DNA markers reveal genetic diversity of Indian mango
doi:10.1038/nindia.2021.80 Published online 27 May 2021
A study has identified specific DNA markers that reveal the genetic variability of mango varieties (Mangifera indica L) grown in different parts of India.
The markers show that the mango from east India, particularly the local genotypes of Odisha, have the highest genetic variability, followed by those from south, west and north India.
Knowledge about the genetic background of the parent mango is a necessary prelude to developing new varieties that could adapt to the changing climatic conditions, a research team from the Utkal University in Odisha says.
To date, only a few reports had shed light on the links between multiple markers and genetic diversity in Indian mango. To better understand this, the scientists analysed multiple markers, including gene-targeted and sequence-specific marker systems, in 70 Indian mango genotypes.
Based on their geographical origin, the mango genotypes were grouped into four populations: east India, west India, north India and south India. Additionally, these genotypes were clubbed into three different populations (selection, hybrid and local) based on their fruit status.
The researchers found that the north Indian mango genotypes showed moderate values for genetic diversity. They found that the eastern and southern mango genotypes possess relatively higher genetic variation than the other populations.
The mango variety with higher genetic variation have a greater capability to acclimatise and evolve, the researchers say. The high level of genetic diversity of east Indian mango may be attributed to specific variants of genes and advantageous tropical growing conditions, they note.
1. Jena, R. C. et al. Multiple DNA marker‑assisted diversity analysis of Indian mango (Mangifera indica L.) populations. Sci. Rep. 11, 10345 (2021)