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A regulator of early flowering in barley (Hordeum vulgare L.)


Ibrahim, A and Harrison, M and Meinke, H and Fan, Y and Johnson, P and Zhou, M, A regulator of early flowering in barley (Hordeum vulgare L.), PLoS One, 13, (7) Article e0200722. ISSN 1932-6203 (2018) [Refereed Article]


Copyright Statement

Copyright 2018 Ibrahim et al. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0)

DOI: doi:10.1371/journal.pone.0200722


Heading date (HD) of cereals is an important trait for adaptation to diverse environments and is critical for determining yield and quality and the number of genes and gene combinations that confer earliness in barley under short days is limited. In our study, a QTL for early flowering was identified from the cross between an Australian malting barley cultivar and a Chinese landrace. Four sets of near isogenic lines (NILs) were developed with a QTL located on chromosome 5H at the interval of 122.0129.0 cM. Further experiments were conducted to investigate how this gene was regulated by photoperiod using the NILs with three sowing dates from autumn to summer. The NILs carrying the earliness allele were significantly earlier than the late genotype at all sowing dates. This gene was different from previously reported vernalisation genes that are located at a similar position as no vernalisation was required for all the NILs. The difference between this gene and Eam5 (HvPHYC) locus which also located between two co-segregated markers (3398516S5, 122.5 cM, and 4014046D5, 126.1 cM), is that with the existence of Ppd-H1 (Eam1), Eam5 has no effect on ear emergence under long days while the gene from TX9425 still reduced the time to ear emergency. The locus showed no pleiotropic effects on grain pasting properties and agronomic traits except for spike length and number of spikelets per spike, and thus can be effectively used in breeding programs. The array of early heading dates caused by interactions of Eam5 gene with other maturity genes provides an opportunity to better fine tune heading dates with production environments, which can be critical factor in barley breeding.

Item Details

Item Type:Refereed Article
Keywords:Barley, breeding, drought tolerance, drought resistence, gene, genotype, landrace, anthesis, heading date
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Crop and pasture production
Research Field:Crop and pasture improvement (incl. selection and breeding)
Objective Division:Plant Production and Plant Primary Products
Objective Group:Grains and seeds
Objective Field:Barley
UTAS Author:Ibrahim, A (Mr Ahmed Ibrahim)
UTAS Author:Harrison, M (Associate Professor Matthew Harrison)
UTAS Author:Meinke, H (Professor Holger Meinke)
UTAS Author:Fan, Y (Miss Yun Fan)
UTAS Author:Johnson, P (Dr Peter Johnson)
UTAS Author:Zhou, M (Professor Meixue Zhou)
ID Code:127328
Year Published:2018
Web of Science® Times Cited:13
Deposited By:TIA - Research Institute
Deposited On:2018-07-22
Last Modified:2019-03-20
Downloads:72 View Download Statistics

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