| Identification and Preliminary Analysis of the Genetic Diversity of Cenococcum geophilum Fr. |
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| 作者姓名： | CHEN Li-hong YAN Wei XU Yan |
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| 作者单位： | [1]College of Forestry, Inner Mongolia Agricultural University, Huhhot 010019, P.R.China [2]College of Agronomy, lnner Mongolia Agricultural University, Huhhot 010019, P.R.China |
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| 摘 要： | To identify Cenococcum geophilum Fr., estimate their genetic diversity and study the effects on their genetic variation, 27 Chinese C. geophilum isolates from 6 host plant species and 5 French C. geophilum isolates were analyzed using morphological and molecular methods. The universal primers ITS1/ITS4 were used in PCR-RFLP to amplify the rDNA internal transcribed spacer （ITS） of tested C. geophilum isolates. The amplified products were digested with EcoR Ⅰ, Hinf Ⅰ, and Mbo Ⅰ, and the digested fragments of PCR products showed that there were obvious differences. A random primer （5′-CGCACCGCAC-3′） was employed in RAPD to amplify the genomic DNA of C. geophilum, and 19 detectable and reliable DNA bands of 300-2000 bp size were observed. According to the number, position, and strength of the DNA bands in agarose gel, the genetic distance and the genetic similarity among C. geophilum isolates were calculated using the PopGen Ver. 1.31 dendrogram analysis software. A phylogenetic tree was constructed based on the genetic distance by the Neighbor-Joining/UPGMA in PHYLIP. The results suggest the high level of genetic diversity among C. geophilum isolates from the same or different hosts. The effects of geographical factors or host plant species on C. geophilum genetic variation are not obvious.
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| 关 键 词： | 真菌 遗传多样性 遗传变异 生物形态学 |
Identification and Preliminary Analysis of the Genetic Diversity of Cenococcum geophilum Fr. |
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| CHEN Li-hong YAN Wei XU Yan.Identification and Preliminary Analysis of the Genetic Diversity of Cenococcum geophilum Fr.[J].Agricultural Sciences in China,2007,6(8):956-963. |
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| Authors: | CHEN Li-hong YAN Wei XU Yan |
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| Institution: | 1. College of Forestry, Inner Mongolia Agricultural University, Huhhot 010019, P.R. China;College of Agronomy, Inner Mongolia Agricultural University, Huhhot 010019, P.R. China
2. College of Forestry, Inner Mongolia Agricultural University, Huhhot 010019, P.R. China |
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| Abstract: | To identify Cenococcum geophilum Fr., estimate their genetic diversity and study the effects on their genetic variation,27 Chinese C. geophilum isolates from 6 host plant species and 5 French C. geophilum isolates were analyzed using morphological and molecular methods. The universal primers ITS1/ITS4 were used in PCR-RFLP to amplify the rDNA internal transcribed spacer (ITS) of tested C. geophilum isolates. The amplified products were digested with EcoR Ⅰ,Hinf Ⅰ, and Mbo Ⅰ, and the digested fragments of PCR products showed that there were obvious differences. A random primer (5'-CGCACCGCAC-3') was employed in RAPD to amplify the genomic DNA of C. geophilum, and 19 detectable and reliable DNA bands of 300-2 000 bp size were observed. According to the number, position, and strength of the DNA bands in agarose gel, the genetic distance and the genetic similarity among C. geophilum isolates were calculated using the PopGen Ver. 1.31 dendrogram analysis software. A phylogenetic tree was constructed based on the genetic distance by the Neighbor-Joining/UPGMA in PHYLIP. The results suggest the high level of genetic diversity among C. geophilum isolates from the same or different hosts. The effects of geographical factors or host plant species on C. geophilum genetic variation are not obvious. |
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| Keywords: | ectomycorrhizal fungi Cenococcum geophilum Fr PCR-RFLP RAPD genetic diversity |
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