Gao San-hong

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Zhengfeng Wang

Lanzhou University

Shaolin Peng

Sun Yat-sen University

Yanru Hao

Ministry of Agriculture and Rural Affairs

Shenglei Fu

National Pingtung University of Science and Technology

Peng Shaolin

Sun Yat-sen University

Tian Sheng-ni

Anhui Agricultural University

Mary Jo W. Godt

University of Georgia

Cooperative Institutions

South China Botanical Garden

Chinese Academy of Sciences

Sun Yat-sen University

Ministry of Agriculture and Rural Affairs

Huazhong Agricultural University

Hainan Normal University

Inner Mongolia Agricultural University

Second Affiliated Hospital of Jilin University

Chinese Academy of Medical Sciences & Peking Union Medical College

Shanxi Agricultural University

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Cryptocarya chinensis Spatial Distribution Patterns Caused by Human Disturbance in the Lower Subtropical Monsoon Evergreen broad-leaved Forest

生態學報 (2005)

Zhengfeng Wang Gao San-hong Mary Jo W. Godt Peng Shaolin Shenglei Fu

Lower subtropical monsoon evergreen broad leaved forests are of high conservation significance in Sooth China. Because of human activities, the forest has been largely destroyed; the remaining fragments are now mainly in several protected reserves. To further protect this forest outside the reserves and to study human influences on it, we analyzed the spatial pattern of Cryptocarya chinensis, a dominant tree in the forest near Changlong village, Guangzhou, China. Compared with low human disturbance forests, in which C. chinensis was clumped, we found that trees were randomly distributed, especially the young life stages. Human activities in this forest have also led to the decline of the C. chinensis seedling bank, suggesting that the population is regenerating badly.

Evergreen forest

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Genetic Diversity of Cryptocarya chinensis Life Stages in Heishiding, Guangdong Province

Zhiwu yichuan ziyuan xuebao (2005)

Gao San-hong

ISSR markers were used to examine genetic diversity in three different life stages of Cryptocarya Chinensis in Heishiding, Guangdong Province. The results indicated the level of genetic diversity of C. chinensis (H_T=0.0901) was low compared with those species with the similar life history. The genetic diversity decreased from adults, juveniles to seedlings, and the degree of genetic differentiation between life stages was G_(st)=0.1410,_(st)=0.0659. Low gene flow between populations may cause the low genetic diversity in C. chinensis. However, the genetic differentiation might be attributed to sampling deviation.

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Genetic Diversity of Imperata cylindrica Populations Colonizing on the Metal Tailings Waste Lands by ISSR Technique

Acta Scientiarum Naturalium Universitatis Sunyatseni (2006)

Tian Sheng-ni Zhengfeng Wang Gao San-hong Yanru Hao Shaolin Peng

The genetic diversities of six I.cylindrica populations were determined by ISSR technique.The sample materials were collected in Anhui province from four different copper tailings,one lead-zinc tailings waste land and the normal soil far away from mine areas.Out of 100 ISSR primers,10 primers generated highly reproducible and stable DNA bands.Using these primers,139 discernible DNA fragments were produced for the 180 samples of six I.cylindrica populations.The number of polymorphic loci was 132,and the percentage of polymorphic loci was 94.96%.The result of POPGENE analysis indicated the whole genetic diversity(Ht) of I.cylindrica was 0.312 5,and the genetic diversity(Hs) among the populations was 0.226 5.The genetic diversity,Shannon index and percentage of polymorphic loci for the population growing on the normal soil were higher than other five populations on the metal tailings waste land.The results of AMOVA and PCA analysis indicated genetic differentiation had taken place signally among the six populations colonizing(φ_(st) =0.030,P0.002).From the results of this studies,the high genetic diversity of I.cylindrical may contribute to colonize on the copper tailings and lead-zinc tailings.

Imperata

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Genetic Diversity of Cryptocarya Chinensis Life Stages in Dinghu Mountain,China

Acta Scientiarum Naturalium Universitatis Sunyatseni (2005)

Gao San-hong

Genetic diversity and population structure of Cryptocarya Chinensis were examined in three different life stages (adults, juveniles, seedlings) in Dinghu mountain using ISSR markers. The results indicated the level of genetic diversity of C. chinensis(H_e=0\^1090) was relatively low compared with those species with similar life history, and the degree of genetic differentiation between life stages (G_(st)=0\^0890,_(st)=0\^064 4) was low. Seedlings had higher genetic diversity than adults and juveniles. We also found the increase in genetic distance from adults to seedlings. Compared with the similar life history species, C.chinensis has relatively low genetic diversity, which may be caused by low gene flow between populations. However, genetic differentiation might be attributed to sampling deviation.

Genetic distance

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