QTL mapping of genes controlling ear emergence time and plant height on chromosome 5A of wheat

Kato, Ken; Miura, H.; Sawada, S.

doi:10.1007/s001220051094

Cited by 125 publications

(88 citation statements)

References 8 publications

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“…Our study confirms previous findings that the 5AQ/q genes influence numerous domestication traits (23,25,34,37,38), and it shows that along with the 5AQ/q alleles, the 5Dq and 5Bq alleles contribute to speltoid suppression, but their function depends on the allelic state of 5AQ/q. The contribution of 5Bq to these traits is indirect because it is a pseudogene, but we demonstrated that its deletion significantly reduced transcription of 5Dq.…”

Section: Discussionsupporting

confidence: 92%

Duplication and partitioning in evolution and function of homoeologous Q loci governing domestication characters in polyploid wheat

Zhang

Belcram

Górnicki

et al. 2011

Proc. Natl. Acad. Sci. U.S.A.

149

125

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The Q gene encodes an AP2 -like transcription factor that played an important role in domestication of polyploid wheat. The chromosome 5A Q alleles ( 5AQ and 5Aq ) have been well studied, but much less is known about the q alleles on wheat homoeologous chromosomes 5B ( 5Bq ) and 5D ( 5Dq ). We investigated the organization, evolution, and function of the Q/q homoeoalleles in hexaploid wheat ( Triticum aestivum L.). Q/q gene sequences are highly conserved within and among the A, B, and D genomes of hexaploid wheat, the A and B genomes of tetraploid wheat, and the A, S, and D genomes of the diploid progenitors, but the intergenic regions of the Q/q locus are highly divergent among homoeologous genomes. Duplication of the q gene 5.8 Mya was likely followed by selective loss of one of the copies from the A genome progenitor and the other copy from the B, D, and S genomes. A recent V 329 -to-I mutation in the A lineage is correlated with the Q phenotype. The 5Bq homoeoalleles became a pseudogene after allotetraploidization. Expression analysis indicated that the homoeoalleles are coregulated in a complex manner. Combined phenotypic and expression analysis indicated that, whereas 5AQ plays a major role in conferring domestication-related traits, 5Dq contributes directly and 5Bq indirectly to suppression of the speltoid phenotype. The evolution of the Q/q loci in polyploid wheat resulted in the hyperfunctionalization of 5AQ , pseudogenization of 5Bq , and subfunctionalization of 5Dq , all contributing to the domestication traits.

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Section: Discussionsupporting

confidence: 92%

Duplication and partitioning in evolution and function of homoeologous Q loci governing domestication characters in polyploid wheat

Zhang

Belcram

Górnicki

et al. 2011

Proc. Natl. Acad. Sci. U.S.A.

149

125

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“…Thus, this locus could represent the orthologous gene to eps2S. Although Kato et al (1999) reported a locus for narrow-sense earliness on 5A of hexaploid wheat, we could not find any loci for this character on group 5 chromosomes in the present study.…”

Section: Discussioncontrasting

confidence: 70%

Segregation analysis of heading traits in hexaploid wheat utilizing recombinant inbred lines

2003

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The purpose of this study was to analyze the genetic segregation of heading traits in wheat using recombinant inbred lines (RILs) of hexaploid wheat, derived from Triticum aestivum cv. Chinese Spring and T. spelta var. duhameliamum. The population was examined under controlled environmental conditions as well as in the field. This strategy differentiated the effect of three genetic factors (vernalization requirement, photoperiod sensitivity and narrow-sense earliness) and identified their interactions. Correlation analysis showed that photoperiod sensitivity and narrow-sense earliness are critical for heading time in the field. Single-marker analysis using 322 molecular markers segregating among RIL detected a total of 38 linked markers for each genetic factor and heading in the field. In interval analysis, two Vrn genes (Vrn-B1 and Vrn-D1) and Ppd-B1 were mapped on chromosomes 5B, 5D and 2B, respectively. It was noticed that Vrn-B1 on 5B from the spelt wheat conferred a strongspring habit equivalent to the homoeologous Vrn-A1. Quantitative trait locus analysis also showed that Ppd-B1 was not detected under the short-day condition without vernalization treatment, and that there were two types of genes for photoperiod sensitivity, dependent on and independent of vernalization treatment.

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“…As mentioned previously, Pugsley (1983) and White and Hoogenboom (2003) have suggested that wheat phenology could be largely explained by genes controlling plant height (Rht), photoperiod (Ppd), and vernalization (Vrn). Certainly progress has been made in mapping (Laurie, 1997;Shah et al, 1999;Kato et al, 1999;Sourdille et al, 2000;Iwaki et al, 2002;Toth et al, 2003) and cloning (Danyluk et al, 2003;Peng et al, 1999;Trevaskis et al, 2003;Yan et al, , 2004 these genes. In addition, some of the necessary information on the physiological aspects of these genes may be obtained from other genera.…”

Section: Plant Height Genesmentioning

confidence: 99%

Putting genes into genetic coefficients

Baenziger

McMaster²,

Wilhelm³

et al. 2004

Field Crops Research

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Plant parameters are critical inputs in crop simulation models and allow a general set of algorithms to represent features of specific cultivars. A subset of plant parameters is often referred to as ''genetic coefficients''. However, these genetic coefficients are developed from phenotypic observations, usually have a weak genetic basis, and are at best ''genotypic'' coefficients because they consider the genotype from a very integrative perspective and likely include some impact of environment on the trait or characteristic described. With increased understanding of crop genomes, we believe models can be improved by incorporating genetic coefficients that accurately describe the action of specific genes (within the genome) and therefore better represent the association between gene function and plant phenotype in simulation models. As an example, we discuss how knowledge of height genes in wheat (Triticum aestivum L.) cultivars, along with stronger genetic and environmental response algorithms, could substitute for the phenotypic parameter ''height class'' in the model SHOOTGRO. We also demonstrate how models containing responses based on known genetic variation can be used to identify traits to incorporate into cultivars better adapted to future climate scenarios. It remains for the geneticist, plant breeder, physiologist and modeler to cooperate and communicate with each other so that genetic information and responses with the genotype and environment and their interaction can be described in models and used to develop cultivars better able to exploit future climatic conditions. #

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QTL mapping of genes controlling ear emergence time and plant height on chromosome 5A of wheat

Cited by 125 publications

References 8 publications

Duplication and partitioning in evolution and function of homoeologous Q loci governing domestication characters in polyploid wheat

Duplication and partitioning in evolution and function of homoeologous Q loci governing domestication characters in polyploid wheat

Segregation analysis of heading traits in hexaploid wheat utilizing recombinant inbred lines

Putting genes into genetic coefficients

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