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Population structure and phenotypic characterization as a basis for conservation and sustainable use of Reyna Creole Cattle in Nicaragua

Corrales, Roldan (2011). Population structure and phenotypic characterization as a basis for conservation and sustainable use of Reyna Creole Cattle in Nicaragua. Diss. (sammanfattning/summary) Uppsala, Sweden : Sveriges lantbruksuniv., Acta Universitatis agriculturae Sueciae, 1652-6880 ; 2011:47
ISBN 978-91-576-7591-0
[Doctoral thesis]

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Abstract

The Reyna Creole cattle in Nicaragua is a local breed originating from the Bos taurus cattle brought to Latin America during the Spanish colonization in the fifteenth century. Reyna Creole cattle are today found in five herds. The primary use of the breed is to produce milk. The breed comprises about 650 purebred female animals. The main objective of the thesis was to characterize the population structure and productivity in terms of milk production and some reproduction traits, and to discuss options for conservation and improvement of the breed.

The inbreeding level was 13% on average, primarily due to use of individual bulls for long periods. An effective population size of 28 to 46 animals was estimated, showing that the Reyna Creole cattle breed is endangered, close to critical status.

Average birth weight was 27.8 kg, age at first calving 37.4 months and calving interval 14.0 months. Large differences between herds were observed for all traits. Heritabilities were 0.34, zero and 0.20 for the respective trait. Average lactation yield for 534 Reyna cows with 1,750 lactations was 1,319 kg with large variations between herds and time periods. Test-day records on milk yield and fat and protein contents were collected monthly during one year for three Reyna herds and two herds with crossbred cows. Commercial dairy breed crosses had the highest production, and Reyna the lowest, but large differences were noted in management between the herds. The heritability for lactation yield in Reyna cattle was 0.18.

Large variation between and within the Reyna herds suggest good opportunities to increase productivity of the Reyna breed by improving management and breeding strategies. It is proposed to keep all females in the herds, develop mating plans and to apply a recording scheme for keeping pedigrees and records on reproduction and milk production traits. Only young bulls, selected from the best cows for milk production and calving interval, are proposed to be used for 1-2 years each to manage inbreeding and keep generation intervals short.

Authors/Creators:Corrales, Roldan
Title:Population structure and phenotypic characterization as a basis for conservation and sustainable use of Reyna Creole Cattle in Nicaragua
Series/Journal:Acta Universitatis agriculturae Sueciae (1652-6880)
Year of publishing :8 June 2011
Volume:2011:47
Number of Pages:51
Papers/manuscripts:
NumberReferences
I.Corrales, R., Näsholm, A., Malmfors, B. and Philipsson, J. (2010). Population structure of Reyna Creole cattle in Nicaragua. Tropical Animal Health and Production, 42(7), 1427 - 1434.
II.Corrales, R., Näsholm, A., Malmfors, B. and Philipsson, J. (2011). Birth weight, reproduction traits and effects of inbreeding in Nicaraguan Reyna Creole cattle. Tropical Animal Health and Production, in press, doi 10.1007/s11250-011-9814-4.
III.Corrales, R., Lunden, A., Näsholm, A., Malmfors, B. and Philipsson, J. (2011). Milk production in Reyna Creole cattle and some breed crosses in Nicaragua. (manuscript).
Place of Publication:Uppsala, Sweden
Publisher:Institutionen för husdjursgenetik, Sveriges lantbruksuniversitet
ISBN for printed version:978-91-576-7591-0
ISSN:1652-6880
Language:English
Additional Information:summary in spanish
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:L Animal production > L10 Animal genetics and breeding
Subjects:Obsolete subject words > FORESTRY, AGRICULTURAL SCIENCES and LANDSCAPE PLANNING > Animal production > Animal breeding
Agrovoc terms:cattle, animal population, animal breeding, reproductive performance, milk production, heritability, endangered species, nicaragua
Keywords:Inbreeding, Effective population size, Endangered, Birth weight, Calving age, Calving interval, Milk production, Heritability, Repeatibility
URN:NBN:urn:nbn:se:slu:epsilon-e-107
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-107
ID Code:8147
Department:(VH) > Dept. of Animal Breeding and Genetics
External funders:Swedish International Development Cooperation Agency
Deposited By: Roldan Corrales
Deposited On:24 May 2011 10:20
Metadata Last Modified:02 Dec 2014 10:46

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