ArticleBMC genomics2012
Genome-wide evaluation of genetic diversity and linkage disequilibrium in winter and spring triticale (x Triticosecale Wittmack).
Article in BMC genomics, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.
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15 citing papers in PubMed, 30 citations in OpenAlex.
- Effect of Chromosomal Localization of NGS-Based Markers on Their Applicability for Analyzing Genetic Variation and Population Structure of Hexaploid Triticale.International journal of molecular sciences · 2024Article
- Population genomics of Mediterranean oat (A. sativa) reveals high genetic diversity and three loci for heading date.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2021Article
- Genetic mapping of male sterility and pollen fertility QTLs in triticale with sterilizing Triticum timopheevii cytoplasm.Journal of applied genetics · 2021Article
- Assessing the genetic diversity and characterizing genomic regions conferring Tan Spot resistance in cultivated rye.PloS one · 2019Article
- Triticale Improvement for Forage and Cover Crop Uses in the Southern Great Plains of the United States.Frontiers in plant science · 2018Review
- Association mapping for floral traits in cultivated Paeonia rockii based on SSR markers.Molecular genetics and genomics : MGG · 2017Article
- A unified framework for hybrid breeding and the establishment of heterotic groups in wheat.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2016Article
- Adult plant development in triticale (× triticosecale wittmack) is controlled by dynamic genetic patterns of regulation.G3 (Bethesda, Md.) · 2014Article
- Genome-wide characterization of genetic diversity and population structure in Secale.BMC plant biology · 2014Article
- Efficiency of augmented p-rep designs in multi-environmental trials.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2014Article
- Article
- Accession-specific modifiers act with ZWILLE/ARGONAUTE10 to maintain shoot meristem stem cells during embryogenesis in Arabidopsis.BMC genomics · 2013Article
- Population structure, genetic diversity and linkage disequilibrium in elite winter wheat assessed with SNP and SSR markers.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2013Article
- Genetic diversity, population structure and linkage disequilibrium in elite Chinese winter wheat investigated with SSR markers.PloS one · 2012Article
- Assessment of Genetic Diversity inPlant molecular biology reporterArticle
Corrections and comments
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Authors and funding
7 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundRecent advances in genotyping with high-density markers nowadays enable genome-wide genomic analyses in crops. A detailed characterisation of the population structure and linkage disequilibrium (LD) is essential for the application of genomic approaches and consequently for knowledge-based breeding. In this study we used the triticale-specific DArT array to analyze population structure, genetic diversity, and LD in a worldwide set of 161 winter and spring triticale lines.
resultsThe principal coordinate analysis revealed that the first principal coordinate divides the triticale population into two clusters according to their growth habit. The density distributions of the first ten principal coordinates revealed that several show a distribution indicative of population structure. In addition, we observed relatedness within growth habits which was higher among the spring types than among the winter types. The genome-wide analysis of polymorphic information content (PIC) showed that the PIC is variable among and along chromosomes and that especially the R genome of spring types possesses a reduced genetic diversity. We also found that several chromosomes showed regions of high genetic distance between the two growth habits, indicative of divergent selection. Regarding linkage disequilibrium, the A and B genomes showed a similar LD of 0.24 for closely linked markers and a decay within approximately 12 cM. LD in the R genome was lower with 0.19 and decayed within a shorter map distance of approximately 5 cM. The extent of LD was generally higher for the spring types compared to the winter types. In addition, we observed strong variability of LD along the chromosomes.
conclusionsOur results confirm winter and spring growth habit are the major contributors to population structure in triticale, and a family structure exists in both growth types. The specific patterns of genetic diversity observed within these types, such as the low diversity on some rye chromosomes of spring habits, provide a basis for targeted broadening of the available breeding germplasm. In addition, the genome-wide analysis of the extent and the pattern of LD will assist scientists and breeders alike in the implementation and the interpretation of association mapping in triticale.
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