Genetic dissection of adventitious shoot regeneration in roses by employing genome-wide association studies

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  • Vietnam Academy of Agricultural Sciences (Vaas)
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Details

Original languageEnglish
Pages (from-to)1493-1505
Number of pages13
JournalPlant Cell Reports
Volume36
Issue number9
Early online date24 Jun 2017
Publication statusPublished - Sept 2017

Abstract

Key Message: We analysed the capacity to regenerate adventitious shoots in 96 rose genotypes and found 88 SNP markers associated with QTLs, some of which are derived from candidate genes for shoot regeneration. Abstract: In an association panel of 96 rose genotypes previously analysed for petal colour, we conducted a genome-wide association study on the capacity of leaf petioles for direct shoot regeneration. Shoot regeneration rate and shoot ratio (number of shoots/total number of explants) were used as phenotypic descriptors for regeneration capacity. Two independent experiments were carried out with six replicates of ten explants each. We found significant variation between the genotypes ranging from 0.88 to 88.33% for the regeneration rate and from 0.008 to 1.2 for the shoot ratio, which exceeded the rates reported so far. Furthermore, we found 88 SNP markers associated with either the shoot regeneration rate or the shoot ratio. In this association analysis, we found 12 SNP markers from ESTs (expressed sequence tags) matching known candidate genes that are involved in shoot morphogenesis. The best markers explained more than 51% of the variance in the shoot regeneration rate and more than 0.65 of the variance in the shoot regeneration ratio between the homozygote marker classes. The genes underlying some of the best markers such as a GT-transcription factor or an LRR receptor-like protein kinase are novel candidate genes putatively involved in the observed phenotypic differences. The associated markers were mapped to the closely related genome of Fragaria vesca and revealed many distinct clusters, which also comprised the known candidate genes that functioned in the organogenesis of plant shoots. However, the validation of candidate genes and their functional relationship to shoot regeneration require further analysis in independent rose populations and functional analyses.

Keywords

    Genome-wide association study, Rose cultivars, Shoot regeneration, SNP markers

ASJC Scopus subject areas

Cite this

Genetic dissection of adventitious shoot regeneration in roses by employing genome-wide association studies. / Nguyen, Thi Hong Nhung; Schulz, Dietmar; Winkelmann, Traud et al.
In: Plant Cell Reports, Vol. 36, No. 9, 09.2017, p. 1493-1505.

Research output: Contribution to journalArticleResearchpeer review

Nguyen THN, Schulz D, Winkelmann T, Debener T. Genetic dissection of adventitious shoot regeneration in roses by employing genome-wide association studies. Plant Cell Reports. 2017 Sept;36(9):1493-1505. Epub 2017 Jun 24. doi: 10.1007/s00299-017-2170-8
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title = "Genetic dissection of adventitious shoot regeneration in roses by employing genome-wide association studies",
abstract = "Key Message: We analysed the capacity to regenerate adventitious shoots in 96 rose genotypes and found 88 SNP markers associated with QTLs, some of which are derived from candidate genes for shoot regeneration. Abstract: In an association panel of 96 rose genotypes previously analysed for petal colour, we conducted a genome-wide association study on the capacity of leaf petioles for direct shoot regeneration. Shoot regeneration rate and shoot ratio (number of shoots/total number of explants) were used as phenotypic descriptors for regeneration capacity. Two independent experiments were carried out with six replicates of ten explants each. We found significant variation between the genotypes ranging from 0.88 to 88.33% for the regeneration rate and from 0.008 to 1.2 for the shoot ratio, which exceeded the rates reported so far. Furthermore, we found 88 SNP markers associated with either the shoot regeneration rate or the shoot ratio. In this association analysis, we found 12 SNP markers from ESTs (expressed sequence tags) matching known candidate genes that are involved in shoot morphogenesis. The best markers explained more than 51% of the variance in the shoot regeneration rate and more than 0.65 of the variance in the shoot regeneration ratio between the homozygote marker classes. The genes underlying some of the best markers such as a GT-transcription factor or an LRR receptor-like protein kinase are novel candidate genes putatively involved in the observed phenotypic differences. The associated markers were mapped to the closely related genome of Fragaria vesca and revealed many distinct clusters, which also comprised the known candidate genes that functioned in the organogenesis of plant shoots. However, the validation of candidate genes and their functional relationship to shoot regeneration require further analysis in independent rose populations and functional analyses.",
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author = "Nguyen, {Thi Hong Nhung} and Dietmar Schulz and Traud Winkelmann and Thomas Debener",
note = "Funding information: This study was carried out in part with financial support from the Vietnamese Government and Department of Molecular Plant Breeding, Institute of Plant Genetics, Leibniz Universit{\"a}t, Hannover, Germany. We would like to thank Klaus Dreier and the gardeners from the Department of Molecular Plant Breeding for assistance and the Federal Plant Variety Office for providing greenhouse facilities in Hannover. We thank Dr. Frank Schaarschmidt from the Institute of Biostatistics, Leibniz Universit{\"a}t, Hannover, Germany, for help with the statistical analyses.",
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T1 - Genetic dissection of adventitious shoot regeneration in roses by employing genome-wide association studies

AU - Nguyen, Thi Hong Nhung

AU - Schulz, Dietmar

AU - Winkelmann, Traud

AU - Debener, Thomas

N1 - Funding information: This study was carried out in part with financial support from the Vietnamese Government and Department of Molecular Plant Breeding, Institute of Plant Genetics, Leibniz Universität, Hannover, Germany. We would like to thank Klaus Dreier and the gardeners from the Department of Molecular Plant Breeding for assistance and the Federal Plant Variety Office for providing greenhouse facilities in Hannover. We thank Dr. Frank Schaarschmidt from the Institute of Biostatistics, Leibniz Universität, Hannover, Germany, for help with the statistical analyses.

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N2 - Key Message: We analysed the capacity to regenerate adventitious shoots in 96 rose genotypes and found 88 SNP markers associated with QTLs, some of which are derived from candidate genes for shoot regeneration. Abstract: In an association panel of 96 rose genotypes previously analysed for petal colour, we conducted a genome-wide association study on the capacity of leaf petioles for direct shoot regeneration. Shoot regeneration rate and shoot ratio (number of shoots/total number of explants) were used as phenotypic descriptors for regeneration capacity. Two independent experiments were carried out with six replicates of ten explants each. We found significant variation between the genotypes ranging from 0.88 to 88.33% for the regeneration rate and from 0.008 to 1.2 for the shoot ratio, which exceeded the rates reported so far. Furthermore, we found 88 SNP markers associated with either the shoot regeneration rate or the shoot ratio. In this association analysis, we found 12 SNP markers from ESTs (expressed sequence tags) matching known candidate genes that are involved in shoot morphogenesis. The best markers explained more than 51% of the variance in the shoot regeneration rate and more than 0.65 of the variance in the shoot regeneration ratio between the homozygote marker classes. The genes underlying some of the best markers such as a GT-transcription factor or an LRR receptor-like protein kinase are novel candidate genes putatively involved in the observed phenotypic differences. The associated markers were mapped to the closely related genome of Fragaria vesca and revealed many distinct clusters, which also comprised the known candidate genes that functioned in the organogenesis of plant shoots. However, the validation of candidate genes and their functional relationship to shoot regeneration require further analysis in independent rose populations and functional analyses.

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