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Journal of Animal Science and Technology
(JAST)영문학술지
Vol. 56, 57(2014~)
[한국동물자원과학회]
▣ 편집위원장 : 최인호
▣ 편집위원 : 정호영, 최창원, 이철영, 오세종, 김관석,
    이홍구, 송민호, 김은중, 조철훈

논문번호 :
1428
학회지년월 : 201812
접수일자 : 2018-06-20 채택일자 : 2018-12-03
전공분야 : 성장생물학
조 회 수 : 5
Comparative evaluation of ultrasonography
with clinical respiratory score in diagnosis
and prognosis of respiratory diseases in
weaned dairy buffalo and cattle calves

Hussein Awad Hussein1*, Cagri Binici2 and Rudolf Staufenbiel2

Background: Respiratory troubles have economic impacts in countries where livestock industry is an important
segment of the agricultural sector, as well as these problems may cause significant economic losses for bovine
producers. Various practical methods are used to assess diseases that affect the bovine respiratory system.
Ultrasonography is a noninvasive tool that has been used frequently in diagnosis of various animal diseases. The
present study was designed to establish whether thoracic ultrasonography is a diagnostic tool for detection of
respiratory troubles in weaned buffalo and cattle calves, as well as to assess its prognostic value in comparison with
clinical respiratory scores. Thirty five (15 buffalo and 20 cattle) calves were included. Twelve (6 buffalo and 6 cattle)
clinically healthy calves were enrolled as controls.
Results: Based on physical examinations, clinical respiratory scores (CRS), ultrasound lung scores (ULS) and
postmortem findings, animals were classified into 4 groups as pulmonary emphysema (n = 8), interstitial pulmonary
syndrome (n = 7), bronchopneumonia (n = 12), and pleurisy (n = 8). The mean values of CRS and ULS were
significantly higher in diseased calves (P < 0.01). In calves with pulmonary emphysema and interstitial syndrome,
thoracic ultrasonography revealed numerous comet-tail artifacts, which varied in numbers and imaging features.
Furthermore, variable degrees of pulmonary consolidation with alveolograms and bronchograms were noticed in
bronchopneumonic calves. In addition, thick irregular or fragmented pleura with pleural effusions and fibrin shreds
were imaged in calves with pleurisy. A weak correlation was calculated between CRS and ULS (r = 0.55, P < 0.01).
Hematologically, the counts of white blood cells, activities of aspartate aminotransferase and partial tensions of
carbon dioxide were significantly increased in all diseased groups. Serum concentrations of total globulins were
higher in claves with bronchopneumonia (P < 0.05). The partial tension of oxygen was decreased in all diseased
calves (P < 0.05).
Conclusions: Thoracic ultrasonography is a diagnostic tool for various lung troubles and assessment the grade and
severity of pulmonary diseases, as well as it can be used as a follow-up tool for evaluating the prognosis of
respiratory troubles and monitoring the efficacy of therapies.
Keywords: Bronchopneumonia, Calves, Emphysema, Interstitial pulmonary syndrome, Prognosis
논문번호 :
1429
학회지년월 : 201812
접수일자 : 2018-09-27 채택일자 : 2018-12-08
전공분야 : 성장생물학
조 회 수 : 1
Effects of weaning and castration ages on
growth performance, blood metabolites,
and carcass characteristics in Hanwoo
steers

Hwan Lim2†, Jun Sang Ahn1†, Min Ji Kim2, Gi Hwal Son2, Joong Kook Park3, Jae Yoon Shim2, Il Young Kim2,
Ji Hyung Kim2, Sung Myoun Cho2, Eung Gi Kwon1, Jong Suh Shin2 and Byung Ki Park3*

Background: Recently, as production costs have been increasing owing to rising feed prices worldwide, shortening
the age of slaughter has been recognized as a way to increase farm income. In Korea, the raising period for
Hanwoo steers is over 31 months with the delay of weaning and castration stated as one of the reasons for the
increase in the raising period. Thus far, studies on age of weaning and castration have been conducted individually,
and there have been no studies on the combined effects of weaning and castration ages on the growth
performance and carcass characteristics in Hanwoo steers.
Methods: Weaning ages were calculated at 80 or 130 days of age, and castration ages were calculated at 90 days
and 180 days of age. Calves were allocated to one of the four treatment groups: W80C90 (weaning at 80 days of
age and castration at 90 days of age), W80C180, W130C90, and W130C180.
Results: For the entire experimental period, weaning and castration ages did not significantly affect growth
performance of Hanwoo steers. In addition, weaning and castration ages did not affect the overall yield and
quality traits of carcass in Hanwoo steers.
Conclusion: Weaning and castration ages had small effects on growth performance and carcass characteristics in
Hanwoo steers. Therefore, the early weaning and castration ages are recommended to reduce the slaughter age
without any negative effects on meat quality grade.
Keywords: Hanwoo, Weaning, Castration, Growth performance, Carcass characteristics
논문번호 :
1430
학회지년월 : 201812
접수일자 : 2018-07-26 채택일자 : 2018-12-12
전공분야 : 유전및육종
조 회 수 : 6
Single nucleotide polymorphisms in
candidate genes associated with milk yield
in Argentinean Holstein and Holstein x
Jersey cows

Mar&iacute;a Agustina Raschia1* , Juan Pablo Nani2, Daniel Omar Maizon3, Mar&iacute;a Jos&eacute; Beribe4,
Ariel Fernando Amadio2,5 and Mario Andr&eacute;s Poli1

Background: Research on loci influencing milk production traits of dairy cattle is one of the main topics of investigation
in livestock. Many genomic regions and polymorphisms associated with dairy production have been reported worldwide.
In this context, the purpose of this study was to identify candidate loci associated with milk yield in Argentinean dairy
cattle. A database of candidate genes and single nucleotide polymorphisms (SNPs) for milk production and composition
was developed. Thirty-nine SNPs belonging to 22 candidate genes were genotyped on 1643 animals (Holstein and
Holstein x Jersey). The genotypes obtained were subjected to association studies considering the whole population and
discriminating the population by Holstein breed percentage. Phenotypic data consisted of milk production values
recorded during the first lactation of 1156 Holstein and 462 Holstein x Jersey cows from 18 dairy farms located in the
central dairy area of Argentina. From these records, 305-day cumulative milk production values were predicted.
Results: Eight SNPs (rs43375517, rs29004488, rs132812135, rs137651874, rs109191047, rs135164815, rs43706485, and
rs41255693), located on six Bos taurus autosomes (BTA4, BTA6, BTA19, BTA20, BTA22, and BTA26), showed suggestive
associations with 305-day cumulative milk production (under Benjamini-Hochberg procedure with a false discovery rate
of 0.1). Two of those SNPs (rs43375517 and rs135164815) were significantly associated with milk production (Bonferroni
adjusted p-values < 0.05) when considering the Holstein population.
Conclusions: The results obtained are consistent with previously reported associations in other Holstein populations.
Furthermore, the SNPs found to influence bovine milk production in this studymay be used as possible candidate SNPs
for marker-assisted selection programs in Argentinean dairy cattle.
Keywords: Milk production, Dairy cattle, Candidate genes, Association study, Single nucleotide polymorphisms
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