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Evaluation of Submergence Tolerant Rice Genotypes for Flood Prone Areas of Bangladesh

M. M. Islam
Bitechnology Division, Bangladesh Institute of Nuclear Agriculture, Mymensingh, Bangladesh

M. M. Hassan Sohel
Bitechnology Division, Bangladesh Institute of Nuclear Agriculture, Mymensingh, Bangladesh

M. N. Hoque
Bitechnology Division, Bangladesh Institute of Nuclear Agriculture, Mymensingh, Bangladesh

S. N. Begum
Plant Breeding Division, Bangladesh Institute of Nuclear Agriculture, Mymensingh, Bangladesh

M. S. R. Khanom
Bitechnology Division, Bangladesh Institute of Nuclear Agriculture, Mymensingh, Bangladesh

Abstract/ Executive Summary:

Flood in Bangladesh is almost an annual feature and the second most climate problem or stress. Eight rice genotypes including one mutant variety were tested for submergence. Two genotypes viz., Ciherang-sub 1 and Samba Mahsuri-sub 1 performed better with regard to complete submergence of 20-25 days. These two submergence tolerant genotypes showed better performance with respect to earliness, long slender grain and intermediate amylose content than submergence tolerant rice varieties, BRRI dhan51 and BRRI dhan52. Ciherang-sub 1 possessed long and medium grain, milling yield was 71%, chalkiness less than 10%, and 23.74% amylose content and milling yield of Samba Mahsuri-sub 1 was 72%, chalkiness less than 10%, size of the dehuled grain was short and medium and amylose content 24.36%.

Keywords: Rice genotypes,Submergence tolerance, Flood prone areas

Location: Dhubaura, Mymensingh district

Start Date: 00-00-2008

End Date: 00-00-2008

Program Area: Variety and Species

Non-commodity: Performance

Objectives:

(a)To assess the submergence tolerance ability and yield performance

(b)To select the submergence tolerant genotypes as varieties.

Methodology:

A total of eight rice genotypes including one mutant variety, Binadhna-7 were tested for submergence at aman season from 2008-12. The 25-30 days old seedlings were transplanted at 15 cm distances within rows of 20 cm apart during last week of June to 1^st week of July. Fertilizer application was as like other T. aman rice but when if flooded the dose was changed. Under submergence condition the fertilizer recommendation dose was TSP 125 kg ha^-1, MP 47 kg ha^-1 (2/3 was applied during field preparation), Gypsum 60 ha^-1, Zinc-Sulfate 10 kg ha^-1. Ten days after flooding 45 kg ha^-1 and after 20-25 days 45 kg ha^-1urea was added. One third of MP 23 kg ha^-1 was applied with urea after 10 days of flood. Moreover recommended insecticides, fungicide and nematocides were applied as necessary. After recession of flood water Furadan 5G 50 g decimal^-1 was applied with Urea to kill the nematode and fungus. Marshal 20 EC was applied to recovery the Tungro diseases as 30 ml in 10 L water decimal-1 after 7 and 25 days sowing seed. Eight rice genotypes along with one mutant variety, Binadhan-7 were screened for submergence tolerance at Dhubaura, Mymensingh district in aman (wet) season during 2008. The experiment was laid out in RCBD with three replications. Unit plot size was 5 m × 2.2 m and spacing between hills and rows were 15 cm × 20 cm. The experimental genotypes were submerged for 14 days. Participatory varietal selection was done to select the best lines. The selected two lines were evaluated in the subsequent years (2009-2012) for their agronomic and yield performance. The size and shape of dehulled grain/kernel was measured according to USDA scale.

Source of Information: Bangladesh J. Nuclear Agric. 29: 49-57, 2013, ISSN 0258-7130

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

BINA introduced two submergence tolerant rice varieties Ciherang-Sub 1 and Samba Mahsuri-Sub1 by marker assisted selection (MAS). Two genotypes viz., Ciherang-Sub 1 and Samba Mahsuri-sub1 performed better with regard to complete submergence of 20-25 days. These two lines were evaluated in different location from 2009 to 2012 and finally in the year of 2013 they got the recognition as variety from national seed board. Ciherang-Sub 1 and Ciherang-Sub 1 are more submergence tolerant than IRRI and BRRI released varieties. Ciherang-Sub 1 is 20-25 days earlier than BRRI released popular submergence tolerant variety BRRI dhan51. Samba Mahsuri-Sub1 got highly preference due to its natural miniket shape and shininess. Both submergence tolerant rice contain medium amount of amylose which is highly preferred by the consumers.

Knowledge Management: Journal