Abstract
Identifying yield and grain plumpness QTL that are independent of developmental variation or phenology is of paramount importance for developing widely adapted and stable varieties through the application of marker assisted selection. The current study was designed to dissect the genetic basis of yield performance and grain plumpness in southern Australia using three doubled haploid (DH) populations developed from crosses between adapted parents that are similar in maturity and overall plant development. Three interconnected genetic populations, Commander x Fleet (CF), Commander x WI4304 (CW), and Fleet x WI4304 (FW) developed from crossing of Australian elite barley genotypes, were used to map QTL controlling yield and grain plumpness. QTL for grain plumpness and yield were analysed using genetic linkage maps made of genotyping-by-sequencing markers and major phenology genes, and field trials at three drought prone environments for two growing seasons. Seventeen QTL were detected for grain plumpness. Eighteen yield QTL explaining from 1.2% to 25.0% of the phenotypic variation were found across populations and environments. Significant QTL x environment interaction was observed for all grain plumpness and yield QTL, except QPlum.FW-4H.1 and QYld.FW-2H.1. Unlike previous yield QTL studies in barley, none of the major developmental genes, including Ppd-H1, Vrn-H1, Vrn-H2 and Vrn-H3, that drive barley adaption significantly affected grain plumpness and yield here. Twenty-two QTL controlled yield or grain plumpness independently of known maturity QTL or genes. Adjustment for maturity effects through co-variance analysis had no major effect on these yield QTL indicating that they control yield per se.
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Claims 6
Claim · model-written summary
Seventeen QTL were detected for barley grain plumpness.
- Taxon
- barley
.jpg?width=60)
Hordeum vulgaree0 - Outcome
- grain plumpnesse1
- Value
- Seventeen QTLe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“developed from crossing of Australian elite barley genotypes”
e1“Seventeen QTL were detected for grain plumpness”
Claim · model-written summary
Eighteen yield QTL explain 1.2% to 25.0% of phenotypic variation in barley across populations and environments.
- Taxon
- barleyHordeum vulgaree0
- Outcome
- Eighteen yield QTLe2
- Value
- 1.2% to 25.0%e2
- Qualifier
- across populations and environmentse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“developed from crossing of Australian elite barley genotypes”
e2“Eighteen yield QTL explaining from 1.2% to 25.0% of the phenotypic variation were found across populations and environments”
Claim · model-written summary
QTL x environment interaction is significant for barley grain plumpness and yield QTL, except QPlum.FW-4H.1 and QYld.FW-2H.1.
- Taxon
- barleyHordeum vulgaree0
- Outcome
- QTL x environment interactione3
- Qualifier
- except QPlum.FW-4H.1 and QYld.FW-2H.1e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“developed from crossing of Australian elite barley genotypes”
e3“Significant QTL x environment interaction was observed for all grain plumpness and yield QTL, except QPlum.FW-4H.1 and QYld.FW-2H.1”
Claim · model-written summary
Major developmental genes Ppd-H1, Vrn-H1, Vrn-H2 and Vrn-H3 do not significantly affect barley grain plumpness and yield.
- Taxon
- barleyHordeum vulgaree0
- Gene
- Ppd-H1, Vrn-H1, Vrn-H2 and Vrn-H3e4
- Outcome
- grain plumpness and yielde4
- Direction
- no_changeinferrede4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“developed from crossing of Australian elite barley genotypes”
e4“none of the major developmental genes, including Ppd-H1, Vrn-H1, Vrn-H2 and Vrn-H3, that drive barley adaption significantly affected grain plumpness and yield here”
Claim · model-written summary
Twenty-two QTL control barley yield or grain plumpness independently of known maturity QTL or genes.
- Taxon
- barleyHordeum vulgaree0
- Outcome
- yield or grain plumpnesse5
- Value
- Twenty-two QTLe5
- Qualifier
- independently of known maturity QTL or genese5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“developed from crossing of Australian elite barley genotypes”
e5“Twenty-two QTL controlled yield or grain plumpness independently of known maturity QTL or genes”
Claim · model-written summary
Adjusting for maturity effects has no major effect on barley yield QTL.
- Taxon
- barleyHordeum vulgaree0
- Treatment
- Adjustment for maturity effects through co-variance analysise6
- Outcome
- yield QTLe6
- Direction
- no_changeinferrede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“developed from crossing of Australian elite barley genotypes”
e6“Adjustment for maturity effects through co-variance analysis had no major effect on these yield QTL”
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