Latest News Archive

Please select Category, Year, and then Month to display items
Previous Archive
02 August 2022 | Story Leonie Bolleurs | Photo Leonie Bolleurs
Alistair Naidoo, second-year master’s student in Conservation Genetics and full-time technician in the Department of Genetics; Prof Paul Grobler, Head of the Department of Genetics; Prof Gordon Luikart; and Hannah Janse van Vuuren, third-year master’s student in Conservation Genetics.

It is an important and exciting time to be doing research in conservation genetics. This is according to Prof Gordon Luikart, Professor of Conservation Ecology and Genetics at the Flathead Lake Bio Station at the University of Montana in the United States. 

Prof Luikart, whose primary research focus is the application of genetics to the conservation of natural and managed populations, recently delivered a lecture, The Expanding Role of Genetics/omics in Wildlife Research and Conservation, on the Bloemfontein Campus of the University of the Free State (UFS). The lecture, hosted by the Department of Genetics, was attended by a group of students and lecturers in conservation and a number of related fields. 

He is one of the leading scientists in the field of conservation genetics, including integration of genomics in conservation projects. He is also co-author of the textbook Conservation and the Genomics of populations – the current prescribed textbook for GENE3744.

Species threatened with extinction

In 2008, the International Union for Conservation of Nature (IUCN) stated that approximately 10-20% of all vertebrate and plant species are threatened with extinction over the next few decades. In 1984, American biologist Edward O Wilson also said that it will take millions of years to correct the ongoing loss of genetics and species diversity caused by the destruction of natural habitats. “This is the folly our descendants are least likely to forgive us.”

Prof Luikart is of the opinion that genetics has enormous potential to help manage wildlife and prevent extirpation. “My research works to realise this potential and help wildlife managers conserve populations and ecosystems,” he says. 

Conservation managers and biologists have understood the risks of inbreeding for more than 100 years. In his lecture, one of the aspects of genetic conservation he focused on, was the negative effects of inbreeding and how this can be reversed using genetic rescue. 

With the genetic rescue study, they found that the gene flow into recently isolated populations can increase individual fitness and population growth. He proposed that conservation managers should consider genetic principles and rescue as practical and important tools. 

Prof Luikart also provided a list of information that can be retrieved from molecular genetic data to help conservation managers. This includes intel on census and effective population size, gene flow and dispersal, local adaptation and selection, forensics, genetic identification and law enforcement, and disease ecology and transmission. 

Non-invasive genetic monitoring

In terms of detecting gene flow, he focused on a study about non-invasive genetic monitoring that was conducted in the Yellowstone Park. Prof Luikart and a group of students collected the shed hair and faeces of the grizzly bear, obtained from trees and hair traps, which were used as a source of DNA. 

They established, for instance, that inbreeding depression is more common and stronger than previously thought in natural populations. Genetic monitoring, using non-invasive methods as described, has been found to be an effective tool that conservation managers should consider for detecting inbreeding and loss of genome-wide variation.

His research on the bighorn sheep, the alpine ibex, and the black bear informed most of the findings he discussed during his lecture.

News Archive

Early nutrition impacts on burden of disease
2017-11-15


 Description: Corinna Walsh read more Tags: Corinna Walsh read more

Prof Corinna Walsh during her inaugural lecture on ‘Nutrition in Transition’.
Photo: Stephen Collett 

“The first 1 000 days, from conception to two years, is a critical time to ensure that the early environment is optimal to guarantee the best outcomes,” Prof Corinna Walsh, Professor in the Department of Nutrition and Dietetics at the University of Free State (UFS), said. She delivered her inaugural lecture on Nutrition in Transition on 30 October 2017. 

During her lecture, Prof Walsh explained how an unfavourable early environment impacts on the health and well-being of both children and adults. She gave an overview of the prevalence of hunger and food insecurity in the Free State, and described the shift that has occurred from healthier traditional diets to more unhealthy Western diets accompanied by sedentary lifestyles. These patterns are closely linked to the triple burden of malnutrition, including undernutrition, micro-nutrient malnutrition, and obesity. Finally, Prof Walsh highlighted the double burden of disease, focusing on chronic lifestyle diseases on the one hand, and infectious diseases such as HIV/AIDS and TB on the other hand.

“Preparing for this lecture has given me the opportunity to reflect on the almost thirty years of my research journey, a process that I thoroughly enjoyed,” said Prof Walsh.

“It was a privilege to share the work of my research team with fellow colleagues as well as with family and friends,” she said. Prof Walsh is a National Research Foundation C-rated researcher and also served on the Board of the Medical Research Council from 2005 to 2010.

Foundations for health, growth established early
The first 1 000-day window focuses on the time between conception and the second birthday. “This is a critical period for growth and development,” Prof Walsh said. It is a unique period, as the foundations for health, growth, and neuro-development are established. It also focused on the implications of malnutrition, which is the biggest risk factor contributing to the global burden of disease.


Research identifies burden of disease
Her research has made a considerable contribution to identifying the burden of disease in the Free State. “It focuses on both malnutrition and infectious diseases such as HIV and TB on the one hand, and chronic lifestyle diseases such as obesity, diabetes, and hypertension on the other,” she said. The research team have also implemented a number of interventions to address these challenges, including programmes that have assessed the impact of nutrition-education programmes, household food gardens, and nutrition supplementation.

We use cookies to make interactions with our websites and services easy and meaningful. To better understand how they are used, read more about the UFS cookie policy. By continuing to use this site you are giving us your consent to do this.

Accept