Table 2 Definition of traits^a

Acronym

Definition

Unit

CW

Carcass weight (weight of carcass with kidneys, 24 h after slaughter, cold)

kg

AFW

Abdominal fat weight

kg

HEFW

Ham external fat weight

kg

SEFW

Shoulder external fat weight

kg

BFW

Back fat weight (loin and neck external fat weight)

kg

FCP

Fat cuts (weight of external fat from ham, shoulder, loin, neck as well as abdominal fat, as proportion of carcass weight)

%

BFML

Back fat depth on M. long. dorsi at 13^th/14^th rib (average of three measurements at three points, lateral to the cutting line of chops)

mm

FD10

Fat depth at 10^th rib (depth of fat and skin on muscle, average of three measurements, at thinnest point)

mm

ABFD

Average back fat depth (mean value of shoulder fat depth, fat depth at about 10^th rib and loin fat depth)

mm

FAML

Fat area on M. long. dorsi at 13^th/14^th rib (back fat area according to [40])

cm²

FMR

Fat to meat ratio (fat area in relation to meat area at 13^th/14^th rib)

b) Enzyme activity and protein content measured from fat tissue

Acronym

Definition

Unit

MDHO

Activity of NADP-malate dehydrogenase, outer back fat layer

units/g tissue

PCO

Protein content, outer back fat layer

mg/g tissue

LGSEO

Logarithm of activity of NADPH generating enzymes, outer back fat layer(transformed for normal distribution of the trait)

lg₁₀ (units/g tissue * 1000)

MDHI

Activity of NADP-malate dehydrogenase, inner back fat layer

units/g tissue

PCI

Protein content, inner back fat layer

mg/g tissue

LGSEI

Logarithm of activity of NADPH generating enzymes, inner back fat layer(transformed for normal distribution of the trait)

lg₁₀ (units/g tissue * 1000)

MDHOI

Activity of NADP-malate dehydrogenase, averaged outer and inner back fat layer

units/g tissue

PCOI

Protein content, averaged outer and inner back fat layer

mg/g tissue

LGSEOI

Logarithm of activity of NADPH generating enzymes (ICDH + MDH + 6PGDH + G6PDH), averaged outer and inner back fat layer (transformed for normal distribution of the trait)

lg₁₀ (units/g tissue * 1000)

c) Relative numbers and volumes of fat cells with different diameters

Acronym

Definition

Unit

FN73

Relative number of fat cells in the class of about 73 μm diameter

%

FN92

Relative number of fat cells in the class of about 92 μm diameter

%

FN114

Relative number of fat cells in the class of about 114 μm diameter

%

FN146

Relative number of fat cells in the class of about 146 μm diameter

%

FN183

Relative number of fat cells in the class of about 183 μm diameter

%

FNCM

Relative number of fat cells with medium cell sizes (FN73 + FN92 + FN114)

%

FNCL

Relative number of fat cells with large cell sizes (FN146 + FN183 + FN228).FN228 is not included as separate trait.

%

RFNCSL

Ratio of FNCS/FNCL (FN23 + FN29 + FN36 + FN41 + FN57)/(FN146 + FN183 + FN228). FNCS (small cell sizes) is not included as separate trait.

RFNCML

Ratio of FNCM/FNCL (FN73 + FN92 + FN114)/(FN146 + FN183 + FN228)

RFNCLO

Ratio of FNCL/(FNCS + FNCM)(FN146 + FN183 + FN228)/(FN23 + FN29 + ... + FN114)

FV73

Relative volume of fat cells in the class of about 73 μm diameter

%

FV92

Relative volume of fat cells in the class of about 92 μm diameter

%

FV114

Relative volume of fat cells in the class of about 114 μm diameter

%

FV146

Relative volume of fat cells in the class of about 146 μm diameter

%

FV183

Relative volume of fat cells in the class of about 183 μm diameter

%

FVCM

Relative volume of fat cells with medium cell sizes (FV73 + FV92 + FV114)

%

FVCL

Relative volume of fat cells with large cell sizes (FV146 + FV183 + FV228).FV228 is not included as separate trait.

%

RFVCSL

Ratio of FVCS/FVCL (FV23 + FV29 + ... + FV57)/(FV146 + FV183 + FV228). FVCS (small cell sizes) is not included as separate trait.

RFVCML

Ratio of FVCM/FVCL(FV73 + FV92 + FV114)/(FV146 + FV183 + FV228)

RFVCLO

Ratio of FVCL/(FVCS + FVCM)(FV146 + FV183 + FV228)/(FV23 + FV29 + ... + FV114)