Tryptophan analog resistance mutations in Chlamydomonas reinhardtii
Article Abstract:
Chlamydomonas reinhardtii mutants were selected by their resistance to 5'-methyl anthranilic acid (5-MAA), to isolate possible genes involved in tryptophan biosynthesis. Forty one mutant strains were generated, falling into two classes. Class I mutants grew slower than wild type in the absence of 5-MAA, while class II mutants had growth rates similar to wild type. Futher characterization of these mutants showed that the class I mutants define seven loci with probable roles in tryptophan synthesis. One of these loci, termed MAA6, could code for a biosynthetic enzyme. Results also indicated that some loci could be involved in epistatic relationships.
Publication Name: Genetics
Subject: Biological sciences
ISSN: 0016-6731
Year: 1992
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Genetic interactions among Chlamydomonas reinhardtii mutations that confer resistance to anti-microtubule herbicides
Article Abstract:
Resistance to anti-microtubule herbicides of Chlamydomonas reinhardtii mutations arising from genetic interactions in the aminoprophos-methyl (APM) 1 and APM2 loci were further studied. Additional allele-specific genetic interactions were discovered in both loci aside from the allele-specific lethality and unlinked noncomplementation interactions. Flagellar regeneration was found to be inhibited by these mutations. The genetic interactions among the gene mutations indicated modified stability of the complex wherein mutant products were found active.
Publication Name: Genetics
Subject: Biological sciences
ISSN: 0016-6731
Year: 1992
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Linkage group XIX of Chlamydomonas reinhardtii has a linear map
Article Abstract:
The circular meiotic recombination map reportedly exhibited by the linkage group XIX of Chlamydomonas reinhardtii was analysed. Circular map predicts that the linkage will show strong chiasma and chromatid interference. However, multipoint crosses analysis showed positive chisma but no chromatid interference which are characteristics of a linear linkage group. The results indicate that the Chalamydomonas reinhardtii linkage group XIX has a linear genetic map similar to those of other Chlamydomonas linkage groups.
Publication Name: Genetics
Subject: Biological sciences
ISSN: 0016-6731
Year: 1993
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