Table 3.

Drought stress tolerant index, heterosis, and heterobeltiosis base on 100 seeds weight of soybean genotypes in two irrigation conditions.

No.	Genotypes	100 seeds weight			Heterosisa			Heterobeltiosisa
		Normal (g)	Drought (g)	STIb	Normal (%)	Drought (%)	STIb (%)	Normal (%)	Drought (%)	STIb (%)
1	(D/G)-75-30-12	17.33	13.31	0.94	3	16	11	−21	−8	−27
2	(D/G)-75-50-30	17.06	12.50	0.86	1	9	3	−22	−13	−32
3	(D/G)-88-31-13	15.02	12.78	0.78	−11	11	−7	−32	−11	−39
4	(D/G)-94-9-4	14.97	12.93	0.78	−11	13	−7	−32	−10	−39
5	(D/G)-97-10-5	16.05	13.24	0.86	−5	15	3	−27	−8	−33
6	(D/G)-99-32-14	15.85	13.49	0.87	−6	18	3	−28	−6	−32
7	(D/G)-100-33-15	14.86	13.38	0.81	−12	17	−4	−32	−7	−37
8	(D/G)-102-34-16	15.94	12.77	0.83	−5	11	−2	−27	−11	−36
9	(D/G)-235-42-23	14.08	11.28	0.64	−16	−2	−23	−36	−22	−50
10	(D/G)-239-43-24	15.47	13.66	0.86	−8	19	2	−29	−5	−33
11	(D/G)-240-44-25	14.76	13.58	0.81	−12	18	−3	−33	−6	−37
12	(D/G)-241-45-26	16.70	11.56	0.78	−1	1	−7	−24	−20	−39
13	(D/G)-242-46-27	15.58	11.89	0.75	−8	4	−11	−29	−17	−41
14	(D/G)-245-47-28	15.99	14.53	0.94	−5	27	12	−27	1	−26
15	(D/G)-257-48-29	15.26	13.11	0.81	−9	14	−3	−30	−9	−37
16	Dering (D)c	11.77	8.52	0.41	—	—	—	—	—	—
17	Grobogan (G)c	21.93	14.41	1.28	—	—	—	—	—	—
Mean		15.71	12.73	0.82	−8.0	12.5	−3.2	−29.1	−10.4	−36.5

^aHeterosis (%) and heterobeltiosis (%) base on 100 seeds weight.

^bSTI = stress tolerant index.

^cParents of 15 soybean lines: Dering 1 variety = tolerant drought but small seed size and Grobogan variety = large seed size but susceptible to drought.