Longer epidermal cells underlie a quantitative source of variation in wheat flag leaf size

Détails bibliographiques
Publié dans:	The New phytologist. - 1979. - 237(2023), 5 vom: 15. März, Seite 1558-1573
Auteur principal:	Zanella, Camila M (Auteur)
Autres auteurs:	Rotondo, Marilena, McCormick-Barnes, Charlie, Mellers, Greg, Corsi, Beatrice, Berry, Simon, Ciccone, Giulia, Day, Rob, Faralli, Michele, Galle, Alexander, Gardner, Keith A, Jacobs, John, Ober, Eric S, Sánchez Del Rio, Ana, Van Rie, Jeroen, Lawson, Tracy, Cockram, James
Format:	Article en ligne
Langue:	English
Publié:	2023
Accès à la collection:	The New phytologist
Sujets:	Journal Article Research Support, Non-U.S. Gov't flag leaf morphology haplotype analysis maximum stomatal conductance (Gsmax) multifounder advanced generation intercross population quantitative trait variation wheat (Triticum aestivum L.)

Description
Résumé:	© 2022 The Authors New Phytologist © 2022 New Phytologist Foundation. The wheat flag leaf is the main contributor of photosynthetic assimilates to developing grains. Understanding how canopy architecture strategies affect source strength and yield will aid improved crop design. We used an eight-founder population to investigate the genetic architecture of flag leaf area, length, width and angle in European wheat. For the strongest genetic locus identified, we subsequently created a near-isogenic line (NIL) pair for more detailed investigation across seven test environments. Genetic control of traits investigated was highly polygenic, with colocalisation of replicated quantitative trait loci (QTL) for one or more traits identifying 24 loci. For QTL QFll.niab-5A.1 (FLL5A), development of a NIL pair found the FLL5A+ allele commonly conferred a c. 7% increase in flag and second leaf length and a more erect leaf angle, resulting in higher flag and/or second leaf area. Increased FLL5A-mediated flag leaf length was associated with: (1) longer pavement cells and (2) larger stomata at lower density, with a trend for decreased maximum stomatal conductance (Gsmax ) per unit leaf area. For FLL5A, cell size rather than number predominantly determined leaf length. The observed trade-offs between leaf size and stomatal morphology highlight the need for future studies to consider these traits at the whole-leaf level
Description:	Date Completed 03.02.2023 Date Revised 19.04.2023 published: Print-Electronic Citation Status MEDLINE
ISSN:	1469-8137
DOI:	10.1111/nph.18676