Effects of supplemental methionine sources in finishing pig diets on carcass characteristics, cutting yields, and meat quality

Remole, Hannah

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https://hdl.handle.net/2142/117837 Copy

Description

Title

Effects of supplemental methionine sources in finishing pig diets on carcass characteristics, cutting yields, and meat quality

Author(s)

Remole, Hannah

Issue Date

2022-12-09

Director of Research (if dissertation) or Advisor (if thesis)

Harsh, Bailey

Committee Member(s)

• Dilger, Ryan
• Dilger, Anna

Department of Study

Animal Sciences

Discipline

Animal Sciences

Degree Granting Institution

University of Illinois at Urbana-Champaign

Degree Name

M.S.

Degree Level

Thesis

Keyword(s)

Carcass composition, meat quality, methionine, pork, sulfur amino acid, swine nutrition

Abstract

While supplemental methionine (Met) is widely used within the swine industry, data are limited regarding the effect of Met sources on carcass cutability and meat quality. The objective was to determine the effects of L-Met (LM, 99%), DL-Met (DLM, 99%), or calcium salt of DL-Met hydroxyl analogue (MHA, 84%) in finishing pig diets on carcass characteristics and meat quality. At d 66 of age, pigs (N = 240) were allocated to 60 single-sex pens for a four phase feeding system that lasted 104 days. On d56 pens were randomly allotted to one of three experimental diets for 48 day with a phase change at d83. For the final 7 wk of the finisher phase, pigs (BW= 79.9 ± 0.80 kg) were fed diets containing LM, DLM, or MHA, with the supplemental Met source providing 25% of standardized ileal digestible (SID) Met + cysteine (Cys) requirement. One pig per pen was slaughtered at study conclusion, and left sides of carcasses were fabricated into subprimal cuts to determine carcass-cutting yields. Loin quality including proximate composition and shear force was measured. Data were analyzed using the MIXED procedure of SAS. Hot carcass weight was not different (P = 0.34) between treatments (LM 104.5 kg; DLM 103.0 kg; MHA 101.5kg), moreover loin eye area was not different (P = 0.98) between treatments (LM 52.65 cm²; DLM 52.49 cm²; MHA 52.81 cm²). Boneless carcass cutting yield was not different (P = 0.56) between treatments (LM 54.97 kg; DLM 54.82 kg; MHA 54.52 kg). Loin pH was not different (P = 0.24) between treatments (LM 5.45; DLM 5.48; MHA 5.45). However, drip loss tended to be reduced (P = 0.11) by the DLM treatment (5.58%) compared with LM (7.03%) and MHA (6.68%) treatments. Shear force was not different (P = 0.85) between treatments (LM 3.03 kg; DLM 3.06 kg; MHA 3.10 kg). However, cook loss tended to be reduced (P = 0.06) by the DLM treatment (16.20%) compared with LM (18.18%) and MHA (18.50%) treatments. These data suggest that only minimal differences in carcass cutability and meat quality can be attributed to Met source in finishing pig diets.

Graduation Semester

2022-12

Type of Resource

Thesis

Copyright and License Information

Copyright 2022 Hannah Remole

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