Genetic Advance and Grain Yield Stability of Moroccan Durum Wheats Grown under Rainfed and Irrigated Conditions

Table 5

Absolute and relative genetic changes in grain yield, spikes per m², kernels per spike, kernel weight, harvest index, spikelets per spike, kernels per spikelet, fertile tillering, plant height, and spike length in six durum wheat varieties grown under two water regimes (irrigated and rainfed) during three growing seasons (2017, 2018, and 2019).

	Grain yield (kg h^−−1)	Spikes per m^2	Kernels per spike	Kernel weight (mg)	Harvest index (%)	Spikelets per spike	Kernels per spikelet	Fertile tillering (%)	Plant height (cm)	Spike length (cm)
Irrigated
Absolute changes (year^−1)	78.08	2.19	−0.09	0.07	0.01	0.10	−0.02	0.33	−0.04	0.03
Relative changes % (year^−1)	1.75	0.51	−0.23	0.16	1.05	0.60	−0.79	0.51	−0.05	0.47
r^2	0.85	0.93	0.81	0.60	0.92	0.79	0.86	0.93	0.03	0.87
Rainfed
Absolute changes (year^−1)	−31.08	−0.69	0.10	−0.26	0.01	0.07	−0.01	0.08	−0.18	0.02
Relative changes % (year^−1)	−0.99	−0.24	0.23	−0.62	0.34	0.44	−0.18	0.14	−0.25	0.33
r^2	0.63	0.39	0.45	0.64	0.53	0.77	0.18	0.29	0.56	0.78

^∗Significant at 0.05 probability level. ^∗∗Significant at 0.01 probability level.