Reticulate evolution, coupled with reproductive features limiting further interspecific recombinations, results in admixed mosaics of large genomic fragments from the ancestral taxa. Whole-genome sequencing (WGS) data are powerful tools to decipher such complex genomes but still too costly to be used for large populations. The aim of this work was to develop an approach to infer phylogenomic structures in diploid, triploid and tetraploid individuals from sequencing data in reduced genome complexity libraries. The approach was applied to the cultivated Citrus gene pool resulting from reticulate evolution involving four ancestral taxa, C. maxima, C. medica, C. micrantha and C. reticulata.
Among 43,598 mined SNPs, Ahmed et al. identified a set of 15,946 DSNPs covering the whole genome with a distribution similar to that of gene sequences. The set efficiently inferred the phylogenomic karyotype of the 53 analysed accessions, providing patterns for common accessions very close to that previously established using WGS data. The complex phylogenomic karyotypes of 21 cultivated citrus, including bergamot, triploid and tetraploid limes, were revealed for the first time.
The pipeline, available online, efficiently inferred the phylogenomic structures of diploid, triploid and tetraploid citrus. It will be useful for any species whose reproductive behaviour resulted in an interspecific mosaic of large genomic fragments. It can also be used for the first generations of interspecific breeding schemes.
Jatropha curcas could be an oil crop with major biofuel potential, but the breeding germplasm has little variation. Botanists have found that there is genetic potential in previously overlooked non-toxic jatropha, but it needs conservation.
Botany One is a weblog produced by The Annals of Botany Company. The aim of the weblog is to alert plant scientists around the world to interesting and topical news about plants.
The Annals of Botany Company is a Limited Company registered in England No. 78001 at:
University of Exeter, Innovation Centre, Rennes Drive, Exeter, EX4 4RN, UK, and is also a Registered Charity, No. 237771
If you would like us to link to your page, to help you sell something, or would like to sell us SEO services, we are staggeringly not interested.
If you have a plant science story, then we would be delighted to talk to you. The editor is Anne Osterrieder and you can contact her at email@example.com
The producer is Alun Salt, and you can contact him at firstname.lastname@example.org