Table 2  Spearman’s rank correlation coefficients between hybrid sterility phenotypes
Relative right testisSperm densitySperm head PC1Sperm head PC2Seminiferous tubule areaProximal bent tailDistal bent tailHeadless/taillessAmorphous headTotal abnormal
Relative right testis0.370.01−0.180.40−0.18−0.14−0.25−0.21−0.26
Sperm density<0.0010.18−0.180.24−0.210.10−0.14−0.28−0.24
Sperm head PC10.8500.00200.18−0.45-0.29−0.32−0.42−0.51
Sperm head PC20.0020.00210.110.050.120.050.080.06
Seminiferous tubule area<0.001<0.0010.0020.069−0.17−0.19−0.22−0.19−0.26
Proximal bent tail0.002<0.001<0.0010.3580.0030.360.270.440.66
Distal bent tail0.0190.070<0.0010.0370.001<0.0010.300.310.55
Headless/tailless<0.0010.013<0.0010.412<0.001<0.001<0.0010.330.80
Amorphous head<0.001<0.001<0.0010.1810.001<0.001<0.001<0.0010.61
Total abnormal<0.001<0.001<0.0010.147<0.001<0.001<0.001<0.001<0.001
  • Upper diagonal: Spearman’s ρ with significant correlations in boldface type. Lower diagonal: P values.