Multiple regression analysis of plant biomass yield (2010-2011) on tillering ability, plant height and days to heading using half-sib progeny means across 2010 and 2011 growing season; and stepwise variable selection methods. All variables included in the model are significant at the 0.15 level.

Table 5: Multiple regression analysis of plant biomass yield (2010-2011) on tillering ability, plant height and days to heading using half-sib progeny means across 2010 and 2011 growing season; and stepwise variable selection methods. All variables included in the model are significant at the 0.15 level.

Variables in the model	Intercept	Number of Tillers/plant	Plant height (cm)	Days to heading	Adjusted R-square
Tillering ability	-0.03^**	0.015^**	-	-	0.66
Plant height	-2.56^**	-	0.017^**	-	0.46
Heading days	-6.94^**	-		0.043^**	0.35
Tillering ability + heading days	-4.57	0.012^**		0.024^**	0.76
Tillering ability + plant height	-2.22^**	0.012^**	0.010^**	-	0.81
Tillering ability + plant height + heading days	-4.14^**	0.011^**	0.008^**	0.013^*	0.83

^*Significant at the 0.05 probability level; ^**Significant at the 0.01 probability level.