Genetic evaluation of Ethiopian Boran cattle and their crosses with Holstein Friesian for milk constituent traits in central Ethiopia

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cg.coverage.countryEthiopia
cg.coverage.iso3166-alpha2ET
cg.coverage.regionEastern Africa
cg.creator.identifierAynalem: 0000-0001-5914-0487
cg.identifier.urlhttp://www.academicjournals.org/jcab/PDF/Pdf2008/Oct/Haile%20et%20al.pdfen
cg.issue10en
cg.journalJournal of Cell and Animal Biologyen
cg.subject.ilriGENETICSen
cg.subject.ilriLIVESTOCKen
cg.subject.ilriDAIRYINGen
cg.volume2en
dc.contributor.authorHaile, Aynalemen
dc.contributor.authorJoshi, B.K.en
dc.contributor.authorAyalew, W.en
dc.contributor.authorTegegne, Azageen
dc.contributor.authorSingh, A.en
dc.contributor.authorYilma, Z.en
dc.date.accessioned2010-06-09T11:22:51Zen
dc.date.available2010-06-09T11:22:51Zen
dc.identifier.urihttps://hdl.handle.net/10568/1857
dc.titleGenetic evaluation of Ethiopian Boran cattle and their crosses with Holstein Friesian for milk constituent traits in central Ethiopiaen
dcterms.abstractBreed additive and non-additive effects, and genetic parameters of milk fat, protein, solids not fat (SNF) and total solids (TS) percents, were estimated in Ethiopian Boran cattle and their crosses with Friesian in central Ethiopia. Ethiopian Boran cattle were consistently superior (P<0.01) to the Ethiopian Boran- Holstein Friesian crosses for the milk composition traits studied. When the crosses were compared, the fat, protein, SNF and TS percents of 50 and 62.5% Holstein Friesian crosses were higher (P<0.01) than those of 75 and 87.5% genetic groups. The 50 and 62.5% genetic groups did not differ (P>0.05) in milk constituents. It was apparent, therefore, that as the exotic gene level increased the percentages of the milk constituents declined significantly. The individual additive genetic breed difference for milk composition traits were all significant (P<0.01). The estimates were -1.45 for fat, -0.97 for protein, -1.13 for SNF and -2.47 for TS percents. Crossbreeding of the Holstein Friesian with the Ethiopian Boran resulted in desirable and significant (at least P<0.05) individual heretosis for all milk composition traits. The estimates were 0.54 ± 0.09, 0.25 ± 0.10, 0.33 ± 0.15 and 0.72 ± 0.18 for fat, protein, SNF and TS percents, respectively. The maternal heterotic effects were non-significant (P>0.05) for all traits except for fat percent. Heritabilities of fat, protein, SNF and TS percents for Ethiopian Boran were 0.49 ± 0.03, 0.26 ± 0.05, 0.46 ± 0.04 and 0.45 ± 0.04, respectively. The corresponding estimates for crosses were 0.32 ± 0.04, 0.49 ± 0.03, 0.39 ± 0.04 and 0.41 ± 0.04, respectively. Within Ethiopian Boran breed selection accompanied by crossing should enormously improve these traits in crossbreds under such production system.en
dcterms.accessRightsOpen Access
dcterms.bibliographicCitationHaile, A.; Joshi, B.K.; Ayalew, W.; Tegegne, A.; Singh, A.; Yilma, Z. 2008. Genetic evaluation of Ethiopian Boran cattle and their crosses with Holstein Friesian for milk constituent traits in central Ethiopia. Journal of Cell and Animal Biology 2(10):171-176.en
dcterms.extentp. 171-176en
dcterms.issued2008-10-15
dcterms.languageen
dcterms.subjectmilken
dcterms.subjectcattleen
dcterms.typeJournal Article

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