Interpretive Summary: A highly polymorphic caprine keratin-associated protein gene identified and its effect on cashmere traits
Written by Anne Zinn
Cashmere fiber is a main product of cashmere goats that is produced by secondary hair follicles, and, like wool, the cashmere fiber is composed of hair-keratins and keratin-associated proteins. These keratin-associated proteins serve as a matrix that cross-links hair-keratins and are therefore believed to play an important role in defining the physical and mechanical properties of the fiber. Five keratin-associated protein 6 genes (KRTAP6-5) have been identified in sheep and some variations have been associated with wool fiber diameter-related traits, but none of these homologues have been identified in goats. Given the potential effect of KRTAP6 on wool traits, investigation is needed to identify KRTAP6-n in goats and to determine whether variation in KRTAP6s affects cashmere traits. Therefore, a paper recently published in the Journal of Animal Science attempted to identify the caprine KRTAP6-5 to search for potential variation in the gene and to investigate its effect on cashmere fleece traits.
Efforts of this research reported the identification of the sheep KRTAP6-5 homologue on goat chromosome 1 and PCR-single strand conformation polymorphism analysis in 300 Longdong cashmere goats revealed the existence of 12 variant sequences. Variation in goat KRTAP6-5 was found to be associated with variation in mean-fiber diameter, suggesting that KRTAP6-5 is worthy of further study in the context of variation in cashmere traits.
The full paper can be found on the Journal of Animal Science webpage.
Written by Abdulhamid Karimi*, Nader Papi**, Farhad Mirzaei**
* Animal Science Department, Fars Agricultural and Natural Resources Research and Education Center, AREEO, Shiraz, Iran
** Animal Science Research Institute of Iran, Agricultural Research Education and Extension Organization (AREEO), Tehran, Iran
History of Abadeh Cashmere goat breeding in the province
The history of breeding Abadeh Cashmere goats is not well known. Livestock (sheep, goats) rearing is an essential job for people in Abadeh and Bavanat cities. They produce thousands of tons of meat, a wide variety of dairy products, as well as cashmere and goat hair every year.
Geographic distribution areas
Abadeh Cashmere goat are distributed in Fars province in Abadeh and some parts Bavanat.
Bruce McGregor, IGA member and former IGA Board member
Australia’s rural industries make a fundamental contribution to the Australian economy and way of life
Australia’s rural industries make a fundamental contribution to the Australian economy and way of life. In addition to the major industries, numerous new and emerging rural industries bring opportunity, diversity and resilience to rural Australia. The long-term sustainability of the rare natural animal fibre industries is of considerable importance both to the production industries and for economic and social benefits generated by value-adding processing of rare animal fibres in Australia. As these are new industries in Australia, there is substantial scope to improve production efficiency, fibre quality and value adding of these fibres.
To assist the development of these new industries this project focussed on two main issues:
About the Author
As a Research Scientist, Dr. Bruce McGregor B.Agr.Sc. (Hons), Ph.D., Advanced Cert. Textile Technology, has focussed on improving the production, fibre quality, processing and comfort properties of rare natural animal fibres including superfine wool, cashmere, mohair and alpaca. This led to Ph.D. studies on the quality of cashmere and its influence on textile materials produced from cashmere and blends with different qualities of superfine wool. Recently he was Program Leader of the Wool Comfort research conducted by the CRC for Sheep Industry Innovation. He has published over 150 scientific research papers plus numerous technical bulletins and advisory publications. Bruce has travelled widely to countries that produce rare natural animal fibres so he could understand the environmental, social and technological conditions in these regions. He has published a number of other reports that are available on the AgriFutures website
The International Goat Association promotes goat research and development for the benefit of humankind, to alleviate poverty, to promote prosperity and to improve the quality of life.