ArticleAnnals of botany2023
Chromosome diversity in Dasypyrum villosum, an important genetic and trait resource for hexaploid wheat engineering.
Article in Annals of botany, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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7 citing papers in PubMed.
- Comparative Analysis of Triticeae Satellite Repeats Using Low-Coverage Sequencing, qPCR, and FISH.International journal of molecular sciences · 2026Article
- Cytogenetic Analysis of Altitude-Associated Chromosome Variations inEcology and evolution · 2026Article
- Comparative Analysis of Satellite DNA inPlants (Basel, Switzerland) · 2025Article
- Structural insights into AVR-Rmg8 recognition mechanisms by the wheat blast resistance gene Rmg8.Scientific reports · 2025Article
- Utilization of theMolecular breeding : new strategies in plant improvement · 2024Review
- Frequent variations and phylogenetic relationships within the genusFrontiers in plant science · 2024Article
- Polyploidy: its consequences and enabling role in plant diversification and evolution.Annals of botany · 2023Article
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13 authors.
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Abstract
BACKGROUND AND
aimsDasypyrum villosum (2n = 2x = 14) harbours potentially beneficial genes for hexaploid and tetraploid wheat improvement. Highly diversified chromosome variation exists among and within accessions due to its open-pollination nature. The wheat-D. villosum T6VS·6AL translocation was widely used in breeding mainly because gene Pm21 in the 6VS segment conferred high and lasting powdery mildew resistance. However, the widespread use of this translocation may narrow the genetic base of wheat. A better solution is to utilize diversified D. villosum accessions as the genetic source for wheat breeding. Analysis of cytological and genetic polymorphisms among D. villosum accessions also provides genetic evolution information on the species. Using cytogenetic and molecular tools we analysed genetic polymorphisms among D. villosum accessions and developed consensus karyotypes to assist the introgression of beneficial genes from D. villosum into wheat.
methodsA multiplex probe of repeats for FISH, GISH and molecular markers were used to detect chromosome polymorphisms among D. villosum accessions. Polymorphic signal block types, chromosome heterogeneity and heterozygosity, and chromosome polymorphic information content were used in genetic diversity analysis. KEY
resultsConsensus karyotypes of D. villosum were developed, and the homoeologous statuses of individual D. villosum chromosomes relative to wheat were determined. Tandem repeat probes of pSc119.2, (GAA)10 and the AFA family produced high-resolution signals and not only showed different signal patterns in D. villosum chromosomes but also revealed the varied distribution of tandem repeats among chromosomes and accessions. A total of 106 polymorphic chromosomes were identified from 13 D. villosum accessions and high levels of chromosomal heterozygosity and heterogeneity were observed. A subset of 56 polymorphic chromosomes was transferred into durum wheat through wide crosses, and seven polymorphic chromosomes are described in two newly developed durum-D. villosum amphidiploids.
conclusionsConsensus karyotypes of D. villosum and oligonucleotide FISH facilitated identification of polymorphic signal blocks and a high level of chromosomal heterozygosity and heterogeneity among D. villosum accessions, seen in newly developed amphiploids. The abundant genetic diversity of D. villosum and range of alleles, exploitable through interploid crosses, backcrosses and recombination (chromosome engineering), allow introduction of biotic and abiotic stress resistances into wheat, translating into increasing yield, end-use quality and crop sustainability.
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