The heritability of pampiniform plexus vessel size and varicocoele in boars

Tasha R. Gruhot, Lea A. Rempel, Matthew L. Spangler, Stephen D. Kachman, Benny E. Mote

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Ultrasonography was used to capture a coronal–sagittal image of the veins of the pampiniform plexus (PP) and the testicular artery of 327 maternal-line boars at approximately 6 months of age at the University of Nebraska—Lincoln. Varicocoele was diagnosed by two methods. Method 1 diagnosed varicocoele when the average vessel area on one side of the scrotum was 1.5 times larger than the average vessel area on the other side of the scrotum. Method 2 diagnosed varicocoele when the average vessel area on one side of the scrotum of a boar was 1.5 times larger than the average vessel on the same side of the scrotum of the boar's cohorts (same population and year). Varicocoele was diagnosed in 23.17% and 15.1% of boars measured using method 1 and method 2, respectively. Ultrasonography showed to be an effective means to measure PP vessel size in boars and may even allow for earlier detection of varicocoele than by using palpation. Animal models were employed to estimate the heritability for: average area of right PP vessels (0.52), average area of the left PP vessels (0.46), varicocoele presence using method 1 (0.26) and varicocoele presence using method 2 (0.25). These heritability estimates suggest that vessel size and varicocoele could be selected against in breeding programmes to potentially improve boar semen quality.

Original languageEnglish (US)
Pages (from-to)270-274
Number of pages5
JournalReproduction in Domestic Animals
Volume54
Issue number2
DOIs
StatePublished - Feb 1 2019

Keywords

  • heritability
  • pampiniform plexus
  • swine
  • varicocoele

ASJC Scopus subject areas

  • Biotechnology
  • Animal Science and Zoology
  • Endocrinology

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