Recombination between homoeologous chromosomes induced in durum wheat by the Aegilops speltoides Su1-Ph1 suppressor

Li, Hao; Wang, Le; Luo, Ming‐Cheng; Nie, Fang; Zhou, Yun; McGuire, Patrick E.; Distelfeld, Assaf; Dai, Xiongtao; Song, Chun‐Peng; Dvořák, Jan

doi:10.1007/s00122-019-03423-z

Cited by 9 publications

(5 citation statements)

References 46 publications

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“…speltoides hybrids ( Dvorak et al, 2006 ). Genes that affect chromosome pairing during meiosis were also found in the 5U chromosome of Aegilops umbrella ( Riley et al, 1973 ), 4M g chromosome of A. geniculata ( Kynast et al, 2000 ), and 3S chromosome of A. speltoides Tausch ( Li et al, 2019 ).…”

Section: Discussionmentioning

confidence: 99%

Identification of 5P Chromosomes in Wheat-Agropyron cristatum Addition Line and Analysis of Its Effect on Homologous Pairing of Wheat Chromosomes

Pan

Zhang

et al. 2022

Front. Plant Sci.

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As an important wheat wild relative, the P genome of Agropyron cristatum (L.) Gaertn. (2n = 4x = 28) is very valuable for wheat improvement. A complete set of wheat-A. cristatum disomic addition lines is the basis for studying the genetic behavior of alien homoeologous chromosomes and exploring and utilizing the excellent genes. In this study, a wheat-A. cristatum derivative II-11-1 was proven to contain a pair of 5P chromosomes and a pair of 2P chromosomes with 42 wheat chromosomes by analyzing the fluorescence in situ hybridization (FISH) and expressed sequence tag (EST) markers. Additionally, cytological identification and field investigation showed that the 5P chromosome can weaken the homologous pairing of wheat chromosomes and promote the pairing between homoeologous chromosomes. This provides new materials for studying the mechanism of the alien gene affecting the homologous chromosome pairing and promoting the homoeologous pairing of wheat. In addition, chromosomal structural variants have been identified in the progeny of II-11-1. Therefore, the novel 5P addition line might be used as an important genetic material to widen the genetic resources of wheat.

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Section: Discussionmentioning

confidence: 99%

Identification of 5P Chromosomes in Wheat-Agropyron cristatum Addition Line and Analysis of Its Effect on Homologous Pairing of Wheat Chromosomes

Pan

Zhang

et al. 2022

Front. Plant Sci.

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“…Sequential non‐denaturing fluorescence in situ hybridization (ND‐FISH) was performed on the fresh roots from three sources before placing at speed growth condition. Mitotic chromosomes of the samples were karyotyped according to the previous method (Li et al., 2019; Zhou et al., 2021). Oligo‐(GAA) 10 and oligo‐pTa71 probes were modified with CY‐5 at the 5′ end, while oligo‐pSc119.2 and oligo‐CRW2 were modified with 6‐carboxyfluorescein and oligo‐pTa535 modified with Tamara at the 5′ end.…”

Section: Methodsmentioning

confidence: 99%

“…Immature spikes when grew to the second leaf were collected from plants grown under greenhouse conditions and meiotic spreads were prepared as described previously (Li et al., 2019). Two or three immature spikes were taken and meiotic chromosome pairing was averaged in 40–60 meiocytes per plant.…”

Section: Methodsmentioning

confidence: 99%

Reciprocal translocations hidden by phenotype and genotype within the same wheat cultivar

Fan

et al. 2023

Crop Science

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Chromosomal rearrangements play essential roles in crop evolution, and different types of rearrangements have been identified in various cultivars belonging to Triticeae. However, it has not been reported whether chromosome rearrangements also occur within the same cultivar. We screened 33 plants of a Chinese modern cultivar Aikang58 (AK58) using non‐denaturing fluorescence in situ hybridization technique and found two with reciprocal translocation 3BL‐6BL and 3BS‐6BS present, thereafter designated as AK58T. The breakpoint positions of AK58T were different from previous 3B‐6B translocation, indicating newly reported translocations in common wheat. The genetic similarity between AK58 and AK58T was greater than 99.8% by wheat 55K chip array analysis. Our results showed no significant phenotype difference in five developmental periods or seven seed traits between the two lines under speed breeding conditions. However, the F1 hybrids between AK58 and AK58T severely suffered from low seedset due to the documented occurrence of multivalent formation during meiosis. Screening of 41 F2 progenies identified eight types of chromosomal variations that affected agronomic traits and decreased the fertility. Therefore, we reported that chromosomal rearrangements within the same cultivar could be hidden by high phenotype and genotype similarity, and concluded that these types of hidden variations may lead to severe fertility penalty once outcross occurred.

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“…The intrinsic karyotype stability plays an important role in the evolution of flowering plants, especially for polyploidy formation (Zhang et al, 2013). Furthermore, in allopolyploids, recombination between homoeologous chromosomes can affect epigenetic and gene expression variation and generates novel transcripts and proteins, which may contribute to genome evolution and adaptation (Li et al, 2019;Zhang et al, 2020b).…”

Section: Adaptive Evolution Based On Comparative Genomicsmentioning

confidence: 99%

Molecular mechanisms of adaptive evolution in wild animals and plants

Wang

et al. 2023

Sci. China Life Sci.

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Wild animals and plants have developed a variety of adaptive traits driven by adaptive evolution, an important strategy for species survival and persistence. Uncovering the molecular mechanisms of adaptive evolution is the key to understanding species diversification, phenotypic convergence, and inter-species interaction. As the genome sequences of more and more non-model organisms are becoming available, the focus of studies on molecular mechanisms of adaptive evolution has shifted from the candidate gene method to genetic mapping based on genome-wide scanning. In this study, we reviewed the latest research advances in wild animals and plants, focusing on adaptive traits, convergent evolution, and coevolution. Firstly, we focused on the adaptive evolution of morphological, behavioral, and physiological traits. Secondly, we reviewed the phenotypic convergences of life history traits and responding to environmental pressures, and the underlying molecular convergence mechanisms. Thirdly, we summarized the advances of coevolution, including the four main types: mutualism, parasitism, predation and competition. Overall, these latest advances greatly increase our understanding of the underlying molecular mechanisms for diverse adaptive traits and species interaction, demonstrating that the development of evolutionary biology has been greatly accelerated by multi-omics technologies. Finally, we highlighted the emerging trends and future prospects around the above three aspects of adaptive evolution.

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Recombination between homoeologous chromosomes induced in durum wheat by the Aegilops speltoides Su1-Ph1 suppressor

Cited by 9 publications

References 46 publications

Identification of 5P Chromosomes in Wheat-Agropyron cristatum Addition Line and Analysis of Its Effect on Homologous Pairing of Wheat Chromosomes

Identification of 5P Chromosomes in Wheat-Agropyron cristatum Addition Line and Analysis of Its Effect on Homologous Pairing of Wheat Chromosomes

Reciprocal translocations hidden by phenotype and genotype within the same wheat cultivar

Molecular mechanisms of adaptive evolution in wild animals and plants

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