Genetic crosses in the apicomplexan parasite Cryptosporidium parvum define recombination parameters.
Genetic crosses in the apicomplexan parasite Cryptosporidium parvum define recombination parameters.
复制标题
顶端复门寄生虫小隐孢子虫中的遗传杂交定义了重组参数。
DOI：
10.1111/j.1365-2958.2007.05594.x
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发表时间：
2007
影响因子：
3.6
通讯作者：
Widmer,Giovanni
中科院分区：
文献类型：
--
作者：
Tanriverdi,Sultan;Blain,JCraig;Deng,Bingbing;Ferdig,MichaelT;Widmer,Giovanni
Recombinant progeny lines ofCryptosporidium parvumwere generated by coinfecting immunosuppressed mice with two genetically distinct isolates ofC. parvum. Progeny lines were obtained from a cross of parental lines MD × TU114 through targeted propagation in mice of progeny oocysts originating from populations lacking one parental allele at one or more loci. For each infection lineage this process was repeated until only a single allele remained for each marker, indicating that the progeny line was clonal. To study genetic recombination, 16 progeny clones were genotyped at 40 loci located on each of the eight chromosomes. The inheritance of parental alleles was significantly skewed towards the more virulent parent isolate MD. A contiguous 476 kb segment of chromosome V displayed MD allele in all progeny recovered, while MD and TU114 alleles were detected at other loci throughout the genome. The absence of alleles from one parental isolate in this chromosomal region may indicate phenotypic selection for the MD allele during the generation of these lines. A range for the meiotic crossover frequency was determined on the basis of 40 markers and the number of meioses estimated to have taken place during the crossing experiment.C. parvumexhibits a high rate of recombination commensurate with other Apicomplexa.
