Improvement of drought tolerance in rice using line X tester mating design and biochemical molecular markers

Bulletin of the National Research Centre

Table.9 Effects of the normal and drought stress conditions on polyphenol oxidase (PPO) isozymes for 13 rice genotypes (eight parents and the highest five hybrids)

Band No.	1 (L1)	2 (L2)	3 (L3)	4 (L4)	5 (L5)	(6) T1	7 (T2)	8 (T3)	9 ( L1 X T1)	10 (L2 X T3)	11 (L3 X T3)	12 (L4 X T3)	13 (L5 X T1)
Normal conditions
1	+	+ + +	+ + +	+ + +	+	+ + +	+ + +	+ +	+	+ + +	+ +	+	+ +
Total	1	1	1	1	1	1	1	1	1	1	1	1	1
Drought stress conditions
1	+	+ +	+ +	+ +	+ + +	+ + +	+ +	+ +	+ +	+ +	+ + +	+ + +	+ + +
2	+	+ +	+ + +	+ + +	+ + +	+ + +	+ + +	+ + +	+ + +	+ + +	−	−	−
3	+	+ +	+ + +	+ + +	+ + +	+ + +	+ + +	+ + +	+ + +	+ + +	−	−	−
Total	3	3	3	3	3	3	3	3	3	3	1	1	1