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Table 8 Correlation estimates of milk fat percentage on milk composition and milk FA composition

From: Comparison of milk and grass composition from grazing Irish dairy herds with and without milk fat depression

  

Correlation Estimates

Item

Entire

HMF1

MMF1

LMF1

 

(n = 94)

(n = 24)

(n = 42)

(n = 28)

 Milk Composition

 Milk protein

0.42***

0.23

0.12

-0.20

 Milk lactose

0.01

0.06

-0.07

-0.21

 Milk SCC

0.02

-0.06

-0.05

0.23

 Milk casein

0.41***

0.19

0.10

-0.25

 MUN

-0.15

-0.28

-0.28†

-0.24

 Cheddar cheese yield

0.94***

0.67***

0.78***

0.73***

Milk FA (g/kg of total FA)

 C4:0

-0.02

0.12

-0.01

-0.31

 C6:0

0.10

0.28

-0.08

-0.21

 C8:0

0.18†

0.32

0.06

-0.29

 C10:0

0.16

0.14

0.06

-0.41*

 C11:0

0.16

0.28

-0.11

-0.45*

 C12:0

0.18

0.19

0.03

-0.33†

 C13:0

0.03

0.12

-0.11

-0.37†

 C14:0

0.10

0.13

0.12

-0.33†

 C14 1c9

-0.20†

-0.2

-0.18

0.02

 C15:0

0.05

0.17

-0.08

-0.40

 C16:0

0.26*

0.42*

0.31*

-0.24

 C16 1c9

0.16

-0.14

0.13

-0.20

 C17:0

-0.09

0.05

-0.06

-0.40*

 C18:0

-0.01

-0.11

0.05

0.13

 C18 1t9

-0.32**

-0.25

-0.38*

0.04

 C18 1t11

0.003

-0.08

-0.16

0.33 †

 C18 1c9

-0.24*

-0.43*

-0.17

0.43*

 C18 1c11

-0.13

-0.46*

-0.13

0.27

 C18 2t

-0.35***

-0.29

-0.16

-0.34†

 C18:2c 9, 12

-0.41***

-0.43*

-0.21

0.33†

 C18:3c 6,9,12

-0.22*

-0.29

-0.25

0.23

 C18:3c 9,12,15

-0.13

-0.15

-0.34*

0.13

 CLA c9, t11

-0.13

-0.15

-0.21

0.22

 CLA t10, c12

0.06

0.07

-0.12

0.30

 C20:0

-0.16

-0.01

0.11

0.04

 C20:1c 11

-0.30**

-0.29

0.01

0.10

 C20:2c 11,14

-0.15

-0.51*

-0.24

0.38*

 C20:3c 8,11,14

-0.49****

-0.46*

-0.35*

-0.01

 C20:3c 11,14,17

0.18†

-0.01

-0.07

0.58**

 C20:4c 5,8,11,14

-0.44***

-0.49*

-0.34*

0.16

 C20:5c 5,8,11,14,17

0.01

-0.07

0.13

-0.12

 C21:0

-0.35***

-0.09

-0.06

0.12

 C22:0

0.03

-0.28

0.15

0.26

 C22:1c 13

0.10

0.15

0.04

0.28

 C22:2c 13,16

-0.11

-0.29

-0.31*

-0.04

 C22:5c 7,10,13,16,19

-0.21*

-0.50*

-0.26

0.02

 C22:6c 4,7,10,13,16,19

0.14

0.04

-0.22

0.24

 C23:0

-0.04

-0.28

0.06

0.13

 C24:0

-0.07

-0.21

0.24

0.24

 C24:1c 15

0.16

0.07

-0.18

0.20

Total Saturated FA

0.28**

0.46*

0.26†

-0.40*

Total MUFA

-0.24*

-0.47*

-0.17

0.40*

Total PUFA

-0.39***

-0.48*

-0.28†

0.39*

Total Omega-3 FA

-0.11

-0.22

-0.36*

0.05

Total Omega-6 FA

-0.43***

-0.49*

-0.25

0.35†

Total Omega-7 FA

0.10

-0.31

0.05

-0.08

Total Omega-9 FA

-0.24*

-0.43*

-0.17

0.43*

Ratio Omega-3: Omega-6

0.41***

0.36†

0.14

-0.06

Ratio Omega-6: Omega-3

-0.38***

-0.32

-0.18

0.08

Total CLA

-0.13

-0.14

-0.21

0.31

2 Total de-novo FA

0.10

0.13

0.04

-0.41*

  1. 1HMF (> 3.95% milk fat) = High milk fat herds, MMF (3.31 – 3.94% milk fat) = Medium milk fat herds, LMF = Low milk fat herds (< 3.30% milk fat)
  2. 2Total de-novo FA = sum of FA from C4 to C15:0 inclusive
  3. †P < 0.10; * P < 0.05; ** P < 0.01; *** P < 0.001