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Multi-scale high-throughput phenotyping of apple architectural and functional traits in orchard reveals genotypic variability under contrasted watering regimes

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Horticulture Research 2019年第1期6卷 1015-1029页

作者： Aude Coupel-Ledru Benoit Pallas Magalie Delalande frederic boudon Emma Carrie Sebastien Martinez Jean-Luc Regnard Evelyne Costes UMR AGAP Univ MontpellierCIRADINRAMontpellier SupAgro34398 Montpellier Cedex 5France CIRAD 34398 Montpellier Cedex 5France University of Bristol School of Biological SciencesLife Science Building24 Tyndall AvenueBristol BS81TQUK

Despite previous reports on the genotypic variation of architectural and functional traits in fruit trees,phenotyping large populations in the field remains *** this study,we used high-throughput phenotyping methods on an apple tree core-collection(1000 individuals)grown under contrasted watering ***,architectural phenotyping was achieved using T-LiDAR scans for estimating convex and alpha hull volumes and the silhouette to total leaf area ratio(STAR).Second,a semi-empirical index(IPL)was computed from chlorophyll fluorescence measurements,as a proxy for leaf ***,thermal infrared and multispectral airborne imaging was used for computing canopy temperature variations,water deficit,and vegetation *** traits estimated by these methods were compared to low-throughput in planta *** indices and alpha hull volumes were significantly correlated with tree leaf area and trunk cross sectional area,while IPL values showed strong correlations with photosynthesis measurements collected on an independent leaf *** contrast,correlations between stomatal conductance and canopy temperature estimated from airborne images were lower,emphasizing discrepancies across measurement *** heritability values were obtained for almost all the traits except leaf photosynthesis,likely due to large intra-tree *** means were used in a clustering procedure that defined six classes of architectural and functional *** between groups showed several combinations between architectural and functional traits,suggesting independent genetic *** study demonstrates the feasibility and relevance of combining multi-scale high-throughput methods and paves the way to explore the genetic bases of architectural and functional variations in woody crops in field conditions.

关键词： architectural traits functional

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