The Correlation between Feed Efficiency and Rate of Gain, a Ratio and Its Denominator

Sutherland, T. M.

doi:10.2307/2528555

Cited by 74 publications

(43 citation statements)

References 7 publications

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“…Selection for growth rate or live weight would be expected to increase feed intake as well as to improve feed conversion ratio (Turner, 1959;Sutherland, 1965). These estimates agree with previous estimates of genetic correlation for postweaning ADG with feed conversion ratio (feed/gain) of −0.43 for Rambouillet and −1.00 for Romnelet (Vesely et al, 1970) and 0.80 for postweaning ADG with total feed intake for crossbred lambs (Leymaster et al, 2002).…”

Section: Resultssupporting

confidence: 85%

Estimates of genetic parameters and selection strategies to improve the economic efficiency of postweaning growth in lambs1

Snowder

Vleck

2003

Journal of Animal Science

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ABSTRACT:The objectives of this study were to estimate (co)variance components for growth and feed efficiency measures, and to compare selection strategies to improve economic efficiency of gain. Variance components for pre-and postweaning growth, body weight, and measures of feed efficiency were estimated from data collected on 1,047 Targhee lambs over 7 yr. Approximately 21 d after weaning, lambs were group-fed for 4 wk, with ad libitum access to a diet of 37% whole barley grain and 63% pelleted alfalfa hay. Lambs were then individually fed for 6 wk. Lambs were then returned to group feeding for another 4-wk period. The mean feed conversion ratio (gain/intake) for the individual feeding period was 0.11. Mean postweaning ADG for the total 14-wk feeding period was 0.26 kg. (Co)variance components were estimated from single-and two-trait animal models using REML. The selection strategies compared included direct selection, index selection, and restricted index selection. Estimates of (co)variances derived from single-and two-trait models were similar,

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Section: Resultssupporting

confidence: 85%

Estimates of genetic parameters and selection strategies to improve the economic efficiency of postweaning growth in lambs1

Snowder

Vleck

2003

Journal of Animal Science

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“…SA51 significantly reduced feed efficiency, which is the ratio of feed consumed to live-weight gain in a given period ( Figure 4). 12 Significantly improvement was also observed in the serum concentrations of triglycerides, total cholesterol, and non-esterified fatty acids (NEFAs) ( Table 2).…”

Section: Resultsmentioning

confidence: 93%

Inhibition of IκB Kinase β (IKKβ) and Anti-diabetic Effect of SA51

Bhattarai¹,

Kafle²,

Hwang³

et al. 2013

Bulletin of the Korean Chemical Society

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SA51, a medium potency inhibitor of protein tyrosine phosphatase 1B (PTP1B), was identified to be a potent inhibitor of IκB kinase β (IKKβ). Consistent with this, SA51 prevented lipopolysaccharide (LPS)-induced breakdown of IκBα in macrophages. The effects of SA51 in mice were compared with those of structurally related compounds, SA18 and SA32, which were previously reported as inhibitors of both enzymes -less potent against IKKβ but more potent against PTP1B compared to SA51. SA51 improved glucose tolerance and lipid parameters in mice, consistent with the results reported for IKKβ +/− mice. In contrast, SA18 and SA32 showed anti-obesity effects without anti-diabetic effects. Collectively, the effects of SA51 could be due largely to the inhibition of IKKβ, whereas SA18 and SA32 may be more likely to inhibit PTP1B, consistent with their relative in vitro inhibitory effects.

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“…Selec-tion for feed efficiency in broilers has met with some success (Guill and Washburn 1974; Pym and Nicholls 1979) and has been found to be heritable across species 1fi2:0.37 for chickens (Chambers and Gavora 1982); h':0.42 for beef (Simm 1983)). However, use of the feed:gain ratio as a measure of feed efficiency has to be carefully considered, specifically: (i) the existence of a part-whole correlation between a ratio and either its numerator or denominator imparts some concerns (Turner 1959;Sutherland 1965) (Belsley et al 1980), the D influence staristic (Cook 1977), residual analysis, and power transformations (Box and Cox 1964) For personal use only. …”

mentioning

confidence: 99%

Alternative Selection Criteria for the Genetic Improvement of Feed Efficiency in Broiler Chickens

Irwin¹,

Friars²,

Julian³

1988

Can. J. Anim. Sci.

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The Correlation between Feed Efficiency and Rate of Gain, a Ratio and Its Denominator

Cited by 74 publications

References 7 publications

Estimates of genetic parameters and selection strategies to improve the economic efficiency of postweaning growth in lambs1

Estimates of genetic parameters and selection strategies to improve the economic efficiency of postweaning growth in lambs1

Inhibition of IκB Kinase β (IKKβ) and Anti-diabetic Effect of SA51

Alternative Selection Criteria for the Genetic Improvement of Feed Efficiency in Broiler Chickens

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