Abstract
Summary Advanced backcross QTL (AB‐QTL) analysis was deployed to identify allelic variation in wild barley ( Hordeum vulgare ssp. spontaneum ) of value in the improvement of grain yield and other agronomically important traits in barley ( Hordeum vulgare ssp. vulgare ) grown under conditions of water deficit in Mediterranean countries. A population of 123 double haploid (DH) lines obtained from BC 1 F 2 plants derived from a cross between Barke (European two‐row cultivar) and HOR11508 (wild barley accession) were tested in replicated field trials, under varying conditions of water availability in Italy, Morocco and Tunisia, for seven quantitative traits. Significant QTL effects at one ( P 0.001) or more trial sites ( P 0.01) were identified for all traits. At 42 (52%) of the 80 putative QTLs identified, the allele increasing a “traits' value” was contributed by H. spontaneum . For example, though the majority (67%) of QTL alleles increasing grain yield were contributed by H. vulgare, H. spontaneum contributed the alleles increasing grain yield at six regions on chromosomes 2H, 3H, 5H and 7H. Among them, two QTLs (associated to Bmac0093 on chromosome 2H and to Bmac0684 on chromosome 5H) were identified in all three locations and had the highest additive effects. The present study shows the validity of deploying AB‐QTL analysis for identifying favourable QTL alleles from wild germplasm and indicates its potential as an enhancement strategy for the genetic improvement of cultivars better adapted to drought‐prone environments.
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Claims 6
Claim · model-written summary
Significant QTL effects occurred for all traits.
- Taxon
- barley
.jpg?width=60)
Hordeum vulgaret0 - Outcome
- QTL effectse0
- Setting
- trial sitese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Significant QTL effects at one ( P 0.001) or more trial sites ( P 0.01) were identified for all traits”
t0“barley”
Claim · model-written summary
Wild barley supplied increasing alleles at 42 of 80 QTLs.
- Taxon
- barleyHordeum vulgaret0
- Outcome
- allele increasing a “traits’ value”e0
- Direction
- increasinge0
- Value
- 42 (52%) of the 80 putative QTLse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At 42 (52%) of the 80 putative QTLs identified, the allele increasing a “traits’ value” was contributed by H. spontaneum”
t0“barley”
Claim · model-written summary
Cultivated barley supplied most yield-increasing alleles.
- Taxon
- barleyHordeum vulgaret0
- Outcome
- QTL alleles increasing grain yielde0
- Direction
- increasinge0
- Value
- 67%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the majority (67%) of QTL alleles increasing grain yield were contributed by H. vulgare”
t0“barley”
Claim · model-written summary
Wild barley contributed yield-increasing alleles at six regions.
- Taxon
- barleyHordeum vulgaret0
- Outcome
- alleles increasing grain yielde0
- Direction
- increasinge0
- Value
- six regionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“H. spontaneum contributed the alleles increasing grain yield at six regions on chromosomes 2H, 3H, 5H and 7H”
t0“barley”
Claim · model-written summary
Two major QTLs were found across all three locations.
- Taxon
- barleyHordeum vulgaret0
- Gene
- Bmac0093e0
- Outcome
- highest additive effectse0
- Value
- two QTLse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two QTLs (associated to Bmac0093 on chromosome 2H and to Bmac0684 on chromosome 5H) were identified in all three locations and had the highest additive effects”
t0“barley”
Claim · model-written summary
AB-QTL analysis identified favourable wild alleles for improvement.
- Taxon
- barleyHordeum vulgaret0
- Outcome
- validity of deploying AB‐QTL analysise0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The present study shows the validity of deploying AB‐QTL analysis for identifying favourable QTL alleles from wild germplasm”
t0“barley”