Genome-wide identification of mitogen-activated protein kinase gene family in Gossypium raimondii and the function of their corresponding orthologs in tetraploid cultivated cotton

Table 2 Pearson correlation coefficients of the expression profiles of paralogous pairs

Gene1	Gene2	Similarity	Correlation coefficient*	Correlation coefficient	Correlation coefficient
			(organs)	(hormone)	(abiotic stress)
MPK2	MPK7	86.73%	0.24	0.40	0.26
MPK5	MPK14	93.28%	−0.04	0.63	0.27
MPK8	MPK14	84.51%	0.86	0.60	0.10
MPK8	MPK20	93.48%	0.34	0.51	0.56
MPK8	MPK23	91.85%	0.15	0.89	0.84
MPK8	MPK25	85.87%	−0.39	0.26	0.69
MPK9	MPK13	92.27%	−0.46	0.71	0.73
MPK10	MPK27	90.37%	−0.15	0.83	−0.03
MPK10	MPK16	86.63%	0.03	0.66	−0.06
MPK14	MPK25	80.65%	−0.30	0.14	0.07
MPK16	MPK27	84.96%	−0.26	0.83	0.64
MPK20	MPK23	92.39%	−0.49	0.33	0.67
MPK20	MPK25	86.96%	−0.61	−0.06	0.53
MPK22	MPK28	77.28%	−0.09	−0.07	0.23

*Correlation coefficient: r > 0.5: positive correlation, showed in bold type; 0 < r < 0.5: no clear positive correlation; −0.5 < r < 0: no clear negative correlation; r < −0.5: negative correlation.