Morphological structure of Zulu sheep based on principal component analysis of body measurements

Mavule, Bafowethu Sibanda; Muchenje, Voster; Bezuidenhout, Cornelius Carlos; Kunene, Nokuthula W.

doi:10.1016/j.smallrumres.2012.09.008

Cited by 54 publications

(98 citation statements)

References 8 publications

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“…Therefore, body condition score appeared to be a more useful trait in assessing nutritional consequences than live weight body prediction under extensive management systems. In agreement with the present study, Hassen et al (2012) and Gebreyesus (2010) for some Ethiopian goats; and Mavule et al (2013) for sheep reported the highest correlation between body weight and chest girth. This shows that chest girth might be the best trait to predict live body weight for both goats and other livestock species.…”

Section: Relationships Between Body Weight and Other Linear Body Meassupporting

confidence: 92%

“…Traits like BC, BW, CW and HL in females and BC, BW, CW, PW, HL and EL in bucks were found to have over 10% overall CV value for all three goat types. According to Mavule et al (2013), large variation observed in body measurements is a result of absence of selection, or the body parts are affected more by the environment than others.…”

Section: Phenotypic Characteristicsmentioning

confidence: 99%

See 1 more Smart Citation

Husbandry practices and phenotypic characteristics of indigenous goat populations in Ethiopia

Gatew¹,

Hassen²,

Kebede³

et al. 2017

Afr. J. Agric. Res.

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The present study was conducted with the objective to characterize the husbandry practices and phenotypic characteristics of mature Bati, Borana and Short-eared Somali goats kept under traditional management systems so that the information generated can be used in designing breeding programs. The study covered five districts in four administrative zones of Ethiopia representing Bati (in Oromia Zone) and Kalu (in South Wollo Zone) for Bati goats; Yabello (in Borana Zone) for Borana goats and Shinille and Erer (in Siti Zone) for Short-Eared Somali goats. A total of 345 households interview was made and phenotypic measurements were taken on 601(468 females and 133 males) heads of adult goats with 4 pair of permanent incisors (PPI). However, because of difficulty of finding adequate number of 4PPI sample males, measurements were taken from 2PPI and above males. In this study, in number, goats accounted for 72.01, 50.93 and 47.38% of other livestock species in Siti, around Bati and Borana, respectively. The least square mean (±SE) of goat flock size (44.02±3.33) per household in Siti was significantly (p<0.05) higher than those observed in Borana (23.08±1.94) and Bati area (8.99±0.59). The major challenges of goat rearing in the studied areas include feed and water shortage, disease incidence and recurrent drought with different order of prioritization. Plain brown (deep and light) (51.85%) coat color was the predominant coat color observed on Bati goats of both sexes. Meanwhile, plain white coat color was most frequently observed on Borana goats (71.54%) and only 36.27% in Short-eared Somali goats. Though most quantitative traits showed slightly higher average values in the Bati goats, differences with Borana goats were not significant (p>0.05),whereas Short-eared Somali goats remained significantly (p<0.05) lower for most of the body measurement characteristics. The canonical analysis done on phenotypic measurements also put Bati and Borana goats closer by discriminating Short-eared Somali goat populations. The similarities between Bati and Borena goats and significance divergence of Short-eared Somali goats in phenotypic measurements suggested that the need of further molecular characterization study to validate information from phenotypic characterization. Correlation coefficient was consistently highest between live weight and chest girth in both sexes across the goat populations. Hence, linear measurements could be valuable to estimate live body weight for those farm communities where sensitive weighing scales are not readily available.

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Section: Relationships Between Body Weight and Other Linear Body Meassupporting

confidence: 92%

Section: Phenotypic Characteristicsmentioning

confidence: 99%

Husbandry practices and phenotypic characteristics of indigenous goat populations in Ethiopia

Gatew¹,

Hassen²,

Kebede³

et al. 2017

Afr. J. Agric. Res.

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show abstract

“…Coefficient of variation for body weight (14.80) could be important for selection and improvement. In an earlier study of Zulu sheep (Mavule et al, 2013) also reported similar pattern with BW, TL and EL as the most variable and HG, WH and BL as homogenous measurements. While in adult hill goat of Assam (Khargharia et al, 2015) the body weight showed the maximum variation (14.99) followed by paunch girth (9.63) and rump width (9.55).…”

Section: Resultssupporting

confidence: 72%

“…The study revealed that body measurements except for peripheral traits (tail, ear and horn) were mostly positively and significantly correlated (p<0.05) in both the age groups. In study of Zulu sheep (Mavule et al, 2013) the correlation of body weight with ear length and tail length related combination was also reported on lower side.…”

Section: Phenotypic Correlationmentioning

confidence: 89%

Morphological structuring using principal component analysis of Rampur-Bushair sheep under transhumance production in western Himalayan region, India

Sankhyan

Thakur

Katoch

et al. 2017

IJAR

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Principal component analysis (PCA) was employed on 12 biometric traits of Rampur-Bushair sheep of Himachal Pradesh. Morphological and biometrical observations were recorded on 162 young and 566 adult animals. Multivariate statistics and principal component analysis revealed that body measurements except for peripheral traits were mostly positively and significantly correlated. The correlation among conformation traits ranged from -0.08 to 0.79 and "0.18 to 0.71 in young and adult sheep respectively. Three and four factors were extracted in young and adult sheep respectively, which accounted for 57% and 61% of variation. The principal component extracted contributed effectively to explain general body conformation. The regression analysis suggested that use of principal component was more appropriate than the use of original correlated variable in estimating body weights. Therefore, factor extracted could be helpful in breeding programme with sufficient reduction in the number of biometric traits to be recorded to explain the body conformation.

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“…Integration of farmers' practices with our design did not adversely affect efficiency of the breeding program as can be seen from the genetic progress achieved in body weight. This can be explained by the high genetic (Janssens and Vandepitte, 2004;Afolayan et al, 2007) and phenotypic (Mavule et al, 2013b) correlations between body weights and linear size traits in sheep. A significant correspondence between farmers' and experts' selection criteria for the Menz sheep has also been observed in an earlier study (Gizaw et al, 2011).…”

Section: Discussionmentioning

confidence: 99%

Efficiency of selection for body weight in a cooperative village breeding program of Menz sheep under smallholder farming system

Gizaw

Getachew

Goshme

et al. 2014

Animal

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We evaluated the efficiency of selection for body weight in a cooperative village breeding program for Menz sheep of Ethiopia under smallholder farming system. The design of the program involved organizing villagers in a cooperative breeding group to implement selective breeding of their sheep. The program was jump-started through a one-time provision of elite rams from a central nucleus flock, but subsequent replacement rams were selected from within the village flocks. We also evaluated body weight trends in a village where cooperative breeding was not implemented and individual farmers managed their flocks under traditional breeding practices. Under traditional breeding practices, genetic progress over 8 years either stagnated or declined in all the weights recorded. In the cooperative villages, selection differentials of 2.44 and 2.45 kg were achieved in 2010 and 2011 selection seasons, respectively. Birth weight, 3-month weight and 6-month weight increased, respectively, by 0.49, 2.29 and 2.46 kg in the third-generation lambs over the base generation. Improved rams supplied from the central nucleus flock gave an initial genetic lift of 14.4% in the 6-month weight. This was higher than the gain achieved from selection in the village flocks, which was 5.2%. Our results showed that village-based genetic improvement in body weights under smallholder conditions could be feasible if appropriate designs are adopted and that commencing with elite central nucleus rams help jump-start village-based programs.

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Morphological structure of Zulu sheep based on principal component analysis of body measurements

Cited by 54 publications

References 8 publications

Husbandry practices and phenotypic characteristics of indigenous goat populations in Ethiopia

Husbandry practices and phenotypic characteristics of indigenous goat populations in Ethiopia

Morphological structuring using principal component analysis of Rampur-Bushair sheep under transhumance production in western Himalayan region, India

Efficiency of selection for body weight in a cooperative village breeding program of Menz sheep under smallholder farming system

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