Evaluation of brachycephalic obstructive airway syndrome breeding test results in Finland from 2017 to 2022.

IF 1.9 2区 农林科学 Q2 VETERINARY SCIENCES
Liisa Iiris Onerva Lilja-Maula, Katariina Helena Mäki, Mimma Kristiina Aromaa, Minna Marjaana Rajamäki
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引用次数: 0

Abstract

Background: Brachycephalic obstructive airway syndrome (BOAS), observed in many flat-faced dog breeds, is one of the most urgent welfare problems in pedigree dogs. Various breeding schemes against BOAS have been implemented in many countries during recent years, but their impact on breed health remains unknown. The BOAS breeding test, used by the Finnish Kennel Club (FKC), includes an exercise component with a recovery assessment, BOAS grading by a veterinarian that evaluates upper respiratory signs before and after exercise, and a nostril stenosis assessment. The aim of our study was to evaluate BOAS breeding test results and estimate the heritability of the BOAS grade using parent-offspring regression from FKC data collected during 2017-2022.

Results: The majority (80%) of dogs (n = 957) participating in FKC BOAS testing were English Bulldogs, French Bulldogs, and Pugs. In 2022, 89-100% of the litters from these three breeds registered with the FKC had at least one parent tested for BOAS. The proportion of dogs failing the exercise test was highest in English Bulldogs (11%), followed by French Bulldogs (4%) and Pugs (3%). In these three breeds, moderate to severe BOAS signs were reported in 28%, 22% and 30% of dogs, respectively. The proportion of moderate to severe nostril stenosis was highest (71%) in Pugs, followed by French Bulldogs (55%), and English Bulldogs (40%). Estimates of heritability for BOAS grade were separately calculated for these three breeds and for all dogs, and the estimates were moderate to high, ranging from 0.39 to 0.58.

Conclusions: The exercise test alone did not sufficiently identify dogs with moderate to severe BOAS signs. To better consider the complex nature of BOAS and breed differences, exercise tolerance, the severity of upper respiratory signs (BOAS grade) and nostril stenosis should all be assessed together in breeding animals. The heritability estimates for veterinary-assessed BOAS grade indicated that BOAS grade could be used in selective breeding to obtain less-affected offspring.

2017 至 2022 年芬兰手足阻塞性气道综合征育种测试结果评估。
背景:在许多扁平脸犬种中观察到的 "脑性阻塞性气道综合征"(BOAS)是纯种犬最紧迫的福利问题之一。近年来,许多国家都实施了各种针对BOAS的育种计划,但这些计划对犬种健康的影响仍不得而知。芬兰犬业俱乐部(FKC)采用的 BOAS 繁殖测试包括运动和恢复评估、由兽医对运动前后的上呼吸道症状进行评估的 BOAS 分级以及鼻孔狭窄评估。我们的研究旨在评估BOAS育种测试结果,并根据2017-2022年期间收集的FKC数据,采用亲代-子代回归法估算BOAS分级的遗传率:参加 FKC BOAS 测试的大多数(80%)犬只(n = 957)是英国斗牛犬、法国斗牛犬和巴哥犬。2022 年,在 FKC 注册的这三个犬种的幼犬中,89%-100% 的幼犬至少有一个亲本接受了 BOAS 检测。未能通过运动测试的犬只中,英国斗牛犬的比例最高(11%),其次是法国斗牛犬(4%)和巴哥犬(3%)。在这三个犬种中,分别有 28%、22% 和 30% 的犬只出现中度至重度 BOAS 症状。中度至重度鼻孔狭窄的比例在巴哥犬中最高(71%),其次是法国斗牛犬(55%)和英国斗牛犬(40%)。对这三个犬种和所有犬种的 BOAS 分级遗传率分别进行了计算,估计值为 0.39 至 0.58,属于中等偏高:仅通过运动测试并不能充分识别具有中度至重度 BOAS 征兆的犬只。为了更好地考虑 BOAS 的复杂性和品种差异,应在育种动物中同时评估运动耐力、上呼吸道症状的严重程度(BOAS 分级)和鼻孔狭窄。兽医评估的 BOAS 分级的遗传率估计值表明,BOAS 分级可用于选择性育种,以获得受影响较小的后代。
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来源期刊
Acta Veterinaria Scandinavica
Acta Veterinaria Scandinavica 农林科学-兽医学
CiteScore
3.60
自引率
0.00%
发文量
28
审稿时长
18-36 weeks
期刊介绍: Acta Veterinaria Scandinavica is an open access journal encompassing all aspects of veterinary research and medicine of domestic and wild animals.
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