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Djabali Y, Rincent R, Martin ML, Blein-Nicolas M. Plasticity QTLs specifically contribute to the genotype × water availability interaction in maize. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2023; 136:228. [PMID: 37855950 DOI: 10.1007/s00122-023-04458-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Accepted: 08/31/2023] [Indexed: 10/20/2023]
Abstract
KEY MESSAGE Multi-trial genome wide association study of plasticity indices allow to detect QTLs specifically involved in the genotype x water availability interaction. Concerns regarding high maize yield losses due to increasing occurrences of drought events are growing, and breeders are still looking for molecular markers for drought tolerance. However, the genetic determinism of traits in response to drought is highly complex and identification of causal regions is a tremendous task. Here, we exploit the phenotypic data obtained from four trials carried out on a phenotyping platform, where a diversity panel of 254 maize hybrids was grown under well-watered and water deficit conditions, to investigate the genetic bases of the drought response in maize. To dissociate drought effect from other environmental factors, we performed multi-trial genome-wide association study on well-watered and water deficit phenotypic means, and on phenotypic plasticity indices computed from measurements made for six ecophysiological traits. We identify 102 QTLs and 40 plasticity QTLs. Most of them were new compared to those obtained from a previous study on the same dataset. Our results show that plasticity QTLs cover genetic regions not identified by QTLs. Furthermore, for all ecophysiological traits, except one, plasticity QTLs are specifically involved in the genotype by water availability interaction, for which they explain between 60 and 100% of the variance. Altogether, QTLs and plasticity QTLs captured more than 75% of the genotype by water availability interaction variance, and allowed to find new genetic regions. Overall, our results demonstrate the importance of considering phenotypic plasticity to decipher the genetic architecture of trait response to stress.
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Affiliation(s)
- Yacine Djabali
- Université Paris-Saclay, CNRS, INRAE, Université Evry, Institute of Plant Sciences Paris-Saclay (IPS2), 91190, Gif-sur-Yvette, France
- Université de Paris Cité, Institute of Plant Sciences Paris-Saclay (IPS2), 91190, Gif-sur-Yvette, France
- Université Paris-Saclay, INRAE, CNRS, AgroParisTech, GQE-Le Moulon, 91190, Gif-Sur-Yvette, France
| | - Renaud Rincent
- Université Paris-Saclay, INRAE, CNRS, AgroParisTech, GQE-Le Moulon, 91190, Gif-Sur-Yvette, France
| | - Marie-Laure Martin
- Université Paris-Saclay, CNRS, INRAE, Université Evry, Institute of Plant Sciences Paris-Saclay (IPS2), 91190, Gif-sur-Yvette, France.
- Université de Paris Cité, Institute of Plant Sciences Paris-Saclay (IPS2), 91190, Gif-sur-Yvette, France.
- Université Paris-Saclay, AgroParisTech, INRAE, UMR MIA Paris-Saclay, 91120, Palaiseau, France.
| | - Mélisande Blein-Nicolas
- Université Paris-Saclay, INRAE, CNRS, AgroParisTech, GQE-Le Moulon, 91190, Gif-Sur-Yvette, France.
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Koch G, Rolland G, Dauzat M, Bédiée A, Baldazzi V, Bertin N, Guédon Y, Granier C. Leaf Production and Expansion: A Generalized Response to Drought Stresses from Cells to Whole Leaf Biomass-A Case Study in the Tomato Compound Leaf. PLANTS (BASEL, SWITZERLAND) 2019; 8:E409. [PMID: 31614737 PMCID: PMC6843756 DOI: 10.3390/plants8100409] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Revised: 10/01/2019] [Accepted: 10/09/2019] [Indexed: 11/30/2022]
Abstract
It is clearly established that there is not a unique response to soil water deficit but that there are as many responses as soil water deficit characteristics: Drought intensity, drought duration, and drought position during plant cycle. For a same soil water deficit, responses can also differ on plant genotype within a same species. In spite of this variability, at least for leaf production and expansion processes, robust tendencies can be extracted from the literature when similar watering regimes are compared. Here, we present response curves and multi-scale dynamics analyses established on tomato plants exposed to different soil water deficit treatments. Results reinforce the trends already observed for other species: Reduction in plant leaf biomass under water stress was due to reduction in individual leaf biomass and areas whereas leaf production and specific leaf area were not affected. The dynamics of leaf expansion was modified both at the leaf and cell scales. Cell division and expansion were reduced by drought treatments as well as the endoreduplication process. Combining response curves analyses together with dynamic analyses of tomato compound leaf growth at different scales not only corroborate results on simple leaf responses to drought but also increases our knowledge on the cellular mechanisms behind leaf growth plasticity.
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Affiliation(s)
- Garance Koch
- Univ Montpellier, INRA, Montpellier SupAgro, LEPSE, 34095 Montpellier, France.
- Unité Plantes et Systèmes de culture Horticoles, INRA, UR 1115 PSH, F-84000 Avignon, France.
| | - Gaëlle Rolland
- Univ Montpellier, INRA, Montpellier SupAgro, LEPSE, 34095 Montpellier, France.
| | - Myriam Dauzat
- Univ Montpellier, INRA, Montpellier SupAgro, LEPSE, 34095 Montpellier, France.
| | - Alexis Bédiée
- Univ Montpellier, INRA, Montpellier SupAgro, LEPSE, 34095 Montpellier, France.
| | - Valentina Baldazzi
- Unité Plantes et Systèmes de culture Horticoles, INRA, UR 1115 PSH, F-84000 Avignon, France.
- Université Côte d'Azur, INRA, CNRS, ISA, 06903 Sophia-Antipolis, France.
- Université Côte d'Azur, INRIA, INRA, CNRS, Sorbonne Université, BIOCORE Team, 06903 Sophia-Antipolis, France.
| | - Nadia Bertin
- Unité Plantes et Systèmes de culture Horticoles, INRA, UR 1115 PSH, F-84000 Avignon, France.
| | - Yann Guédon
- Univ Montpellier, CIRAD, INRA, Montpellier SupAgro, AGAP, 34095 Montpellier, France.
| | - Christine Granier
- Univ Montpellier, INRA, Montpellier SupAgro, LEPSE, 34095 Montpellier, France.
- Univ Montpellier, CIRAD, INRA, Montpellier SupAgro, AGAP, 34095 Montpellier, France.
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Dadshani S, Sharma RC, Baum M, Ogbonnaya FC, Léon J, Ballvora A. Multi-dimensional evaluation of response to salt stress in wheat. PLoS One 2019; 14:e0222659. [PMID: 31568491 PMCID: PMC6768486 DOI: 10.1371/journal.pone.0222659] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Accepted: 09/03/2019] [Indexed: 11/19/2022] Open
Abstract
Soil salinity is a major threat to crop production worldwide. The global climate change is further accelerating the process of soil salinization, particularly in dry areas of the world. Increasing genetic variability of currently used wheat varieties by introgression of exotic alleles/genes from related progenitors' species in breeding programs is an efficient approach to overcome limitations due to the absence of valuable genetic diversity in elite cultivars. Synthetic hexaploid wheat (SHW) is widely regarded as donor of favourable exotic alleles to improve tolerance against biotic and abiotic stresses such as salinity stress. In this study, synthetic backcross lines (SBLs) winter wheat population "Z86", derived from crosses involving synthetic hexaploid wheat Syn86L with German elite winter wheat cultivar Zentos, was evaluated for salinity tolerance at different developmental stages under controlled and field conditions in three growing seasons. High genetic variability was detected across the SBLs and their parents at various growth stages under controlled as well as under salt stress field trials. Greater performance of Zentos over Syn86L was detected at germination stage across all salt treatments and with respect to shoot dry weight (SDW) and root dry weight (RDW) at seedling stage. Whereas for the root length (RL) and the shoot length (SL) Syn86L surpassed the elite cultivar and most of the progenies. Our experiments revealed for almost all traits that some genotypes among the SBLs showed higher performance than their parents. Furthermore, positive transgressive segregations were detected among the SBLs for germination at high salinity levels, as well as for RDW and SDW at seedling stage. Therefore, the studied Z86 population is a suitable population for assessment of salinity stress on morphological and physiological traits at different plant growth stages. The identified SBLs provide a valuable source for genetic gain through recombination of superior alleles that can be directly applied in breeding programs for efficiently breeding cultivars with improved salinity tolerance and desired agronomic traits.
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Affiliation(s)
- Said Dadshani
- INRES Plant Breeding, Rheinische Friedrich-Wilhelms-University, Bonn, Germany
| | - Ram C. Sharma
- International Center for Agricultural Research in the Dry Areas (ICARDA), Tashkent, Uzbekistan
| | - Michael Baum
- International Center for Agricultural Research in the Dry Areas (ICARDA), Rabat, Morocco
| | | | - Jens Léon
- INRES Plant Breeding, Rheinische Friedrich-Wilhelms-University, Bonn, Germany
| | - Agim Ballvora
- INRES Plant Breeding, Rheinische Friedrich-Wilhelms-University, Bonn, Germany
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Varshney RK, Tuberosa R, Tardieu F. Progress in understanding drought tolerance: from alleles to cropping systems. JOURNAL OF EXPERIMENTAL BOTANY 2018; 69:3175-3179. [PMID: 29878257 PMCID: PMC5991209 DOI: 10.1093/jxb/ery187] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Affiliation(s)
- Rajeev K Varshney
- Center of Excellence in Genomics & Systems Biology (CEGSB), International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Hyderabad, India
| | - Roberto Tuberosa
- Department of Agricultural and Food Sciences, University of Bologna, Italy
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