Effect of Hybridization on Somatic Mutations and Genomic Rearrangements in Plants

Bashir, Tufail; Mishra, Ratnesh Chandra; Hasan, Md. Mohidul; Mohanta, Tapan Kumar; Bae, Hanhong

doi:10.3390/ijms19123758

Cited by 21 publications

(13 citation statements)

References 89 publications

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“…However, in the origin of V. palustris, in addition to V. epipsila, a second unknown species having a GS that is not exactly the same as that of V. epipsila could have been involved. Although hybridization has been shown to have the potential to alter the GS (homoploid hybrid speciation, allopolyploidy), hybridization itself did not increase the GS, as demonstrated in studies on Helianthus hybrids [104,105]. The GS of the V. epipsila × V. palustris hybrids studied in the present research confirms this statement, because their 2C values were the sum of the haploid parental genomes.…”

Section: Lack Of Intraspecific Variation In Genome Sizesupporting

confidence: 80%

Interspecific Hybridization and Introgression Influence Biodiversity—Based on Genetic Diversity of Central European Viola epipsila-V. palustris Complex

et al. 2020

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The Viola epipsila-V. palustris complex is a highly taxonomically complicated group of species in its entire circumboreal range of distribution. Habitat loss, forest flooding, and hybridization could lead to the extinction of V. epipsila. A hybrid index and principal component analysis (PCA) were used to select qualitative and quantitative morphological features to distinguish parent species and hybrids, inter simple sequence repeat (ISSR) markers to determine the genetic diversity of the populations, flow cytometry to estimate the genome size (GS), and non-coding chloroplast DNA (cpDNA) regions to indicate the directions of crosses. All taxa are very morphologically variable, and their features can change within a season. The most stable feature is the distance of the bracts on the pedicel from the rhizome. The genetic diversity of all taxa populations is low and highly influenced by selfing and vegetative propagation. The population structure is differentiated: populations of V. epipsila or V. palustris, mixed populations with both parent species, F1 hybrids and populations with introgressive forms occur in different regions. The interspecific GS variation corresponds to the ploidy level (4x = 2.52 pg, 8x = 4.26 pg, 6x = 3.42 pg). Viola epipsila is the mother plant of the hybrids. Research has shown the risk of V. epipsila extinction in Central Europe and the importance of local populations in studying the role of hybridization in reducing/maintaining/increasing biodiversity.

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Section: Lack Of Intraspecific Variation In Genome Sizesupporting

confidence: 80%

Interspecific Hybridization and Introgression Influence Biodiversity—Based on Genetic Diversity of Central European Viola epipsila-V. palustris Complex

et al. 2020

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“…Chromosomal rearrangements were known to be triggered due to ‘genomic shock’ during hybridization [ 25 ]. The spontaneous mutations, novel chromosomal changes, and retrotransposon activations had been reported in several plant species during hybridization [ 26 , 27 ]. As the weedy rice accession is genetically distant to japonica cultivars [ 28 ], this mutation most likely spontaneously originated from this distant cross.…”

Section: Discussionmentioning

confidence: 99%

A Novel Mutation of the NARROW LEAF 1 Gene Adversely Affects Plant Architecture in Rice (Oryza sativa L.)

Subudhi

Garcia

Coronejo

et al. 2020

IJMS

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Plant architecture is critical for enhancing the adaptability and productivity of crop plants. Mutants with an altered plant architecture allow researchers to elucidate the genetic network and the underlying mechanisms. In this study, we characterized a novel nal1 rice mutant with short height, small panicle, and narrow and thick deep green leaves that was identified from a cross between a rice cultivar and a weedy rice accession. Bulked segregant analysis coupled with genome re-sequencing and cosegregation analysis revealed that the overall mutant phenotype was caused by a 1395-bp deletion spanning over the last two exons including the transcriptional end site of the nal1 gene. This deletion resulted in chimeric transcripts involving nal1 and the adjacent gene, which were validated by a reference-guided assembly of transcripts followed by PCR amplification. A comparative transcriptome analysis of the mutant and the wild-type rice revealed 263 differentially expressed genes involved in cell division, cell expansion, photosynthesis, reproduction, and gibberellin (GA) and brassinosteroids (BR) signaling pathways, suggesting the important regulatory role of nal1. Our study indicated that nal1 controls plant architecture through the regulation of genes involved in the photosynthetic apparatus, cell cycle, and GA and BR signaling pathways.

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“…One study noted that “…hybrid offspring receive a genomic shock due to mixing of distant parental genomes, which triggers a myriad of genomic rearrangements, for example, transpositions, genome size changes, chromosomal rearrangements, and other effects on the chromatin (i.e., DNA structures). Recently, it has been reported that, besides genomic rearrangements, hybridization can also alter the somatic mutation rates in plants.” (Bashir, Mishra, Hasan, Mohanta, & Bae, 2018). This does not mean that these more intrusive methods should be avoided—in some cases, traditional breeding, mutagenesis, or hybridization may be quicker, easier, and more effective tools for genetic modification in plants, despite resulting genomic changes.…”

Section: Figurementioning

confidence: 99%

“…Recently, it has been reported that, besides genomic rearrangements, hybridization can also alter the somatic mutation rates in plants." (Bashir, Mishra, Hasan, Mohanta, & Bae, 2018). This does not mean that these more intrusive methods should be avoided-in some cases, traditional breeding, mutagenesis, or hybridization may be quicker, easier, and more effective tools for genetic modification in plants, despite resulting genomic changes.…”

mentioning

confidence: 99%

Intentional introgression of a blight tolerance transgene to rescue the remnant population of American chestnut

Newhouse

Powell

2020

Conservat Sci and Prac

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In contrast to many current applications of biotechnology, the intended consequence of the American Chestnut Research & Restoration Project is to produce trees that are well‐adapted to thrive not just in confined fields or orchards, but throughout their natural range. Our primary focus is on disease tolerance, but we believe it will also be critically important that optimal restoration trees should have robust genetic diversity and resilience, which can be supplied by a full complement of their wild‐type genes. Chestnut restoration offers a unique case study because many restoration or intervention options have been attempted: doing nothing, planting non‐native chestnut species, planting hybrids, mutagenesis (exposing seeds to high levels of radiation to induce random mutations), backcross breeding, and now genetic engineering. Any of these techniques may be advantageous independently or in combinations, depending on the specific goals of land managers or restoration practitioners, but genetic engineering offers a unique opportunity to enhance blight tolerance while minimizing other changes to the genome.

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Effect of Hybridization on Somatic Mutations and Genomic Rearrangements in Plants

Cited by 21 publications

References 89 publications

Interspecific Hybridization and Introgression Influence Biodiversity—Based on Genetic Diversity of Central European Viola epipsila-V. palustris Complex

Interspecific Hybridization and Introgression Influence Biodiversity—Based on Genetic Diversity of Central European Viola epipsila-V. palustris Complex

A Novel Mutation of the NARROW LEAF 1 Gene Adversely Affects Plant Architecture in Rice (Oryza sativa L.)

Intentional introgression of a blight tolerance transgene to rescue the remnant population of American chestnut

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