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Performence of Some Rainfed Low Land Rice Genotypes in Different Agro-ecological Condition of Bangladesh

MR Biswash
Scientific Officer
Adaptive Research Division Bangladesh Rice Research Institute Gazipur, Bangladesh

MA Islam
Principal Scientific Officer
Adaptive Research Division Bangladesh Rice Research Institute Gazipur, Bangladesh

MR Islam
Principal Scientific Officer
Adaptive Research Division Bangladesh Rice Research Institute Gazipur, Bangladesh

B Karmakar
Senior Scientific Officer
Adaptive Research Division Bangladesh Rice Research Institute Gazipur, Bangladesh

S Parveen
Senior Scientific Officer
Adaptive Research Division Bangladesh Rice Research Institute Gazipur, Bangladesh

MHR Mukul
Scientific Officer
Adaptive Research Division Bangladesh Rice Research Institute Gazipur, Bangladesh

Abstract/ Executive Summary:

Rainfed Lowland Rice (RLR) ecosystem is a major potential area for rice production during wet season in Bangladesh. But the productivity of rice in RLR ecosystem is relatively low because of uncertainty of rainfed and other physiological and climatic constraints. Genetic improvement of rice under these complex and adverse conditions is perhaps the major challenge facing the rice breeders today. With this view, three advanced lines: BR7472-16-2-1-2-3, BR7622-5-1-1-1 and BR7639-68-2-1-1 along with BRRI dhan39 and BRRI dhan49 as checks were tested in eight locations during Aman 2013. Among the entries, all the advanced lines out yielded (averaged yield ranged from 4.58 to 4.68 t/ha) the check variety BRRI dhan39 (4.33 t/ha) but it was statistically similar to BRRI dhan49 (4.74 t/ha). BR7472-16-2-1-2-3, having average yield of 4.68 t/ha, gave the highest yield in two locations out of eight. The entries BR7639-68-2-1-1 and BR7622-5-1-1-1, having average yield of 4.65 and 4.58 t/ha respectively, each gave the highest yield in one location out of eight. Having average yield of 4.74 t/ha, the check variety BRRI dhan49 gave the highest yield in four locations. Growth duration of tested entries ranged from 124-128 days which was 4-8 days earlier than BRRI dhan49 (132 days). However, it was 123 days for another check BRRI dhan39. The grain size of the three lines including check variety BRRI dhan39 were very similar (1000-grain wt. 23.5g - 24.4g) and bolder than the other check variety BRRI dhan49 having 1000-grain weight of 21.4g. Mean plant height of all advanced lines ranged from 104 – 110 cm and it was higher than BRRI dhan49 (99 cm) and BRRI dhan39 (103 cm). Most farmers preferred the check variety BRRI dhan49 for its good yield and excellent grain quality. Some farmers also preferred BR7472-16-2-1-2-3 and BR7622-5-1-1-1 for its good yield and shorter growth duration than BRRI dhan49.

Keywords: Advance breeding genotypes, Rainfed lowland environment, Grain yield.

Location: BRRI research farm (Gazipur), Rajshahi (Godagari), Barisal (Sadar), Chittagong (Hathazari), Comilla (Muradnagar), Rangpur (Pirgonj), Sylhet (Sadar) and Jessore (Jhikoregacha)

Start Date: 00-00-2013

End Date: 00-00-2013

Program Area: Variety and Species

Commodity: Rice

Objectives:

To evaluate the yield potential and adaptability of advanced breeding lines under rainfed low land environment in different agro-ecological zone.
To get feedback information about the advantages and disadvantages of the advanced lines from farmers and DAE personnel.

Methodology:

Three advanced lines BR7472-16-2-1-2-3, BR7622-5-1-1-1 and BR7639-68-2-1-1 along with BRRI dhan39 and BRRI dhan49 as checks were tested in eight locations such as BRRI research farm (Gazipur), Rajshahi (Godagari), Barisal (Sadar), Chittagong (Hathazari), Comilla (Muradnagar), Rangpur (Pirgonj), Sylhet (Sadar) and Jessore (Jhikoregacha) during T. Aman, 2013. The trial was conducted in RCBD with three replications in each location. The unit plot size for each entry was 15 m² (5m x 3m). Seeding time was 20 July, 2013 and Seedling ages were varied from 25-30 days among the locations under varied circumstances. Seedlings were transplanted at 20 cm x 15 cm spacing. Fertilizers were applied at 90: 15: 50: 12: 3.6 kg NPKSZn/ha. Standard management practices were followed uniformity for all entries. Plant height was measured from 10 randomly selected plants from center and four corner of each plot excluding border area. At maturity, panicles were counted from 1 m² in each replication. From the center of each plot, 10-m² area was harvested for determination of grain yield at maturity. Grain yield was adjusted to 14% moisture content, and expressed in t ha^-1. Data gathered in the experiments were statistically analyzed using statistical software CropStat7.2 and means were compared with the least significant difference (LSD) test.

Source of Information: Applied Science Reports, 9 (3), 161-165.

Article Link (Online Journal): www.pscipub.com, (DOI:10.15192/PSCP.ASR.2015.9.3.161165)

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

There is significant variation among the tested genotypes. Three advanced lines: BR7472-16-2-1-2-3, BR7622-5-1-1-1 and BR7639-68-2-1-1 along with BRRI dhan39 and BRRI dhan49 as checks were tested in different locations in Bangladesh during T. Aman, 2013. Based on growth duration, yield and yield contributing character, acceptable grain quality, insect infestations, disease infection, lodging incidence and farmers’ opinion, BR7472-16-2-1-2-3 and BR7622-5-1-1-1 was recommended for Proposed Variety Trial (PVT).

Knowledge Management: Journal