Table 4.

Phenotypic correlations between final grain dimensions and grain dry weight accumulation

Grain filling traita	Grain length		Grain width		Grain height		Grain volume		Grain length/width		Grain length/height
	2012	2013	2012	2013	2012	2013	2012	2013	2012	2013	2012	2013
Initial GFR	0.42**	–0.05	0.26*	0.60**	0.39**	0.71**	0.45**	0.53**	0.24*	–0.34	0.04	–0.64**
Rapid GFR	0.60**	0.54**	0.35**	0.37*	0.54**	0.68**	0.65**	0.75**	0.34**	0.26	0.06	–0.07
Late GFR	0.49**	0.62**	0.26*	–0.03	0.45**	0.24	0.53**	0.43*	0.30**	0.53**	0.06	0.38*
Average GFR	0.64**	0.49**	0.38**	0.46**	0.59**	0.78**	0.71**	0.80**	0.37**	0.17	0.06	–0.20
Maximum GFR	0.59**	0.60**	0.34**	0.29	0.54**	0.61**	0.64**	0.72**	0.35**	0.35	0.06	0.05
Onset of GF	0.28*	0.40*	0.27*	–0.38*	0.26*	–0.28	0.35**	–0.06	0.07	0.53**	0.01	0.61**
GF duration	0.03	–0.02	0.20	0.12	–0.03	–0.07	0.05	–0.02	–0.12	–0.07	0.06	0.06
t max	0.19	0.29	0.37**	–0.19	0.12	–0.27	0.26*	–0.06	–0.09	0.34	0.08	0.50**

^a Trait abbreviations: GFR, grain filling rate; GF, grain filling; t _max, time at the maximum grain filling rate.

*P<0.05, **P<0.01.