Genetic diversity and population structure of 93 rice cultivars (lines) (Oryza sativa Xian group) in Qinba in China by 3 types of genetic markers

Table 3 Pearson correlation coefficient analysis of the 15 phenotypic traits

Traits	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15
1	1
2	0.726^**	1
3	0.224^*	0.249^*	1
4	0.567^**	0.582^**	.261^*	1
5	-0.358^**	-0.398^**	-0.394^**	-0.564^**	1
6	0.574^**	0.634^**	0.398^**	0.571^**	-0.469^**	1
7	0.268^**	0.391^**	0.509^**	0.460^**	-0.520^**	0.554^**	1
8	0.260^*	0.393^**	0.501^**	0.428^**	-0.519^**	0.545^**	0.984^**	1
9	0.179	0.111	0.074	0.159	-0.024	0.147	-0.272^**	-0.250^*	1
10	-0.107	-0.130	0.098	-0.013	0.156	-0.116	0.085	0.067	0.078	1
11	0.053	0.095	0.049	0.014	0.222^*	-0.037	-0.014	-0.022	0.012	0.336^**	1
12	0.076	0.125	0.058	0.055	0.115	-0.054	0.031	0.065	-0.045	0.155	0.680^**	1
13	-0.491^**	-0.414^**	-0.053	-0.322^**	0.152	-0.268^**	-0.158	-0.140	0.145	0.077	-0.239^*	-0.270^**	1
14	-0.466^**	0.353^**	-0.017	-0.301^**	0.116	-0.240^*	-0.116	-0.099	0.036	-0.143	-0.295^**	-0.208^*	0.891^**	1
15	0.095	0.171	0.005	-0.015	0.156	0.104	-0.047	-0.084	-0.042	0.001	0.360^**	0.134	-0.604^**	-0.518^**	1

Note: Asterisk indicates significant difference between phenotypic traits using two-tailed t-tests. *P<0.05; **P<0.01
Principal components were extracted based on the criterion that the eigenvalue was greater than 1.0. The eigenvalues of the first four PCs in 15 phenotypic traits were greater than 1.0, and together accounted for 70.693% of the phenotypic variation (Table 4). The first PC accounted for 31.527%; the most important traits were spike lengths (0.167), plant heights (0.165) and leaf width (0.159). The second PC accounted for 18.137%, the most important traits being length-width ratio (0.252), milled rice rate (0.244) and head rice rate (0.195)

ISSN: 1471-2164