Campus Units

Animal Science

Document Type

Article

Publication Version

Published Version

Publication Date

9-29-2020

Journal or Book Title

BMC Veterinary Research

Volume

16

First Page

360

DOI

10.1186/s12917-020-02541-x

Abstract

Background Free-range local chickens (FRLC) farming is an important activity in Tanzania, however, they have not been well-characterized. This study aimed to phenotypically characterize three Tanzanian FRLCs and to determine their population structure. A total of 389 mature breeder chickens (324 females and 65 males) from three popular Tanzanian FRLC ecotypes (Kuchi, Morogoro-medium and Ching’wekwe) were used for the phenotypic characterization. Progenies of these chickens were utilized to assess population structure. The ecotypes were collected from four geographical zones across Tanzania: Lake, Central, Northern and Coastal zones. Body weights and linear measurements were obtained from the mature breeders, including body, neck, shanks, wingspan, chest girth, and shank girth. Descriptive statistics were utilized to characterize the chickens. Correlations between the linear measurements and differences among the means of measured linear traits between ecotypes and between sexes were assessed. A total of 1399 progeny chicks were genotyped using a chicken 600 K high density single nucleotide polymorphism (SNP) panel for determination of population structure.

Results The means for most traits were significantly higher in Kuchi relative to Ching’wekwe and Morogoro-medium. However, shank length and shank girth were similar between Kuchi and Morogoro-medium females. All traits were correlated with the exception of shank girth in Morogoro-medium. Admixture analyses revealed that Morogoro-medium and Ching’wekwe clustered together as one population, separate from Kuchi.

Conclusions Phenotypic traits could be used to characterize FRLCs, however, there were variations in traits among individuals within ecotypes; therefore, complementary genomic methods should be considered to improve the characterization for selective breeding.

Comments

This article is published as Mushi, James R., Gaspar H. Chiwanga, Esinam N. Amuzu-Aweh, Muhammed Walugembe, Robert A. Max, Susan J. Lamont, Terra R. Kelly, Esther L. Mollel, Peter L. Msoffe, Jack Dekkers, Rodrigo Gallardo, Huaijun Zhou, and Amandus P. Muhairwa. "Phenotypic variability and population structure analysis of Tanzanian free-range local chickens." BMC Veterinary Research 16 (2020): 360. DOI: 10.1186/s12917-020-02541-x. Posted with permission.

Creative Commons License

Creative Commons Attribution 4.0 License
This work is licensed under a Creative Commons Attribution 4.0 License.

Copyright Owner

The Author(s)

Language

en

File Format

application/pdf

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