Genetic Selection for Resistance to Gastrointestinal Parasitism in Meat Goats and Hair Sheep through a Performance Test with Artificial Infection of Haemonchus contortus
by Yoko Tsukahara (IGA Board member), Terry A. Gipson (IGA member), Steven P. Hart (IGA member), Lionel Dawson, Zaisen Wang, Ryszard Puchala, Tilahun Sahlu (IGA Board member), and Arthur L. Goetsch (IGA member)
Internal parasitism has been an important constraint to small ruminant production and anthelmintic resistance has become a worldwide issue. This study evaluated a 3-year genetic selection program through activities on-farm and a centralized performance test and also provided estimates of genetic parameters of growth and response to artificial infection with Haemonchus contortus by goats and sheep in the southcentral USA. Considerable species as well as breed differences were found in average daily gain and response to parasite infection. Average daily gain was greater for Boer than for Kiko and Spanish goats and slightly greater for Dorper than for St. Croix sheep. Infection level (number of eggs found in feces) of Spanish and St. Croix were relatively low each year, whereas that of Kiko and Dorper was lower after selection. An indicator of anemia (packed cell volume) did not always reflect infection level, which is probably reflective of differences among animals in resilience and susceptibility to haemonchosis. Moderate to high heritabilities were found for growth performance and response to parasite infection for growing meat goat and hair sheep males under a standardized environment that suggests considerable potential for genetic improvement through selection.
The 21st Japanese Society of Goat Science (JSGS) Meeting on Goat Pro-duction and Management was about to be canceled due to the influence of the COVID-19 pandemic; however, thanks to the passion and dedication of organizers to make it happen, this annual meeting was held as a web-based meeting on March 25, 2020. All the changes from ordinal face to face meetings to virtual meetings had to happen very quickly. We would like to thank all the members who participated.
At present, Japanese agricultural policy and social situations are facing major changes. There is an emerging sense of crisis in the direction that has been pursued only for efficiency. Instead, maintaining and revitalizing forgotten mountainous areas have become a major issue. Moreover, the desire for agricultural education and healing people in urban areas has been also increased. Consequently, the use of goats is once again receiving attention.
Written by Yoko Tsukahara, IGA Board member
The Asian Regional Conference on Goats (ARCG2018) was held at Amity University, Rajasthan, Jaipur, India on Oct. 22-26, 2018. The theme entitled “Current Challenges in Goat Industry and the Strategies to Combat in Asia Region.” A total of 287 researchers, professors, and producers from 14 countries including, Canada, China, Ecuador, France, Hungary, Japan, Mongolia, Spain, and the USA attended the meeting. The scientific program included keynote addresses, expert talks, oral and poster presentations, and brainstorming and valedictory sessions. The participants enjoyed a warm traditional welcome during the technical tour at the Central Sheep and Wool Research Institute which produces and conducts research on pure Sirohi goats, varieties of sheep and rabbit breeds, veterinary medical plants, and so on.
The 18th Japan National Summit, entitled “Ecological Life and Agriculture with Goats,” took place on November 12-13, 2016 in Aso, Kumamoto. The Aso area was severely damaged by the 2016 Kumamoto Earthquake with a magnitude 6.2 foreshock on April 14 followed by a magnitude 7.0 main-shock on April 15, which killed more than 50 people and evacuated 44,000.
The organizers faced difficulties in implementation of the Summit this year; however, they decided to make the Summit as a symbol of recovery. With their strong tie and efforts, the Summit was successfully conducted. Despite harsh accessibility due to reconstruction and damaged roads, the Summit welcomed more than 280 participants from all over the country.
The 18th JSGS Meeting
The 18th Japanese Society of Goat Science (JSGS) Meeting will take place on March 27, 2017 at the Faculty of Intercultural Studies, Kobe University, Kobe, Japan.
Registration for presenters ends February 28, 2017; please submit your
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