Similarity Patterns and Stability of Environmental Response in Sunflower Hybrids

Table 2

Sowing dates (S1, S2, and S3 code), temperature sums, cycle duration and rainfall parameters for three different anticipated sowing dates in 2007/08 at three location-year combinations (1, 2, and 3 code).

Location-year	Code	Sowing date	Code	T-sum^∗ (∘C days)	Cycle duration (days)	Rainfall (mm)
		08th Nov 2007	S1	2831	250	464.4
Valenzano 07/08	1	27th Nov 2007	S2	2334	230	406.2
		2nd Jan 2008	S3	2225	195	237.4
		21st Nov 2008	S1	2448	250	790.0
Valenzano 08/09	2	10th Dec 2008	S2	2338	230	683.4
		31st Dec 2008	S3	2241	210	593.8
		16th Nov 2007	S1	2214	258	312.0
Foggia 07/08	3	29th Nov 2007	S2	2174	245	290.0
		20th Dec 2007	S3	2121	224	248.3

^∗Temperature sums were calculated using a base temperature of 5^∘C.