Grain iron and zinc density in pearl millet: combining ability, heterosis and association with grain yield and grain size

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Table 6 Correlation coefficient among traits in hybrids (above diagonal) and parents (below diagonal)

Trait^a	Fe (mg kg^-1)	Zn (mg kg^-1)	GY (t ha^-1)	GW(g)
Fe	1	0.88^ (0.71^)	-0.29^** (-0.13^NS)	0.42^** (0.003^NS)
Zn	0.88^ (0.91^)^b	1	-0.26^** (-0.14^NS)	0.43 ^**(-0.02^NS)
GY	-0.11^NS (-0.41^*)	-0.18^NS (-0.35^NS)	1	-0.05^NS (0.21^**)
GW	0.11 ^NS(0.51^**)	0.002 ^NS (0.54^**)	0.58^** (-0.21^NS)	1

^aGrain iron (Fe) and zinc (Zn) density, 1000-grain weight (GW) and grain yield (GY); ^bValues outside the parentheses are phenotypic correlations for performance per se and values within the parentheses are correlations between GCA effects in parents and between SCA effects in hybrids; ^*,**Significant at the 0.05 and 0.01 probability level, respectively; ^NSNon-significant.