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Evaluation of the breeding soundness test for Bonga sheep in the context of a community-based breeding programme in Ethiopia

dc.date.accessioned2024-01-02T14:09:11Z
dc.date.available2024-01-02T14:09:11Z
dc.date.issued2023-12-29
dc.identifierdoi:10.17170/kobra-202312229275
dc.identifier.urihttp://hdl.handle.net/123456789/15335
dc.language.isoeng
dc.rightsNamensnennung 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectbreed improvementeng
dc.subjectoptimisationeng
dc.subjectselectioneng
dc.subjectsemeneng
dc.subjectsireeng
dc.subject.ddc590
dc.subject.ddc630
dc.titleEvaluation of the breeding soundness test for Bonga sheep in the context of a community-based breeding programme in Ethiopiaeng
dc.typeAufsatz
dcterms.abstractThe aims of this study were to evaluate sire selection traits and semen characteristics for Bonga sheep. A total of 101 sires with different birth year from the Bonga sheep community based breeding programme (CBBP) were used to collect data. The data was analysed by using the GLM procedure of SAS and least square means was separated by using adjusted Tukey-Kramer method. The breeding soundness tests consisted of physical examinations, sire body condition score (BCS), scrotum circumference, estimated breeding value (EBV), six months body weight (SMWT), and semen characteristics (volume, motility, and concentration) collected using an artificial vagina. The overall least square means ± SE for scrotum circumference, EBV, and six-month body weight of Bonga sheep were 28.20 ± 0.381 cm, 2.13 ± 0.326, and 24.69 ± 0.547 kg, respectively. Similarly, semen volume, mass motility, sperm concentration, and total spermatozoa of Bonga sheep was 1.14±0.076 ml, 4.28±0.138 million/ml, 4.25±0.195 billion/ml, and 4.86±0.393 billion/ml, respectively. A sire with thin BCS resulted in low scrotum circumference (P < 0.001) and questionable semen characteristics (P < 0.05). The body weight and the scrotum circumference of the Bonga sheep increased with age, but the breeding value fluctuated. Both a large scrotum and a good BCS sire produce a high volume of semen and has simultaneously better motility and concentration. This will enable to increase the fertility of a sire under CBBP. The scrotum circumference of Bonga sheep in relation to their body weight can be categorised as either satisfactory or excellent. Body weight of Bonga sheep was increased across sire birth year but fluctuating trend for breeding value. Scrotum circumference increased with increasing age from grower to mature stage of a sire. Both large scrotum circumference and good BCS sire produces high semen volume and has simultaneously better motility and concentration. This will enable to increase fertility of a sire under CBBP. We can categorize scrotum circumference of Bonga sheep either satisfactory or excellent with the proportion of their body weight.eng
dcterms.accessRightsopen access
dcterms.creatorAbate, Zelalem
dcterms.creatorAreb, Ebadu
dcterms.creatorBelay, Nahom
dcterms.creatorGebremikael, Adisu
dcterms.creatorGebresilase, Tegbaru
dc.subject.swdÄthiopienger
dc.subject.swdSchafger
dc.subject.swdZüchtungger
dc.subject.swdVerbesserungger
dc.subject.swdAuswahlger
dc.subject.swdSpermager
dc.subject.swdTauglichkeitger
dc.subject.swdZuchtprogrammger
dc.type.versionpublishedVersion
dcterms.source.identifiereissn:2363-6033
dcterms.source.issueNo. 2
dcterms.source.journalJournal of Agriculture and Rural Development in the Tropics and Subtropics (JARTS)eng
dcterms.source.pageinfo159-165
dcterms.source.volumeVol. 124
kup.iskupfalse


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