基于主观和图像的角蝇丰度表型的遗传参数

IF 2.1 Q1 AGRICULTURE, DAIRY & ANIMAL SCIENCE Frontiers in animal science Pub Date : 2023-11-16 DOI:10.3389/fanim.2023.1284684
Amanda M Warner, Bradley Heins, Nancy C. Hinkle, T. Pringle, S. Aggrey, R. Rekaya
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引用次数: 0

摘要

角蝇丰度的遗传基础在很大程度上仍是未知的,只有少数基于小规模研究的遗传率估计。本研究分析了一种主观表型和两种基于图像的苍蝇丰度表型。每只动物都由至少一名训练有素的人员(SUB)对苍蝇数量进行主观评估。此外,还拍摄了几张数字图像,并使用每只动物的最佳图像来评估苍蝇数量。建立一个大致从腰到钩,从胸底到乳房前部的方框,计算方框内的所有角蝇(PA)和基于取样的估计蝇数(PR)。角蝇数量(SUB、PA 和 PR)根据其各自分布的四分位数分为 4 个等级。连续和离散情况下的遗传率估计值分别介于 0.10 和 0.15 之间以及 0.14 和 0.16 之间。在连续病例中,PA 和 PR 之间的遗传相关性为 0.66,在基于图像(PA 和 PR)和主观(SUB)评估之间的遗传相关性显著降低。在离散情况下,三个性状之间的遗传相关性非常接近,表明性状之间具有高度一致性。
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Genetic parameters of subjective and image-based horn fly abundance phenotypes
The genetic basis of horn fly abundance remains largely unknown and only few heritability estimates are available based on small scale studies. In this study, one subjective and two image-based fly abundance phenotypes were analyzed. Each animal was assessed subjectively for fly abundance by at least one trained agent (SUB). Additionally, several digital images were taken and the best image for each animal was used to assess fly abundance. A box that runs roughly from the withers to the hook and from the chest floor to the fore of the udder was established and all horn flies (PA) and sampling-based estimated number of flies (PR) within the box were calculated. Horn fly counts (SUB, PA, and PR) were discretized into 4 classes based on the quartiles of their respective distributions. Heritability estimates ranged between 0.10 and 0.15 and between 0.14 and 0.16 for the continuous and discrete cases, respectively. The genetic correlation was 0.66 between PA and PR and decreased significantly between the image-based (PA and PR) and the subjective (SUB) assessments for the continuous case. For the discrete case, the genetic correlations between the three traits were very similar, indicating a high concordance between traits.
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CiteScore
2.30
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审稿时长
13 weeks
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