TAILIEUCHUNG - Genetic variation and outcrossing rate of Dipterocarpus Dyeri in the Tan Phu tropical rain forest (Dong Nai), Vietnam

Dipterocarpus dyeri (Dipterocarpaceae) is widely distributed in lowland rainforests in southeastern Vietnam. Due to over-exploitation and habitat destruction in the 1980s and 1990s, this species is listed as threatened. Understanding the genetic variation and mating rate among D. dyeri population that occurs in forest patches is necessary to establish effectively conservation strategies for this species. To conserve the species in tropical forests, genetic diversity and mating rate were investigated using eight microsatellites (single sequence repeat, SSR) as markers. All of the eight loci were polymorphic. A total of 36 different alleles were observed across the loci screened. The SSR data indicated high genetic diversity (NA = ; HO = and HE = ) and high inbreeding value, FIS= 0,182. The mating system parameters were determined using the mixed mating model and the results indicated high outcrossing rate (tm= and ts= ) and lowselfing rate (). Difference of tm-ts value indicated that inbreeding contributed to selfing rate for this species in the Tan Phu tropical rain forest. The results reflected that D. dyeri habitat in this area has been restored and the number of individuals was high, about 500 individuals. However, seedlings were not found so far in this study. These results indicated the importance of conserving of the genetic resources of Dipterocarpus dyeri species in the Tan Phu rain forest. The conservation strategy should include an establishment of an ex-situ conservation site with new big population for this species from all genetic groups, which might improve its fitness under different environmental stresses. | Genetic variation and outcrossing rate of Dipterocarpus Dyeri in the Tan Phu tropical rain forest (Dong Nai), Vietnam

• Sinh học
• Genetic variation and outcrossing rate
• Dipterocarpus Dyeri
• The Tan Phu tropical rain forest
• Species conservation
• Genetic diversity
• Genetic variability
• Similarity coefficient
• Soybean genotypes
• Genetic diversity analysis
• Molecular marker based genetic diversity
• Molecular marker
• Maize genetic diversity
• Very easy digestible
• Abiotic factor
• Genetic diversity in sunflower
• Sunflower (Helianthus annuus L )
• Inter varietal hybridization programme
• Assessment of genetic diversity
• Genetic diversity among fenugreek
• Fenugreek genotypes
• ISSR markers
• Genetic improvement
• Sequence related amplified polymorphism
• Simple sequence repeat
• Genetic diversity of watermelon
• Brassica compestris
• Genetic diversity analysis based
• Molecular level
• Onion genotypes through RAPD
• Genetic diversity remarkably
• Genetic diversity in Gangatiri cow
• Gangatiri cow
• Employing RAPD marker
• Threatened cycads (cycadaceae)
• Conservation of genetic diversity
• High propagules
• Levels of genetic diversity
• Inter Intra cluster distance
• Chickpea genotypes
• Genetic diversity in reference set
• Genetic advance
• Rainfed rice
• Rainfed rice genotypes
• Genetic diversity in rainfed rice genotypes
• Bottle gourd
• Genetic diversity in bottle gourd
• Yield improvement
• Diversity analysis
• Genetic diversity analysis in sunflower
• Parental lines
• RAPD markers
• Solanum lycopersicon L
• Genetic diversity studies
• Genetic diversity studies in tomato
• D2 statistics
• Genetic divergence
• Random amplified polymorphic DNA
• Polymerase chain reaction
• Genetic diversity analysis of citrus cultivars
• D2 analysis
• Landraces and salinity
• Saline stress condition
• Genetic diversity in traditional landraces
• Rice for yield
• Principal component analysis
• Principal component analysis approach
• Brinjal (Solanum melongena L
• Pinus kwangtungensis
• Pa Co pine (Pinus kwangtungensis Chun ex Tsiang)
• RAPD and ISSR markers
• Genetic diversity in Pa Co pine
• Thirty five genotypes
• Oilseed brassica species
• Gossypium hirsutum L
• Cotton germplasm
• Agro morphological characterization
• PIC and marker
• Genetic diversity in hybrids of tomato
• Tomato (Solanum lycopersicum L
• SSR markers
• Molecular characterization
• Soybean varieties
• Genetic diversity assessment
• Agarose gel electrophoresis
• ISSR primers
• Susceptible genotypes
• Genetic diversity in upland cotton
• Molecular markers
• Mungbean [Vigna radiata (L ) Wilczek]
• Screening and identification
• Identification of ssr markers
• Genetic diversity for mungbean
• Mahalanobis D2 statistics
• Genetic diversity in okra
• West Godavari district during kharif season
• Twenty nine hybrids