Amylopectin structure and crystallinity explains variation in digestion kinetics of starches across botanic sources in an in vitro pig model

Table 4 Pearson correlation coefficients for starch properties and digestion kinetics, of all analysed (non-sieved) starch samples^a

		PC1	PC2	Amylose content	Granule diameter	Crystal content	% A-type crystals	Number of pores	Side-chain length amylopectin, DP					K
		PC1	PC2	Amylose content	Granule diameter	Crystal content	% A-type crystals	Number of pores	6–12	13–24	25–36	> 36	Short:Long^b	K
PC1		X	0.00	−0.10	−0.85**	− 0.48*	0.93**	0.74**	0.85**	0.84**	0.36	−0.82**	0.86**	0.67**
PC2			X	0.91**	−0.46	0.41	−0.12	− 0.31	−0.39	− 0.43*	−0.14	0.40	−0.39	− 0.17
Amylose content				X	−0.24	0.18	−0.24	−0.36	− 0.48*	−0.45*	− 0.12	0.43	− 0.42	−0.37
Granule diameter					X	0.12	−0.74**	−0.50*	− 0.56**	−0.48*	− 0.13	0.48*	− 0.51*	−0.57**
Crystalline content						X	−0.49*	−0.31	− 0.45*	−0.56**	− 0.26	0.53*	− 0.51*	−0.25
% A-type crystals							X	0.57**	0.88**	0.84**	0.56**	−0.88**	0.86**	0.81**
Number of pores								X	0.65**	0.69**	−0.01	−0.59**	0.70**	0.33
Side chain length amylopectin, DP	6–12								X	0.93**	0.40	−0.92**	0.95**	0.81**
	13–24									X	0.49*	−0.98**	0.99**	0.60**
	25–36										X	−0.65**	0.49*	0.42
	> 36											X	−0.98**	−0.68**
	Short:long												X	0.65**
K														X

^a ** indicates a significant correlation (P ≤ 0.05), * indicates a tendency for a significant correlation (0.05 < P ≤ 0.10)
^b “Short” refers to amylopectin side-chains with DP 6–24 and “long” refers to amylopectin side-chains with DP> 36

ISSN: 2049-1891