Meta-QTL analysis of the genetic control of ear emergence in elite European winter wheat germplasm

Griffiths, Simon; Simmonds, James; Leverington, Michelle; Wang, Yingkun; Fish, Lesley; Sayers, Liz; Alibert, Leodie; Orford, Simon; Wingen, Luzie U.; Herry, Laurence; Faure, Sébastien; Laurie, D. A.; Bilham, Lorelei; Snape, J. W.

doi:10.1007/s00122-009-1046-x

Cited by 230 publications

(199 citation statements)

References 31 publications

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“…In this study, a region on 1AL was associated with earlier flowering and reduced height; it appears to be the same as the anthesis QTL region identified by Kuchel et al (2006). The regions on 1BS, 3BS and 7AS appear to be the same as the heading date QTL region identified by Griffiths et al (2009); in our study, all three regions are associated with earlier flowering, in addition to both positive and negative effects on GW and GY. The region on 5AS appears to be the same as that identified as containing QTLs for grain weight and grain yield (Marza et al 2006), and heading date (Griffiths et al 2009); in our study, the region was associated with anthesis, GW and HT.…”

Section: Comparative Analyses Confirm Preferential Retention Of Chromsupporting

confidence: 74%

“…The regions on 1BS, 3BS and 7AS appear to be the same as the heading date QTL region identified by Griffiths et al (2009); in our study, all three regions are associated with earlier flowering, in addition to both positive and negative effects on GW and GY. The region on 5AS appears to be the same as that identified as containing QTLs for grain weight and grain yield (Marza et al 2006), and heading date (Griffiths et al 2009); in our study, the region was associated with anthesis, GW and HT. Similarly, the preferentially retained region on 5BL appears to be the same region identified as containing QTLs for yield (Quarrie et al 2006) and heading date (Griffiths et al 2009), but is proximal to Vrn-B1; in this study, the region was associated with GW and GY.…”

Section: Comparative Analyses Confirm Preferential Retention Of Chromsupporting

confidence: 70%

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Preferential retention of chromosome regions in derived synthetic wheat lines: a source of novel alleles for wheat improvement

McIntyre

Rattey

Kilian³

et al. 2014

Crop Pasture Sci.

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Abstract. Synthetic hexaploid wheats (SHWs) and their synthetic derivative lines (SDLs) are being used as a means of introducing novel genetic variation into bread wheat (BW). Phenotypic information for days to flowering, height, grain weight and grain yield was collected from multiple environments for three SDL families, each with~50 lines, and their elite BW parents. In general, the SDLs were earlier flowering and taller with larger grain size, but similar grain yield to the BWs. The three SDL families and their SHW and BW parents were genotyped using mapped DArT (diversity arrays technology) markers. Within each SDL family, SHW-specific DArT markers were used to identify SHW-derived chromosomal regions that appeared to be preferentially retained in the SDL families, as determined by retention at frequencies >0.25, the expected frequency for Mendelian segregation. Regions on chromosomes 2BS and 7BL appeared to be preferentially retained in all three SDL families, while regions on chromosomes 1AL, 1BS, 3BS, 5AS, 5BL, and 7AS were preferentially retained in two of the three SDL families. Other regions were preferentially retained in single families only, including some regions located on the D genome. Single-marker regression analysis was performed using the preferentially retained markers and identified markers and regions that were significantly associated with one or more of the four traits measured. Comparative mapping also indicates that these preferentially retained markers and chromosome regions may co-locate with previously identified QTLs for anthesis, height, grain weight and/or grain yield. Therefore, SHWs may contain novel alleles at these loci in these regions for these traits, which may provide a selective advantage to the SDLs. This approach could provide a useful method for identifying chromosomal regions of interest with potentially novel alleles for introgression for further BW improvement.

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Section: Comparative Analyses Confirm Preferential Retention Of Chromsupporting

confidence: 74%

Section: Comparative Analyses Confirm Preferential Retention Of Chromsupporting

confidence: 70%

Preferential retention of chromosome regions in derived synthetic wheat lines: a source of novel alleles for wheat improvement

McIntyre

Rattey

Kilian³

et al. 2014

Crop Pasture Sci.

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“…Dominant alleles of the Ppd-1 loci more markedly affect earliness of HT, FLT and MAT than do the Vrn-1 loci in the wheat mapping populations. The narrow-sense earliness genes are thought to be involved in the fine-tuning of wheat flowering (Griffiths et al, 2009;Zikhali et al, 2014), and allelic divergence in a narrow-sense earliness gene results in a one-to five-day difference in flowering time in wheat (Valarik et al, 2006;Zikhali et al, 2014). The KU-2097-derived alleles of the 5D and 6D QTLs for HT showed a significantly earlyflowering phenotype under ppd-D1 recessive conditions (Fig.…”

Section: Discussionmentioning

confidence: 99%

Quantitative trait locus analysis for flowering-related traits using two F<sub>2</sub> populations derived from crosses between Japanese common wheat cultivars and synthetic hexaploids

et al. 2015

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Flowering time is an important trait for Japanese wheat breeding. Aegilops tauschii, the D-genome donor of hexaploid wheat, is a useful resource to enlarge the D-genome diversity of common wheat. Previously, we identified floweringrelated QTLs in F 2 populations of synthetic hexaploid wheat lines between the tetraploid wheat cultivar Langdon and Ae. tauschii accessions. Here, to evaluate the usefulness of the early-flowering alleles from Ae. tauschii for Japanese wheat breeding, QTL analyses were conducted in two F 2 populations derived from crosses between Japanese wheat cultivars and early-flowering lines of synthetic hexaploid wheat. Only two chromosomal regions controlling flowering-related traits were identified, on chromosomes 2DS and 5AL in the mapping populations, and no previously identified QTLs were found in the synthetic hexaploid lines. The strong effect of the 2DS QTL, putatively corresponding to Ppd-D1, was considered to hide any significant expression of other QTLs with small effects on flowering-related traits. When F 2 individuals carrying Ae. tauschii-homozygous alleles around the 2DS QTL region were selected, the Ae. tauschii-derived alleles of the previously identified flowering QTLs partly showed an early-flowering phenotype compared with the Japanese wheat-derived alleles. Thus, some early-flowering alleles from Ae. tauschii may be useful for production of early-flowering Japanese wheat cultivars.

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“…The DH populations and genetics maps used in this study were generated as was described previously (Snape et al, 2007;Griffiths et al, 2009) and summarized in Table 1. Specifically, they are as follows: Avalon 3 Cadenza (AxC), Beaver 3 Soissons (BxS), Shamrock 3 Shango (SxS), Spark 3 Rialto (SpxR), Malacca 3 Charger (MxC), and Savannah 3 Rialto (SaxR).…”

Section: Genetic Resources and Field Trialsmentioning

confidence: 99%

A Genetic Framework for Grain Size and Shape Variation in Wheat

et al. 2010

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Grain morphology in wheat (Triticum aestivum) has been selected and manipulated even in very early agrarian societies and remains a major breeding target. We undertook a large-scale quantitative analysis to determine the genetic basis of the phenotypic diversity in wheat grain morphology. A high-throughput method was used to capture grain size and shape variation in multiple mapping populations, elite varieties, and a broad collection of ancestral wheat species. This analysis reveals that grain size and shape are largely independent traits in both primitive wheat and in modern varieties. This phenotypic structure was retained across the mapping populations studied, suggesting that these traits are under the control of a limited number of discrete genetic components. We identified the underlying genes as quantitative trait loci that are distinct for grain size and shape and are largely shared between the different mapping populations. Moreover, our results show a significant reduction of phenotypic variation in grain shape in the modern germplasm pool compared with the ancestral wheat species, probably as a result of a relatively recent bottleneck. Therefore, this study provides the genetic underpinnings of an emerging phenotypic model where wheat domestication has transformed a long thin primitive grain to a wider and shorter modern grain.

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Meta-QTL analysis of the genetic control of ear emergence in elite European winter wheat germplasm

Cited by 230 publications

References 31 publications

Preferential retention of chromosome regions in derived synthetic wheat lines: a source of novel alleles for wheat improvement

Preferential retention of chromosome regions in derived synthetic wheat lines: a source of novel alleles for wheat improvement

Quantitative trait locus analysis for flowering-related traits using two F<sub>2</sub> populations derived from crosses between Japanese common wheat cultivars and synthetic hexaploids

A Genetic Framework for Grain Size and Shape Variation in Wheat

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