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- W4311315085 abstract "Abstract Established allopolyploids are known to be genomically stable and fertile. However, by contrast, most newly resynthesized allopolyploids are infertile and meiotically unstable. Identifying the genetic factors responsible for genome stability in newly formed allopolyploid is key to understanding how two genomes come together to form a species. One hypothesis is that established allopolyploids may have inherited specific alleles from their diploid progenitors which conferred meiotic stability. Resynthesized B. napus lines are often unstable and infertile, unlike B. napus cultivars. We tested this hypothesis by characterizing 41 resynthesized B. napus lines produced by crosses between eight B. rapa and eight B. oleracea lines for copy number variation resulting from non-homologous recombination events, and fertility. We resequenced eight B. rapa and five B. oleracea parent accessions, and analyzed 19 resynthesized lines for allelic variation in a list of meiosis gene homologs. SNP genotyping was performed using the Illumina Infinium Brassica 60K array for three individuals per line. Self-pollinated seed-set and genome stability (number of copy number variants) were significantly affected by the interaction between both B. rapa and B. oleracea parental genotypes. We identified thirteen putative meiosis gene candidates which were significantly associated with frequency of copy number variants and which contained putatively harmful mutations in meiosis gene haplotypes for further investigation. Our results support the hypothesis that allelic variants inherited from parental genotypes affect genome stability and fertility in resynthesized rapeseed." @default.
- W4311315085 created "2022-12-25" @default.
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- W4311315085 date "2022-12-13" @default.
- W4311315085 modified "2023-10-16" @default.
- W4311315085 title "Genetic factors inherited from both diploid parents interact to affect genome stability and fertility in resynthesized allotetraploid Brassica napus" @default.
- W4311315085 doi "https://doi.org/10.21203/rs.3.rs-552972/v2" @default.
- W4311315085 hasPublicationYear "2022" @default.
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