Phenetic Analysis of Cultivated Black Pepper (Piper nigrum L.) in Malaysia

Table 5

Matrix component value for all the distinguishing characteristics.

	Principle component (PC)
	1	2	3	4	5	6	7
Leaf shape	0.204	0.807	−0.101	0.029	0.078	0.402	0.043
Leaf apex	0.279	0.159	0.213	−0.455	−0.151	0.632	0.432
Leaf base	0.453	0.696	−0.107	−0.167	−0.367	0.047	0.360
Leaf area (cm^2)	0.868	0.380	0.072	−0.166	−0.080	0.039	−0.219
Leaf colour	0.167	−0.060	−0.955	−0.058	−0.172	−0.154	0.017
Blade width (cm)	0.538	0.793	−0.090	−0.150	−0.037	0.113	−0.036
Blade length (cm)	0.531	0.102	0.497	−0.056	0.485	−0.125	−0.212
Blade width-length ratio	−0.119	−0.737	0.167	0.296	0.261	−0.337	0.179
Inflorescence length (cm)	0.948	0.048	−0.126	0.154	−0.026	0.195	−0.029
Inflorescence colour	−0.011	−0.125	−0.171	−0.033	0.957	0.019	−0.150
Inflorescence thickness (mm)	−0.220	0.849	0.334	−0.191	−0.093	0.057	−0.099
Number of flowers/inflorescence	0.780	0.393	0.258	−0.233	−0.233	−0.070	−0.234
Number of inflorescences/branch	−0.621	−0.155	−0.523	0.515	0.020	−0.045	−0.220
Fruit spike length (mm)	0.923	0.150	−0.193	0.036	0.132	0.153	−0.057
Fruit size in diameter (mm)	0.848	0.189	−0.080	−0.009	0.298	0.294	−0.027
Fruit weight (single berry) (g)	0.011	0.343	−0.355	−0.689	0.300	0.035	0.277
Fruit colour (hard dough stage)	0.050	−0.048	0.932	0.219	−0.098	0.105	−0.023
Percent fruit set	−0.340	0.060	−0.196	0.103	−0.203	0.020	0.881
Conversion rate (fresh to black pepper) (%)	0.240	0.012	−0.002	0.922	0.084	−0.136	0.209
Conversion rate (fresh to white pepper) (%)	−0.189	−0.231	0.132	0.824	0.024	0.439	0.029
Pericarp thickness (mm)	0.236	0.276	0.187	0.056	0.043	0.890	−0.033
Seed diameter (mm)	0.423	0.032	0.092	0.059	0.477	0.566	−0.500
Seed weight (g)	−0.169	−0.279	0.791	−0.180	−0.246	−0.039	−0.256
Branch column types	0.122	−0.357	0.601	−0.604	−0.099	0.341	0.023
Internode length (cm)	−0.167	0.065	−0.129	0.713	−0.628	−0.076	0.019
Number of nodes/foot of the stem	−0.496	−0.789	0.177	−0.161	−0.109	0.148	−0.185
Anthocyanin	0.496	0.789	−0.177	0.161	0.109	−0.148	0.185

Note. Extraction method: principle component analysis; rotation method: varimax with Kaiser normalisation.