Loci affecting flagellar assembly and function map to an unusual linkage group in Chlamydomonas reinhardtii.
The uni1 mutant of Chlamydomonas reinhardtii lacks one of the paired flagella seen in wild-type cells. The missing flagellum is cis to the eye spot and at this site the basal body is incomplete, lacking a transition zone. Together with nine other loci affecting flagellar assembly and two loci affecting flagellar function uni1 defines an approximately equal to 100-centimorgan linkage group with a circular map. Measurements of gene-centromere distances on the uni linkage group are consistent with the ordering of loci determined by recombination analysis and place the centromere near pf29, a motility-defective mutant. In well-synchronized meiotic cycles, recombination frequencies between loci on the uni linkage group but not loci on other linkage groups show striking temperature sensitivity during a 1- to 2-hr period 5 days before meiosis.
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D002502:Centrioles / Q000648:ultrastructure; D002696:Chlamydomonas / Q000235:genetics*; D002874:Chromosome Mapping; D005407:Flagella / Q000648:ultrastructure*; D008040:Genetic Linkage; D009024:Morphogenesis; D009154:Mutation; D010641:Phenotype; D011995:Recombination, Genetic; D013696:Temperature