Structural Analysis of the A Mating Type Locus and Development of the Mating Type Marker of Agaricus bisporus var. bisporus

被引:1
作者
Choi, Yeon-Jae [1 ]
Jung, Sujin [1 ]
Eom, Hyerang [1 ]
Hoang, Thimen [1 ]
Han, Hui-Gang [1 ]
Kim, Sinil [1 ]
Ro, Hyeon-Su [1 ]
机构
[1] Gyeongsang Natl Univ, Res Inst Life Sci, Dept Biomed Bigdata BK21, Jinju 52828, South Korea
基金
新加坡国家研究基金会;
关键词
Agaricus bisporus; A mating type; transposon; nuclear marker; LENTINULA-EDODES; TRANSFORMATION; BASIDIOMYCETE; EVOLUTION; LINKAGE; DNA;
D O I
10.3390/jof9030284
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
Karyotyping in Agaricus bisporus is crucial for both the isolation of homokaryotic strains and the confirmation of dikaryon establishment. For the verification of the karyotype, the A mating type loci of two homokaryotic strains, H39 and H97, were analyzed through comparative sequence analysis. The two loci showed major differences in two sequence regions designated as Region 1 and Region 2. H97 had a putative DNA transposon in Region 1 that had target site duplications (TSDs), terminal inverted repeats (TIRs), and a loop sequence, in contrast to H39, which only had the insertional target sequence. Homologous sequences of the transposon were discovered in the two different chromosomes of H97 and in one of H39, all of which have different TSDs but share high sequence homology in TIR. Region 2 shared three consensus sequences between H97 and H39. However, it was only from H97 that a large insertional sequence of unknown origin was discovered between the first and second consensus sequences. The difference in length in Region 1, employed for the verification of the A mating type, resulted in the successful verification of mating types in the heterokaryotic and homokaryotic strains. This length difference enables the discrimination between homo- and heterokaryotic spores by PCR. The present study suggests that the A mating type locus in A. bisporus H97 has evolved through transposon insertion, allowing the discrimination of the mating type, and thus the nuclear type, between A. bisporus H97 and H39.
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页数:10
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