Table 2. Correlation coefficients among the root and shoot traits in the F2 population.

Trait a	RV	RL	SDW	TIL	HEA
RDW	0.69***	0.43***	0.55***	0.37***	0.36***
RV		0.51***	0.56***	0.33***	0.24**
RL			0.37***	0.20*	ns
SDW				0.32***	0.25**
TIL					0.31***

^a Trait abbreviations: RDW = root dry weight (g), RV = root volume (cm³), RL = root length (cm), SDW = shoot dry weight (g), TIL = number of tillers per plant, HEA = days to heading.

*, ** and *** indicates level of significance at 5%, 1% and 0.1% levels of probability, respectively. ns = non significant.