High rumen degradable starch decreased goat milk fat via trans-10, cis-12 conjugated linoleic acid-mediated downregulation of lipogenesis genes, particularly, INSIG1

Table 1 Lactation performance of dairy goats fed diets with different RDS contents

Item	Treatment^c			SEM^d	P-value
Item	LRDS	MRDS	HRDS	SEM^d	P-value
DMI, kg/d	2.0	2.1	2.1	0.02	0.68
Milk yield, kg/d	1.4	1.7	1.2	0.11	0.09
FPCM^e, kg/d	1.4	1.5	1.0	0.09	0.06
Milk composition, %
Fat	3.74^a	3.06^b	3.01^b	0.11	<0.01
Protein	2.95	3.04	2.98	0.06	0.85
Lactose	4.70	4.57	4.57	0.06	0.58
MUN, mg/dL	31.47	30.05	30.40	1.21	0.89
SCC, 10³/mL	392^b	640^b	2271^a	339	0.04
Milk composition yield, g/d
Fat	53.6^a	52.7^a	32.1^b	3.5	<0.01
Protein	44.8^ab	51.5^a	35.2^b	2.7	0.03
Lactose	73.0	79.0	53.9	4.6	0.06
Efficiency, kg/kg
Milk/DMI	0.71	0.82	0.57	0.05	0.11
FPCM/DMI	0.67	0.71	0.50	0.04	0.07

^a-b Means within the same row with different superscripts differ significantly (P < 0.05)
^cTreatments were the LRDS diet (RDS = 20.52%), MRDS diet (RDS = 22.15%), and HRDS diet (RDS = 24.88%) with similar total starch contents
^dSEM Standard error of mean
^eFPCM fat-and protein-corrected milk yield

ISSN: 2049-1891