What is intraspecific genetic diversity?
Intraspecific genetic diversity (IGD) is a fundamental biodiversity facet, as it informs the demographic and colonization history of populations (i.e. changes in effective population size over time and space), their level of biological connectivity, and their potential for adapting to environmental changes [14–16].
What is intraspecific variation?
Intraspecific variation, which includes the genomic and phenotypic diversity found within and among populations, is threatened by local extinctions, abundance declines, and anthropogenic selection. However, biodiversity assessments often fail to highlight this loss of diversity within species.
Is there genetic diversity in plants?
The genetic diversity among plant populations in a given species allows the plants to adapt to various environmental conditions. Such diversity could therefore yield valuable traits that could overcome the food-security challenges.
What is the importance of genetic diversity?
Genetic diversity is important because it gives species a better chance of survival. However, genetic diversity can be lost when populations get smaller and isolated, which decreases a species’ ability to adapt and survive.
What is the biological significance of intraspecific genetic diversity between populations?
Moreover, this rich intraspecific genetic diversity allows for the possibility of local adaptation and for differentiation in important physiological characteristics that produces local populations that are exceptionally fit and competitive in their respective local habitat.
Why is genetic diversity important in plants?
Ensuring genetic diversity is also important because it can strongly influence the long-term viability of plant populations, and their ability to adapt to changing climatic and environmental conditions.
How are new genes created?
Each new gene must have arisen from an already existing gene.” Gene duplication occurs when errors in the DNA-replication process produce multiple instances of a gene. Over generations, the versions accrue mutations and diverge, so that they eventually encode different molecules, each with their own function.
How is genetic diversity in plants measured?
The assessment of genetic diversity within and between plant populations is routinely performed using various techniques such as (i) morphological, (ii) biochemical characterization/evaluation (allozyme), in the pregenomic era, and (iii) DNA (or molecular) marker analysis especially single nucleotide polymorphism (SNPs …
What is the best source of new genetic variation in plant breeding?
Overall, the main sources of genetic variation are the formation of new alleles, the altering of gene number or position, rapid reproduction, and sexual reproduction.