Candidate genes underlying QTL for flowering time and their interactions in a wide spring barley(Hordeum vulgare L.) cross  

作　　者：Ana M.Casas Carlota R.Gazulla Arantxa Monteagudo Carlos P.Cantalapiedra Marian Moralejo MPilar Gracia Francisco J.Ciudad William T.B.Thomas Jose L.Molina-Cano Scott Boden Bruno Contreras-Moreira Ernesto Igartua 

机构地区：[1]Department of Genetics and Plant Production,Aula Dei Experimental Station(EEAD-CSIC),Avda Montanana 1005,E-50059 Zaragoza,Spain [2]University of Lleida-AGROTECNIO Center,Avda.Rovira Roure 191,25198 Lleida,Spain [3]Instituto de Tecnologia Agraria,Junta de Castilla y Leon,ITACyL,P.O.Box 172,47071 Valladolid,Spain [4]The James Hutton Institute,Invergowrie,Dundee DD25DA,UK [5]Institut de Recerca i Tecnologia Agroalimentaries(UdL-IRTA),Avda Rovira Roure 191,25198 Lleida,Spain [6]John Innes Centre,Norwich Research Park,Norwich NR47UH,UK [7]Fundacion ARAID,calle Maria de Luna 11,50018 Zaragoza,Spain [8]Present address:Centro de Biotecnologia y Genomica de Plantas,Universidad Politecnica de Madrid(UPM)and Instituto Nacional de Investigacion y Tecnologia Agraria y Alimentaria(INIA),Madrid 28223,Spain [9]Present address:School of Agriculture,Food and Wine,Waite Research Institute,University of Adelaide,Glen Osmond,SA 5064,Australia [10]Present address:The European Bioinformatics Institute(EMBL-EBI),Wellcome Trust Genome Campus,Hinxton,UK

出　　处：《The Crop Journal》2021年第4期862-872,共11页作物学报（英文版）

基　　金：supported by the Spanish Ministry of Economy and Competitiveness(grant numbers AGL2010-21929 and AGL2013-48756-R);the Spanish Ministry of Economy and Competitiveness,the Agencia Estatal de Investigación,and the European Regional Development Fund(grant number AGL2016–80967-R);Government of Aragon(Research Group A08_20R)。

摘　　要：Response to vernalization and photoperiod are the main determinants controlling the time to flowering in temperate cereals. While the individual genes that determine a plant's response to these environmental signals are well characterized, the combinatorial effect on flowering time of allelic variants for multiple genes remains unresolved. This study investigated the genetic control of flowering-time in a biparental population of spring barley, derived from a wide cross between a late-flowering European and an early-flowering North-American cultivar. While the major flowering time genes are not segregating in the Beka ×Logan cross, large variation in flowering was observed. We identified five QTL, with both parents found to contribute early alleles. The catalog of QTL discovered aligns with several candidate genes affecting flowering time in barley. The combination of particular alleles at HvCEN, HvELF3 and HvFT1 in Logan are responsible for the earliness of this cultivar. Interestingly, earliness for flowering could be further enhanced, with Beka found to contribute three early alleles, including a QTL colocating with a HvFD-like gene, suggesting that there are diverse aspects of the flowering-time pathway that have been manipulated in these two cultivars. Epistatic interactions between flowering-time QTL or candidate genes were observed in field data and confirmed under controlled conditions. The results of this study link photoperiod-dependent flowering-time genes with earliness per se genes into a single model, thus providing a unique framework that can be used by geneticists and breeders to optimize flowering time in barley.

关 键 词：BARLEY FLOWERING HvELF3 HvCEN HvFT1 

分 类 号：S512.3[农业科学—作物学]