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Table 3 Effect of genotype, lactation stage and interaction between genotype and lactation stage on selected classes of fatty acid, ratios and atherogenicity index of milk from free-ranging indigenous goats

From: Comparative fatty-acid profile and atherogenicity index of milk from free grazing Nguni, Boer and non-descript goats in South Africa

Fatty acid ratios

Genotype

Lactation

P value

Nguni (10)

Boer (10)

Non-descript (10)

Early

Late

G

L

G × L

Total saturated fatty acids (SFA)

68.65c ± 1.08

73.77a ± 1.73

71.73ab ± 1.27

68.62b ± 1.14

74.14a ± 1.12

0.0319

0.0011

0.2455

Total monounsaturated fatty acids (MUFA)

27.92a ± 1.07

22.90bc ± 1.72

23.90b ± 1.25

27.51a ± 1.13

22.31b ± 1.11

0.0159

0.0019

0.1958

Total polyunsaturated fatty acids (PUFA)

3.41b ± 0.14

3.31bc ± 0.23

4.35a ± 0.17

3.86a ± 0.15

3.53a ± 0.15

0.0001

0.1392

0.0626

Total omega-6 fatty acids (n-6)

2.19b ± 0.09

2.13bc ± 0.14

2.82a ± 0.10

2.46a ± 0.09

2.30a ± 0.09

0.0001

0.2214

0.2725

Total omega-3 fatty acids (n-3)

1.22b ± 0.07

1.19bc ± 0.11

1.53a ± 0.08

1.39a ± 0.07

1.23a ± 0.07

0.0117

0.1448

0.0110

PUFA/SFA

0.05b ± 0.002

0.04bc ± 0.003

0.06a ± 0.002

0.05a ± 0.002

0.04b ± 0.002

0.0059

0.0337

0.1032

n-6/n-3

1.91a ± 0.07

1.83a ± 0.12

1.94a ± 0.09

1.94a ± 0.08

1.94a ± 0.08

0.7753

0.4989

0.0075

Atherogenicity index

2.34a ± 0.17

2.60a ± 0.027

2.35a ± 0.20

2.39a ± 0.17

2.39a ± 0.17

0.7025

0.7050

0.2118

  1. Mean (± S.E.) values within rows with different superscripts differ significantly (P < 0.05) between genotypes and lactation stages
  2. S.E. standard error