Musa beccarii N.W.Simmonds var. beccarii and Musa beccarii N.W.Simmonds var. hottana H?kkinen were described earlier in Acta Phytotaxonomica et Geobotanica based on their morphological characteristics. In order to dis...Musa beccarii N.W.Simmonds var. beccarii and Musa beccarii N.W.Simmonds var. hottana H?kkinen were described earlier in Acta Phytotaxonomica et Geobotanica based on their morphological characteristics. In order to distinguish the genomes between the two M. beccarii varieties and M. coccinea Andrews, we have now studied them with the Inter- Retrotransposon Amplified Polymorphism (IRAP) marker analyses. The high levels of IRAP polymorphism detected in this study showed that M. beccarii var. beccarii and M. beccarii var. hottana are two distinct varieties. Additional IRAP bands found in M. beccarii var. beccarii indicated that M. beccarii var. hottana might be evolutionarily more ancient than M. beccarii var. beccarii because LTR retrotransposons are not transpositionally removed.展开更多
To investigate the genetic diversity of Tricholoma matsutake,we studied ITS and IGS1 sequences and PCR polymorphism of a retrotransposon in 56 fruit bodies collected from 13 counties of 9 regions in Yunnan Province. W...To investigate the genetic diversity of Tricholoma matsutake,we studied ITS and IGS1 sequences and PCR polymorphism of a retrotransposon in 56 fruit bodies collected from 13 counties of 9 regions in Yunnan Province. We found one and three haplotypes based on ITS and IGS1 sequences,respectively. Moreover,there was no significant difference in PCR polymorphism of the retrotransposon among different populations. Compared with Jilin Province(China) and Japanese populations,although Yun-nan was highly homogenous to Japanese populations,low genetic diversity of T. matsutake in Yunnan did not support the view that this species originated from Yunnan.展开更多
文摘Musa beccarii N.W.Simmonds var. beccarii and Musa beccarii N.W.Simmonds var. hottana H?kkinen were described earlier in Acta Phytotaxonomica et Geobotanica based on their morphological characteristics. In order to distinguish the genomes between the two M. beccarii varieties and M. coccinea Andrews, we have now studied them with the Inter- Retrotransposon Amplified Polymorphism (IRAP) marker analyses. The high levels of IRAP polymorphism detected in this study showed that M. beccarii var. beccarii and M. beccarii var. hottana are two distinct varieties. Additional IRAP bands found in M. beccarii var. beccarii indicated that M. beccarii var. hottana might be evolutionarily more ancient than M. beccarii var. beccarii because LTR retrotransposons are not transpositionally removed.
基金Supported by the 10th Five-year Chinese National Programms for Science and Technology Development (Grant No. 2001BA707B01)National Natural Science Foundation of China (Grant No. 30621092)Natural Science Foundation of Yunnan Province (Grant No. 2005PG11)
文摘To investigate the genetic diversity of Tricholoma matsutake,we studied ITS and IGS1 sequences and PCR polymorphism of a retrotransposon in 56 fruit bodies collected from 13 counties of 9 regions in Yunnan Province. We found one and three haplotypes based on ITS and IGS1 sequences,respectively. Moreover,there was no significant difference in PCR polymorphism of the retrotransposon among different populations. Compared with Jilin Province(China) and Japanese populations,although Yun-nan was highly homogenous to Japanese populations,low genetic diversity of T. matsutake in Yunnan did not support the view that this species originated from Yunnan.
