Genetic Polymorphism in the Promoter and 5´ UTR of HSP-70 Gene in Three Strains of Indigenous Tswana Chickens and Commercial Broilers

Machete, James Buttie; Kgwatalala, Patrick Monametsi; Malambane, Goitseone; Nsoso, Shalaulani James; Moreki, John Cassius

doi:10.36380/jwpr.2021.48

Cited by 1 publication

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Meanwhile, amongst the cocks, the nakedneck strain showed marginally heavier body weight compared to the rest of the strains, while the thorax circumference and thigh length were on the upper limit for the tufted crest and feathered shank strains. The estimates of the effect of the chicken strains on the body weight and linear measurements recorded in this study are comparable to those in previous reports (Mensah, 2016;Brown et al, 2017;Machete et al, 2017). In contrast, higher body weight has been reported in naked-neck chickens compared to the other chicken strains (Njenga, 2005;Birteeb et al, 2016).…”

Section: Morphometric Traits Of Indigenous Chicken Strains In Ugandasupporting

confidence: 90%

Uganda chicken genetic resources: I. phenotypic and production characteristics

et al. 2023

View full text Add to dashboard Cite

The extent of diversity in the indigenous chicken breeds of Uganda was assessed for their potential utilisation in breeding programmes. A total of 293 indigenous-chicken-keeping households in villages across 35 districts forming 12 sub-regions of the four regions were randomly sampled for 586 mature chickens of both sexes. While only 20.8% of households were headed by women, 40.6% of indigenous chicken keepers were women. The production objectives mainly focused on chickens as sources of income from sales and household food. The chickens were predominantly managed in a scavenging (94.2%) feeding system in a mainly (96.9%) mixed crop-livestock system. The average flock size was 19.80 ± 1.21 chickens with 3.83 ± 0.29 laying hens, each producing an average of 13.41 ± 0.20 eggs/clutch and 40.3 ± 0.6 eggs/annum of 5.20 ± 0.03-month egg production age. Normal-feather strains predominated (>90%), with scattered incidences of naked neck, frizzles, polydactyl, and ptilopody traits in both sexes. Dark (49.0% hen; 43.8% cock) and white (38.3% hen; 42.4% cock) skin colours were most common among the chickens compared to yellow skin. However, yellow-coloured shanks were proportionally the most observed (41% cock; 29% hen). Orange and brown iris (eye) colours were the most common in both sexes. The hens commonly had small round earlobes with varying colours, while cocks had large oval-shaped, mainly red (70%) earlobes. The single-comb type was dominant in both sexes, with wattles almost universally present. Frizzle and polydactyl allele frequencies were significantly lower (p < 0.05) than the expected Mendelian proportions, indicating a possible state of endangerment. Meanwhile, the estimated allele frequencies of ptilopody, tufted-crest, and rose comb alleles in the population were similar (p > 0.05) to the expected Mendelian frequencies. However, these strains did not show any significant (p > 0.05) influence on the body weight or the linear morphometric estimates except for being marginally higher than the normal strains. The phenotypic correlations of body weight and morphometric traits ranged from 0.457 to 0.668 and 0.292 to 0.454 in cocks and hens, respectively. These findings provide hints about the prospects for improved performance with modifications in the production environment. The wide phenotypic diversity would support management efforts for their sustainable utilisation and preservation.

show abstract

Section: Morphometric Traits Of Indigenous Chicken Strains In Ugandasupporting

confidence: 90%