Evaluation of drought-tolerant sunflower (Helianthus annuus L.) hybrids in autumn and spring planting under semi-arid rainfed conditions | OCL

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Table 5

Pearson correlation coefficients among various morphological and phenological traits.

Parameters	Seed yield	DTFI	RDD	WUE	RDD/TDD	HD	DTM	GDF
Autumn season
Days to flower initiation (DTFI)	−0.04^NS
Reproductive degree days to maturity (RDD)	0.34^NS	−0.42^*
Water use efficiency (WUE)	0.87^**	−0.45^*	0.37^NS
RDD/TDD	−0.03^NS	−0.71^**	0.60^**	0.20^NS
Head diameter (HD)	0.53^*	−0.11^NS	−0.24^NS	0.62^*	−0.17^NS
Days to maturity (DTM)	0.20^NS	0.62^**	−0.27^NS	−0.20^NS	−0.33^NS	−0.07^NS
Growing degree days to flowering (GDF)	0.35^NS	0.58^**	0.08^NS	−0.06^NS	−0.75^**	0.11^NS	0.32^NS
Leaf area (LA)	−0.38^NS	0.94^*	−0.33^NS	−0.53^*	−0.77^**	−0.25^NS	0.51^*	0.51^*
Spring season
Days to flower initiation	0.10^NS
Reproductive degree days to maturity	−0.37^NS	−0.66^**
Water use efficiency	0.91^**	0.20^NS	−0.39^NS
RDD/TDD	−0.41^*	−0.90^**	0.84^**	−0.19^NS
Head diameter	0.81^**	0.27^NS	−0.43^*	0.80^*	−0.39^NS
Days to maturity	−0.26^NS	0.82^**	−0.58^*	−0.04^NS	−0.77^**	0.05^NS
Growing degree days to flowering (GDF)	0.31^NS	0.82^*	−0.40^*	0.11^NS	−0.80^**	0.20^NS	0.68^**
Leaf area	0.33^NS	0.67^*	−0.28^NS	0.18^NS	−0.53^*	0.20^NS	0.31^NS	0.44^*

Where NS (non-significant); *Significant (P ≤ 0.05); **Highly significant (P ≤ 0.01).

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