yannai Zausmer for their excellent assistance in the field and in the laboratory. YS is the incumbent of the Haim Gvati Chair in Agriculture. Publisher Copyright: © 2016 Elsevier Ireland Ltd

PY - 2016/10/1

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N2 - Wild emmer wheat (Triticum turgidum ssp. dicoccoides) is considered a promising source for improving drought resistance in domesticated wheat. Nevertheless, wild germplasm has not been widely used in wheat breeding for abiotic stress resilience. In the current study, a near isogenic line NIL-7A-B-2, introgressed with a drought-related QTL from wild emmer wheat on chromosome 7A, and its recurrent parent, bread wheat cv. BarNir, were investigated under four environments across 2 years—water-limited and well-watered conditions in a rain-protected screen-house (Year 1) and two commercial open field plots under ample precipitation (Year 2). NIL-7A-B-2 exhibited an advantage over BarNir in grain yield and biomass production under most environments. Further physiological analyses suggested that enhanced photosynthetic capacity and photochemistry combined with higher flag leaf area are among the factors underlying the improved productivity of NIL-7A-B-2. These were coupled with improved sink capacity in NIL-7A-B-2, manifested by greater yield components than its parental line. This study provides further support for our previous findings that introgression of wild emmer QTL alleles, using marker assisted selection, can enhance grain yield and biomass production across environments in domesticated wheat, thereby enriching the modern gene pool with essential diversity for the improvement of yield and drought resistance.

AB - Wild emmer wheat (Triticum turgidum ssp. dicoccoides) is considered a promising source for improving drought resistance in domesticated wheat. Nevertheless, wild germplasm has not been widely used in wheat breeding for abiotic stress resilience. In the current study, a near isogenic line NIL-7A-B-2, introgressed with a drought-related QTL from wild emmer wheat on chromosome 7A, and its recurrent parent, bread wheat cv. BarNir, were investigated under four environments across 2 years—water-limited and well-watered conditions in a rain-protected screen-house (Year 1) and two commercial open field plots under ample precipitation (Year 2). NIL-7A-B-2 exhibited an advantage over BarNir in grain yield and biomass production under most environments. Further physiological analyses suggested that enhanced photosynthetic capacity and photochemistry combined with higher flag leaf area are among the factors underlying the improved productivity of NIL-7A-B-2. These were coupled with improved sink capacity in NIL-7A-B-2, manifested by greater yield components than its parental line. This study provides further support for our previous findings that introgression of wild emmer QTL alleles, using marker assisted selection, can enhance grain yield and biomass production across environments in domesticated wheat, thereby enriching the modern gene pool with essential diversity for the improvement of yield and drought resistance.

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KW - Leaf gas exchange

KW - Near-isogenic line

KW - Quantitative trait locus

KW - Triticum turgidum ssp. dicoccoides

KW - Water stress

KW - Water-use efficiency

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SN - 0168-9452

VL - 251

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JO - Plant Science

JF - Plant Science

ER -

Ancestral QTL alleles from wild emmer wheat improve grain yield, biomass and photosynthesis across enviroinments in modern wheat

Abstract

Bibliographical note

Keywords

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