1) Existing rice varieties in coastal Bangladesh have low yields, late maturity, and are not well suited for the local conditions and cropping systems. 2) New rice varieties were tested that have tolerance to water stagnation and salinity, shorter durations to allow for intensified cropping, and locally preferred grain types. 3) The highest yielding and best performing varieties identified were BRRI dhan53 for aman rice across sites, and BRRI dhan29, BRRI dhan47 and BRRI dhan61 for boro rice depending on the site's salinity level. These varieties are recommended to improve productivity and suit the coastal rice cropping systems.

1. Improved aman & boro varieties for the
coastal zone of Bangladesh
Md. Ruhul Amin Sarker

2.  Single low yield (2-3.5 t/ha)
 Late maturity (photoperiod sensitive) aman
 Much fallow land during dry season
 Some low yielding rabi crops
 Some Aus areas where fresh water
0
30
60
90
120
150
180
24 Jun 15 July 7 Aug
Duration(days)
Sowing date
0
50
100
150
200
250
300
350
400
24 Jun 15 July 7 Aug
Maturitydate
Sowing date
5 Dec 9 Dec9 Dec
Most of Coastal zones

3. 1. Tolerant to water stagnation
2. Tolerant to salinity (e. i. aman-shrimp)
3. Shorter duration (Photoperiod Insensitive) for cropping
system intensification
4. Locally preferred grain type
Need for Coastal Zone (Aman)
BRRI dhan52

4. Polder-3
Satkhira
HIGHLY
SALINE
Polder-30
Khulna
MODERATELY
SALINE
Study areas in Bangladesh for varietal trials & cropping systems
Polder-43/2F
Patuakhali
VERY SLIGHTLY
SALINE
4

5. Productivity Improvement in low salt affected areas
(Year-round FRESH water)
 Fresh water available < 1 dS/m for year round
 Traditional Aman Rice 2 - 3.5 t/ha
 Grasspea, chilli, some vegetables in rabi, mostly fallow

6. Productivity Improvement in Polder 30
(Medium salt affected area)
 Water salinity, EC 0.5 - 14 dS/m
 Traditional Aman Rice cultivated, water stagnation
 Average Yield 2- 3.0 t/ha
 Sesame, mungbean and some vegetables in rabi
season others mostly fallow
 Scarcity of fresh irrigation water rabi season

7.  10-12 varieties
 3 seeding dates (24 June, 15 July and 07 August)
 3 cropping seasons (T. Aman 2011, 2012 and 2013)
(Boro 2011-12, 2012-13 and 2013-14)
 Farmers’ field
BRRI dhan53
Variety evaluated

8. 0
1
2
3
4
5
6
7
Yield(t/ha)
Variety
Low salinity-Aman
0
20
40
60
80
100
120
140
160
180
Duration(days)
Variety

9. Varietal trial in Polder43, Bazarkhali, Amtoli, Borguna, Aman

10. Farmers field, Bazarkhali

11. 0
1
2
3
4
5
6
7
Yield(t/ha)
Variety
Medium Salinity-Aman
0
20
40
60
80
100
120
140
160
180
Duration(days)
Variety

12. Varietal trial in Polder30, Kismotfultola, Khulna, Aman

13. 0
1
2
3
4
5
6
7
BR11-Saltol BRRI
dhan41
BRRI
dhan44
BRRI
dhan52
BRRI
dhan53
BRRI
dhan54
BINA dhan8 Local Var.
Yield(t/ha)
Variety
Pol-43 Pol-30
0
20
40
60
80
100
120
140
160
180
BR11-Saltol BRRI dhan41 BRRI dhan44 BRRI dhan52 BRRI dhan53 BRRI dhan54 BINA dhan8 Local Var.
Duration(days)
Variety
Pol-43 Pol-30
Yield and growth duration (days) comparison between Polder 43 and Polder 30, T. Aman

14. Participatory varietal selection (PVS)
T. Aman
(Polder-43)
BRRI dhan52 (59 farmers; 44 male and 15 female)
BRRI dhan53 (34 farmers; 19 male and 15 female)
Polder-30
BRRI dhan52 and BR11-Saltol (28 farmers, 18 male and 10 female)
BRRI dhan41 (23 farmers; 17 male and 6 female)
BRRI dhan44 (16 farmers; 9 male and 7 female)

15. PVS activities at Bazarkhali (Polder 43/2/F), Amtoli, Barguna, T. Aman

16. Different activities of PVS function at Kismatfultola (Polder 30), Bhatiaghata, Khulna, T. Aman

17. Need for Coastal zones
(Boro- for areas where fresh water available)
1. Tolerance to salinity (medium salinity areas)
2. Shorter duration - where fresh water limited (medium salinity areas)
- for intensification to 3 crops/year
3. Locally preferred grain type
4. Cold tolerance

18. 0
1
2
3
4
5
6
7
8
9
Yield(t/ha)
Variety
Low Salinity-Boro
0
20
40
60
80
100
120
140
160
180
Duration(days)
Variety

19. 0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
yield(t/ha)
Variety
0
2
4
6
8
10
12
14
16
EC(dS/m)
Date
EC…
Water Salinity EC (dS/m)
Medium Salinity-Boro
0
20
40
60
80
100
120
140
160
180
Duration(days)
Variety

20. 0
1
2
3
4
5
6
7
8
BRRI
dhan28
BRRI
dhan29
BRRI
dhan45
BRRI
dhan47
BRRI
dhan50
BRRI
dhan55
BRRI
dhan58
BINA
dhan8
BRRI
dhan61
Yield(t/ha)
Variety
Pol-43 Pol-30
0
20
40
60
80
100
120
140
160
180
BRRI
dhan28
BRRI
dhan29
BRRI
dhan45
BRRI
dhan47
BRRI
dhan50
BRRI
dhan55
BRRI
dhan58
BINA
dhan8
BRRI
dhan61
Duration(days)
Variety
Pol-43 Pol-30
Yield and growth duration (days) comparison between Polder 43 and Polder 30, Boro

21. Varietal trial in Polder43, Bazarkhali, Amtoli, Borguna, Boro

22. Varietal trial in Polder30, Kismotfultola, Khulna, Boro

23. Participatory varietal selection (PVS)
Boro
(Polder-43)
BRRI dhan29 (28 farmers; 16 male and 12 female)
BRRI dhan28 (22 farmers; 13 male and 9 female)
BRRI dhan47 (15 farmers; 15 male)
Polder-30
BRRI dhan47 (37 farmers, 23 male and14 female)
BRRI dhan50 and BR7100-R-6-6 (18 farmers; 12 male and 6 female)
BRRI dhan61 (8 farmers; 4 male and 4 female)

24. PVS activities function at Bazarkhali (Polder 43/2/F), Amtoli, Barguna, Boro2012-13

25. Different activities of PVS function at Kismotfultila (Polder 30), Batiaghata, Khulna, Boro2012-13.

26. 0
1
2
3
4
5
6
FVFM FVIM IVFM IVIM
2.4
3.3
4
5.5
Yield(t/ha)
Variety + Management
Contribution of IV and IM on yield performance

27. Summary and conclusions
T. Aman:
 Growth duration was higher in 1st seeding date (24 June).
 Yield was higher in 2nd seeding date (15 July).
BRRI dhan53 (<120 days) produced the highest yield.
 BRRI dhan44, 51, 52 and 54, and BR11-Saltol (120-140 days) gave the
highest yield in Polder 43/2/F.
 BR11-Saltol, BRRI dhan49, BRRI dhan52 and BRRI dhan54 (120-140
days) produced the highest yield in Polder 30.
Boro:
 Highest average yield produced by BRRI dhan29 (7.3 t/ha, 162 days)
followed by BRRI dhan47 (6.8 t/ha, 153 days), BRRI dhan61 (6.6 t/ha, 152
days) and BRRI dhan28 (6.0 t/ha, 147 days) in Polder 43/2/F.
 In Polder 30, BRRI dhan61 (4.0 t/ha, 150 days) and BRRI dhan47 (4.0
t/ha, 153 days) gave the highest yield followed by BINA dhan8 (3.7 t/ha, 151
days) and BRRI dhan29 (3.7 t/ha, 161 days)

28. Recommendations
T. Aman:
 15 July -the optimum seeding date for both sites
 BRRI dhan53 (<120 days) performed the best at both sites, and BINA
dhan8 was suitable for Polder 30.
 BR11-Saltol (5.3 t/ha), BRRI dhan52 (4.8 t/ha) and BRRI dhan54 (4.6
t/ha) would be suitable for both areas.
Boro:
 BRRI dhan47, BRRI dhan61 and BINA dhan8 would be most suitable
for aman-boro systems in Polder 30.
 BRRI dhan28, BRRI dhan47 and BRRI dhan61 would be appropriate
for triple rice systems in Polder 43/2/F.
 BRRI dhan29 is feasible and would maximize production.

29. Thank you