Variations of early postmortem pH in carcasses of grass-fed steers and its relationship with glycolytic potential and meat quality traits

This study aimed to investigate the multivariate relationship between the glycolytic potential, and meat quality traits from grass-fed steers carcasses with variations in early postmortem pH. From a contemporary group of steers (n=70) from the same production unit and slaughtered under similar condi...

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Bibliographic Details
Published in:	Agricultural and food science Vol. 31; no. 4
Main Authors:	Jerez-Timaure, Nancy, Brinckmann, Gaspar, Berkhoff, Maureen, Ramírez-Reveco, Alfredo, Strobel, Pablo
Format:	Journal Article
Language:	English
Published:	Scientific Agricultural Society of Finland 31-12-2022
Subjects:	beef, color, tenderness, lactate, glycogen, glucose
Online Access:	Get full text
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Summary:	This study aimed to investigate the multivariate relationship between the glycolytic potential, and meat quality traits from grass-fed steers carcasses with variations in early postmortem pH. From a contemporary group of steers (n=70) from the same production unit and slaughtered under similar conditions, thirty carcasses (10/group) were selected based on pH values measured at 3h (pH3h): Low (< 6.2), Intermediate pH3h (6.2–6.5), and High (> 6.5). Carcasses segregated by pH3h groups were different (p < 0.05) in muscular glycogen (MCG), glucose (G+G6P) content, glycolytic potential (GP) and GPstrict (GP without lactate content). The interaction pH3h groups × sampling time was significant only for lactate content (LC) (p < 0.05). Quality traits, except redness, did not vary (p > 0.05) among pH3h groups. Color variables had a positive and moderate correlation with MGC, G+G6P, LC, and GP. Results does not allow to recommend early carcass segregation by very early pH (3h postmortem); however, important bivariate and multivariate relationships between G+G6P, lactate content and instrumental color parameters in LL muscle from grass-fed cattle were demonstrated.
ISSN:	1459-6067 1795-1895
DOI:	10.23986/afsci.121501