Genetic diversity and population structure of endangered Aquilaria malaccensis revealed potential for future conservation

Journal of genetics

Pradeep Singh²  Brijmohan Singh Bhau¹  Akshay Nag²  Rajni Parmar²  Sneha Ghosh¹  Ram Kumar Sharma1² 

[1] Division of Medicinal Aromatic and Economic Plants, CSIR - North-East Institute of Science and Technology (CSIR-NEIST), Jorhat 785 006, India$$;Division of Biotechnology, CSIR - Institute of Himalayan Bioresource Technology, P.O. Box 6, Palampur 176 061, India$$

关键词: agarwood;    conservation;    home gardens;    genetic diversity;    population genetic structure;    amplified fragment length polymorphism.;   

DOI  :  

学科分类：生物科学（综合）

来源: Indian Academy of Sciences

【 摘 要 】

The endangered Aquilaria malaccensis, is an important plant with high economic values. Characterization of genetic diversity and population structure is receiving tremendous attention for effective conservation of genetic resources. Considering important repositories of biological diversity, the genetic relationships of 127 A. malaccensis accessions from 10 home gardens of three states of northeast India were assessed using amplified fragment length polymorphism (AFLP). Of the 1153 fragments amplified with four AFLP primer combinations, 916 (79.4%) were found to be polymorphic. Polymorphic information content (PIC) and marker index (MI) of each primer combination correlate significantly with the number of genotypes resolved. Overall, a high genetic diversity (avg. 71.85%) was recorded. Further, high gene flow (𝑁m : 3.37), low genetic differentiation (𝐹ST : 0.069) and high within population genetic variation (93%) suggests that most of the genetic diversity is restricted within population. Neighbour joining (NJ), principal coordinate analysis (PCoA) and Bayesian-based STRUCTURE grouped all the accessions in two clusters with significant intermixing between populations, therefore, revealed that two genetically distinct gene pools are operating in the A. malaccensis populations cultivated in home gardens. Based on the various diversity inferences, five diverse populations (JOH, FN, HLF, DHM and ITN) were identified, which can be potentially exploited to develop conservation strategies for A. malaccensis.

【 授权许可】

Unknown