Genetic Analysis of the Non-Sporulating Phenotype of Brewer's Yeasts
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概要
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The ploidies and sporulation abilities of six brewer's yeasts were examined. One (YB11-1) out of the six was triploid and sporulating, another (IFO2031) was haploid, and the others (IFO1167,IFO2003,S341 and YB3-7) were diploid and non-sporulating.The five non-sporulating strains did not have the premeiotic DNA synthesis. Their non-sporulating phenotypes were genetically analyzed by examining the sporulation abilities of hybrids between brewer's yeasts and standard genetic strains of Saccharomyces cerevisiae. All non-sporulating brewer's yeasts complemented 32 sporulation-deficient mutation (spo T1-spo T23,spo1-spo5,spo7,spo8,spo10,and spo11). Hybrids between brewer's yeasts and haploid or diploid strains homozygous for the mating-type locus had poor or no sporulation. On the contrary, hybrids between brewer's yeasts and diploid strains heterozygous for the mating-type locus sporulated at a high frequency. These results indicated that the non-sporulating phenotype of brewer's yeasts was caused by a deficiency of the mating-type genes rather than by mutations of sporulation genes. The Southern hybridization probed with the MATa gene showed polymorphisms in mating-type genes of brewer's yeasts.
- 公益社団法人日本生物工学会の論文
- 1988-12-25
著者
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Tsuboi M
Dept. Biotechnol. Fac. Engineer. Fukuyama Univ.
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Tsuboi Michio
Department Of Biology Faculty Of Science Osaka City University
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Takahashi Toshiaki
Department Of Biotechnology Faculty Of Engineering Fukuyama University
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Takahashi Toshiaki
Department Of Anesthesiology Tokyo Medical University
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