Characteristics of Lactation Curves of the Kenya Alpine Dairy Goats in Smallholder Farms

Marete, Andrew; Mosi, R.O.; Amimo, Joshua O.; Jung'a, J.O.

doi:10.4236/ojas.2014.42013

Cited by 6 publications

(7 citation statements)

References 21 publications

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“…As for order of lactation, linear trend of increase in milk yield up to third or forth lactation and then decline toward seventh lactation was observed in both breeds, but those changes were very subtle in Serbian white goat. Similar results regarding the influence of order of lactation on dairy production in goats were obtained by Bogdanović et al (2010), Memiši et al (2011) and Marete et al (2014.…”

Section: Resultssupporting

confidence: 86%

Performance records of autochthonous goats in central Serbia

et al. 2019

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The purpose of this study was to determine status, number and present level of productivity of autochthonous goats raised in Central Serbia on smallholder farms. Study included quality breeding animals of Balkan and Serbian white goat breed registered in Central herd book. Productivity data were collected from regular annual performance recordings at 11 smallholder farms for 145 Balkan does (2-9 years of age) and 203 kids and 83 Serbian white does (2-10 years of age) and 109 kids. Traits recorded were as follows: body weight of does, body weight of kids at birth, at the age of 30 days and at weaning, prolificacy of does and milk production. The analysis showed the average body weight of does to be 43.07 kg for Balkan does and 47.42 kg for Serbian white does. Average body weight of kids at birth, 30 days of age and weaning was 2.22 kg, 6.87 kg and 15.71 kg, respectively for Balkan breed and 3.66 kg, 7.24 kg and 14.23 kg for Serbian white breed. Prolificacy was 140% in Balkan and 131% in Serbian white does. Among dairy production traits, following results were obtained for Balkan and Serbian white goat respectively: lactation length 199 and 229 days, total milk yield 257.89 kg and 459.49 kg, milk fat content 4.03% and 3.79%, milk protein content 3.06% and 3.35%. Number of quality breeding animals registered at Central herd book in 2018, as presented in Institute for Animal Husbandry?s annual report for goats for Central Serbia in 2018, was 159 for Balkan and 138 for Serbian white goat. As these breeds represent a valuable and irreplaceable source of genetic variability, as well as very important cultural and traditional heritage and further emphasis should be on preserving and increasing their number. [Project of the Serbian Ministry of Education, Science and Technological Development, Grant no. TR-31053]

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Section: Resultssupporting

confidence: 86%

Performance records of autochthonous goats in central Serbia

et al. 2019

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“…Because in G2 the value of the standard errors was lower than in G1, the lactation curve thus estimated (G2) shows a tendency to represent the typical lactation curve of dairy goats; that is, it started with a slight and gradual increase until reaching a maximum (peak), and then gradually decreased until the complete drying. A similar pattern as for the shape of the lactation curves was found by Marete et al (2014) in local goats from Kenya.…”

Section: Resultssupporting

confidence: 79%

“…The parity number had influence (P<0.05) on all curve parameters. Akpa et al (2001) reported that the parity number only affected the a parameter in Red Sokoto goats from Nigeria, and Marete et al (2014) found that the parity number had a significant effect on the parameters a and b, but not on parameter c in Kenya dairy Alpine goats. Other studies (Waheed and Sajjan-Khan, 2013) with Beetal goats in Pakistan indicated that the parity number did not affect any of the parameters of the curve.…”

Section: Resultsmentioning

confidence: 99%

“…Lactation is a biological process that can be described by means of a mathematical function (Quintero et al 2007), and graphically represents the milk production profile of a female from parity to drying off, or end of milk production (Marete et al 2014). The knowledge of lactation curves in dairy cattle is a useful tool in breeding programs, since it allows, a better selection of milk-producing females (Ángel-Marín et al 2009).…”

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Influence of milk production records on the estimation of typical and extended curve lactation parameters in local goats under grazing management

Torres-Hernández

Maldonado–Jáquez

Salinas-González

et al. 2020

Indian J of Anim Sci

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The effect of measure number of milk production (MP) on the estimation of parameters in typical and extended lactations curve parameters of local goats was evaluated. This study was conducted with 14 producers in 5 communities of the Comarca Lagunera, State of Coahuila, MÃ©xico. MP was measured monthly by hand-milking during 4 years. Data analyzed included 12,097 observations belonging to 2,229 lactations from 1,125 local goats. The Wood model was utilized to characterize the lactation curve and its parameters (a, b, and c). Two groups were formed, G1 (typical lactation with 3-7 milk measures), and G2 (extended lactations with 8-10 milk measures). The criterion utilized to determine the adequate number of MP measures during lactation was the standard error of the estimate. The best fit in the estimation of the curve parameters was obtained in G2. Factors affecting the curve parameters were also evaluated utilizing the MIXED procedure of SAS. Community, year, and parity number influenced all the parameters in both groups. Flock within community influenced b and c in G1. Season of parity influenced c in G2. It is concluded that a higher measure number of MP in an extended lactation helps in better estimation of lactation curve parameters.

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“…bras., Brasília, v.50, n.3, p.224-232, mar. 2015 DOI: 10.1590/S0100-204X2015000300006 fisiologia, ou pelo manejo e pela nutrição dos animais (Gipson & Grossman, 1990;Ruvuna et al, 1995;Macciotta et al, 2005;Marete et al, 2014). O uso de informação molecular sobre os genes que afetam a produção animal permite avaliar o potencial genético de populações com pouca informação genealógica.…”

Section: Introductionunclassified

Associação de SNPs nos genes para κ-caseína e β-lactoglobulina com curvas de lactação em cabras leiteiras

Cardona

Álvarez

Sarmento

et al. 2015

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi identificar o modelo com melhor ajuste aos dados de produção de leite, gordura, proteína e sólidos totais para cabras leiteiras, bem como associar polimorfismos de nucleotídeo único (SNPs) nos genes para κ-caseína (κ-CSN3) e β-lactoglobulina (β-LG) aos parâmetros das curvas de produção e qualidade do leite. Foram avaliados 4.160 registros de produção de leite, gordura, proteína e sólidos totais de cabras das raças Alpina, Saanen e mestiça, no Estado de Antioquia, na Colômbia. Os modelos não lineares com melhor ajuste à estrutura dos dados foram os de Nelder, para produção de leite, e de Cappio-Borlino, para qualidade do leite. As análises de associação mostraram efeito significativo do SNP κ-CSN3 sobre o pico de produção, a produção inicial e a persistência das características qualitativas do leite. Já o SNP β-LG apresentou efeito significativo sobre os picos de produção de leite e gordura, e sobre o tempo necessário para atingir o pico de produção de proteína. A identificação e a estimação da influência dos marcadores SNP avaliados sobre as curvas de lactação e a qualidade do leite podem contribuir para a seleção de caprinos leiteiros.Termos para indexação: Capra hircus, controle leiteiro, modelos não lineares, polimorfismo de nucleotídeo único, qualidade do leite, seleção assistida por marcadores. Association of SNPs in the genes for κ-casein and β-lactoglobulin with lactation curves in dairy goatsAbstract -The objective of this work was to identify the model that best fits production data of milk, fat, protein, and total solids for dairy goats, as well as to associate single-nucleotide polymorphisms (SNPs) in the genes for κ-casein (κ-CSN3) and β-lactoglobulin (β-LG) with parameters from lactation and milk-quality curves. A total of 4,160 production records of milk, fat, protein, and total solids from goats of the Alpine, Saanen, and crossbred breeds, in the state of Antioquia, Colombia, were evaluated. The nonlinear models with the best fit to data structure were Nelder's, for milk yield, and Cappio-Borlino's, for milk quality. Association analyzes showed significant effect of the SNP κ-CSN3 on production peak, initial production, and persistence of milk-quality traits. The SNP β-LG had significant effect on the peaks of milk and fat yield, and on the time required to reach the peak of protein yield. The identification and estimation of the influence of the evaluated SNP markers on lactation and milk-quality curves can contribute for dairy goat selection.

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Characteristics of Lactation Curves of the Kenya Alpine Dairy Goats in Smallholder Farms

Cited by 6 publications

References 21 publications

Performance records of autochthonous goats in central Serbia

Performance records of autochthonous goats in central Serbia

Influence of milk production records on the estimation of typical and extended curve lactation parameters in local goats under grazing management

Associação de SNPs nos genes para κ-caseína e β-lactoglobulina com curvas de lactação em cabras leiteiras

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