Table 4 Eigenvalue and contributive percentage of principal components and component scores coefficient matrix of the 15 phenotypic traits
Traits code | First principal component | Second principal component | Third principal component | Fourth principal component |
|---|---|---|---|---|
The period from seeding to heading(d) | 0.155 | 0.052 | -0.212 | 0.135 |
Plant heights (cm) | 0.165 | 0.029 | -0.138 | 0.106 |
Leaf length (cm) | 0.108 | -0.098 | 0.188 | 0.130 |
Leaf width (cm) | 0.159 | -0.038 | -0.091 | 0.156 |
Average single plant valid spike number | -0.136 | 0.155 | 0.050 | 0.020 |
Spike lengths (cm) | 0.167 | -0.066 | -0.083 | 0.081 |
Kernel numbers per spike | 0.155 | -0.136 | 0.262 | -0.151 |
Grain number | 0.152 | -0.141 | 0.264 | -0.137 |
1000-seed weights (g) | 0.001 | 0.002 | -0.224 | 0.565 |
Brown rice rate (100%) | -0.007 | 0.071 | 0.305 | 0.267 |
Milled rice rate (100%) | 0.023 | 0.244 | 0.279 | 0.232 |
Head rice rate (100%) | 0.030 | 0.195 | 0.272 | 0.194 |
Chalky rice rate | -0.121 | -0.242 | 0.099 | 0.244 |
Chalkiness | -0.110 | -0.248 | 0.077 | 0.142 |
Length-width ratio | 0.043 | 0.252 | -0.039 | -0.194 |
Eigenvalue | 4.729 | 2.721 | 1.763 | 1.391 |
Contributive percentage (%) | 31.527 | 18.137 | 11.756 | 9.272 |
Cumulative contributive percentage (%) | 31.527 | 49.665 | 61.420 | 70.693 |