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Genetic Analysis and Transfer of Favorable Exotic QTL Alleles for Grain Yield Across D Genome Using Two Advanced Backcross Wheat Populations.
Front Plant Sci. 2019; 10:711.FP

Abstract

Hexaploid wheat evolved through a spontaneous hybridization of tetraploid wheat (Triticum turgidum, AABB) with diploid wild grass (Aegilops tauschii, DD). Recent genome sequencing found alarmingly low genetic diversity and abundance of repeated sequences across D genome as compared to AB genomes. This characteristic feature of D genome often results in a low recombination rate and abrupt changes in chromosome, which are the major hurdles to utilize the genetic potential of D genome in wheat breeding. In the present study, we evaluated two advanced backcross populations designated as B22 (250 BC2F3:6 lines) and Z86 (150 BC2F3:6 lines) to test their yield potential and to enrich the D genome diversity simultaneously. The populations B22 and Z86 were derived by crossing winter wheat cultivars Batis and Zentos with synthetic hexaploid wheat accessions Syn022L and Syn086L, respectively. These populations were genotyped using SNP markers and phenotyped for yield traits in ten environments in Germany. Marker analysis identified lower recombination rate across D genome as compared to A and B genomes in both populations. Further, we compared the genotype data with the trait grain yield to identify favorable exotic introgressions from synthetic wheat accessions. QTL analysis identified seven and 13 favorable exotic QTL alleles associated with enhancement or at least stable grain yield in populations B22 and Z86, respectively. These favorable introgressions were located on all chromosomes from 1D to 7D. The strongest exotic QTL allele on chromosome 1D at SNP marker RAC875_c51493_471 resulted in a relative increase of 8.6% in grain yield as compared to cultivated allele. The identified exotic introgressions will help to refine useful exotic chromosome segments for their incorporation for improving yield and increasing D genome diversity among cultivated varieties.

Authors+Show Affiliations

Institute of Crop Science and Resource Conservation, Plant Breeding, University of Bonn, Bonn, Germany.Institute of Crop Science and Resource Conservation, Plant Breeding, University of Bonn, Bonn, Germany.Institute of Crop Science and Resource Conservation, Plant Breeding, University of Bonn, Bonn, Germany.Institute of Agricultural and Nutritional Sciences, Plant Breeding, Martin Luther University of Halle-Wittenberg, Halle, Germany.Institute of Crop Science and Resource Conservation, Plant Breeding, University of Bonn, Bonn, Germany.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31214227

Citation

Naz, Ali Ahmad, et al. "Genetic Analysis and Transfer of Favorable Exotic QTL Alleles for Grain Yield Across D Genome Using Two Advanced Backcross Wheat Populations." Frontiers in Plant Science, vol. 10, 2019, p. 711.
Naz AA, Dadshani S, Ballvora A, et al. Genetic Analysis and Transfer of Favorable Exotic QTL Alleles for Grain Yield Across D Genome Using Two Advanced Backcross Wheat Populations. Front Plant Sci. 2019;10:711.
Naz, A. A., Dadshani, S., Ballvora, A., Pillen, K., & Léon, J. (2019). Genetic Analysis and Transfer of Favorable Exotic QTL Alleles for Grain Yield Across D Genome Using Two Advanced Backcross Wheat Populations. Frontiers in Plant Science, 10, 711. https://doi.org/10.3389/fpls.2019.00711
Naz AA, et al. Genetic Analysis and Transfer of Favorable Exotic QTL Alleles for Grain Yield Across D Genome Using Two Advanced Backcross Wheat Populations. Front Plant Sci. 2019;10:711. PubMed PMID: 31214227.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Genetic Analysis and Transfer of Favorable Exotic QTL Alleles for Grain Yield Across D Genome Using Two Advanced Backcross Wheat Populations. AU - Naz,Ali Ahmad, AU - Dadshani,Said, AU - Ballvora,Agim, AU - Pillen,Klaus, AU - Léon,Jens, Y1 - 2019/06/04/ PY - 2019/01/31/received PY - 2019/05/13/accepted PY - 2019/6/20/entrez PY - 2019/6/20/pubmed PY - 2019/6/20/medline KW - Aegilops tauschii KW - D genome KW - exotic allele KW - grain yield KW - synthetic wheat SP - 711 EP - 711 JF - Frontiers in plant science JO - Front Plant Sci VL - 10 N2 - Hexaploid wheat evolved through a spontaneous hybridization of tetraploid wheat (Triticum turgidum, AABB) with diploid wild grass (Aegilops tauschii, DD). Recent genome sequencing found alarmingly low genetic diversity and abundance of repeated sequences across D genome as compared to AB genomes. This characteristic feature of D genome often results in a low recombination rate and abrupt changes in chromosome, which are the major hurdles to utilize the genetic potential of D genome in wheat breeding. In the present study, we evaluated two advanced backcross populations designated as B22 (250 BC2F3:6 lines) and Z86 (150 BC2F3:6 lines) to test their yield potential and to enrich the D genome diversity simultaneously. The populations B22 and Z86 were derived by crossing winter wheat cultivars Batis and Zentos with synthetic hexaploid wheat accessions Syn022L and Syn086L, respectively. These populations were genotyped using SNP markers and phenotyped for yield traits in ten environments in Germany. Marker analysis identified lower recombination rate across D genome as compared to A and B genomes in both populations. Further, we compared the genotype data with the trait grain yield to identify favorable exotic introgressions from synthetic wheat accessions. QTL analysis identified seven and 13 favorable exotic QTL alleles associated with enhancement or at least stable grain yield in populations B22 and Z86, respectively. These favorable introgressions were located on all chromosomes from 1D to 7D. The strongest exotic QTL allele on chromosome 1D at SNP marker RAC875_c51493_471 resulted in a relative increase of 8.6% in grain yield as compared to cultivated allele. The identified exotic introgressions will help to refine useful exotic chromosome segments for their incorporation for improving yield and increasing D genome diversity among cultivated varieties. SN - 1664-462X UR - https://www.unboundmedicine.com/medline/citation/31214227/Genetic_Analysis_and_Transfer_of_Favorable_Exotic_QTL_Alleles_for_Grain_Yield_Across_D_Genome_Using_Two_Advanced_Backcross_Wheat_Populations_ L2 - https://doi.org/10.3389/fpls.2019.00711 DB - PRIME DP - Unbound Medicine ER -
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