Dissection of quantitative trait loci for root characters and day length sensitivity in SynOpDH wheat ( Triticum aestivum L.) bi-parental mapping population
The genetics of the root system is still not dissected for wheat and lack of knowledge prohibits the use of marker-assisted selection in breeding. To understand the genetic mechanism of root development, Synthetic W7984 × Opata M85 doubled-haploid (SynOpDH) mapping population was evaluated for root...
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| Veröffentlicht in: | Plant genetic resources: characterization and utilization 2020-06, Vol.18 (3), p.130-142 |
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| creator | Bektas, Harun Hohn, Christopher Earl Waines, John Giles |
| description | The genetics of the root system is still not dissected for wheat and lack of knowledge prohibits the use of marker-assisted selection in breeding. To understand the genetic mechanism of root development, Synthetic W7984 × Opata M85 doubled-haploid (SynOpDH) mapping population was evaluated for root and shoot characteristics in PVC tubes until maturity. Two major quantitative trait loci (QTLs) for total root biomass were detected on homoeologous chromosomes 2A and 2D with logarithm of the odds scores between 6.25–10.9 and 11.8–20.86, and total phenotypic effects between 12.7–17.7 and 26.6–40.04% in 2013 and 2014, respectively. There was a strong correlation between days to anthesis and root and shoot biomass accumulation (0.50–0.81). The QTL for biomass traits on chromosome 2D co-locates with QTL for days to anthesis. The effect of extended vegetative growth, caused by photoperiod sensitivity (
Ppd
) genes, on biomass accumulation was always hypothesized, this is the first study to genetically support this theory. |
| doi_str_mv | 10.1017/S1479262120000192 |
| format | Article |
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Ppd
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Ppd
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To understand the genetic mechanism of root development, Synthetic W7984 × Opata M85 doubled-haploid (SynOpDH) mapping population was evaluated for root and shoot characteristics in PVC tubes until maturity. Two major quantitative trait loci (QTLs) for total root biomass were detected on homoeologous chromosomes 2A and 2D with logarithm of the odds scores between 6.25–10.9 and 11.8–20.86, and total phenotypic effects between 12.7–17.7 and 26.6–40.04% in 2013 and 2014, respectively. There was a strong correlation between days to anthesis and root and shoot biomass accumulation (0.50–0.81). The QTL for biomass traits on chromosome 2D co-locates with QTL for days to anthesis. The effect of extended vegetative growth, caused by photoperiod sensitivity (
Ppd
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| subjects | Accumulation Biomass Chromosomes Drought Gene mapping Genetics Genomes Genotype & phenotype Mapping Marker-assisted selection Population Population genetics Quantitative trait loci Root development Seeds Sensitivity Software packages Tubes Variance analysis Wheat |
| title | Dissection of quantitative trait loci for root characters and day length sensitivity in SynOpDH wheat ( Triticum aestivum L.) bi-parental mapping population |
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