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Recovery from Submergence as a Selection Criterion in Rice

M. S. Pathan
Plant Breeding Division, Bangladesh Rice Research Institute, Gazipur-1701, Bangladesh.

N. M. Miah
Plant Breeding Division, Bangladesh Rice Research Institute, Gazipur-1701, Bangladesh.

M. E. Haque
Plant Breeding Division, Bangladesh Rice Research Institute, Gazipur-1701, Bangladesh.

S. M. B. Quader
Plant Breeding Division, Bangladesh Rice Research Institute, Gazipur-1701, Bangladesh.

H. C. Sarker
Plant Breeding Division, Bangladesh Rice Research Institute, Gazipur-1701, Bangladesh.

Abstract/ Executive Summary:

Relations of recovery from submergence with submergence tolerance and seedling heights were studied using BR5, Nizersail, Kumragoir, Dudmona, FR13A and their ten F hybrids constituting a 5x5 half diallel set under controlled conditions. The results showed that submergence tolerance, shorter seedlings before submergence and taller seedlings at recovery stage are positively associated with recovery ability. The recovery score should be a criteria for selection in submerged condition as the seedlings looked poor and almost dead immediately after drainage.The indices for selection should be initial short seedling, tall seedling at recovery and phenotypic recovery score.

Keywords: Recovery, Submergence , Selection criterion, Rice

Location: BRRI, Gazipur

Start Date: 00-00-1985

End Date: 00-00-1985

Program Area: Variety and Species

Commodity: Rice

Objectives:

To determine the relations of recovery from submergence with submergence tolerance and seedling height both before submergence and at the recovery stage.

Methodology:

The materials included five rainfed lowland rice varieties, FR13A, Dudmona, Kumragoir, Nizersail, BR5 and their 10 F_I hybrids obtained from one way diallel cross. Both the parents and F_ls were used to study the relations of recovery from submergence tolerance and seedling height both before submergence and after recovery period. The experiment was conducted at Bangladesh Rice Research Institute, Gazipur in 1985. Ten thirty-day-old seedlings, of each entry were transplanted in a cemented water tank in randomized complete block design with three replications. Seven days after transplanting (DAT), the materials were submerged for 10 days in semiturbid water at 50 cm depth above the soil. After submergence period, water was drained off and the tolerance score was recorded based on the phenotypic score from five randomly selected seedlings. The seedlings were again allowed to recover for 10 days and the score (1-9) was recorded similarly from five randomly selected seedlings based on the phenotypic appearances following standard evaluation system (SES) of IRRI , where 1 indicates highly recovered from submergence and 9 the least. Seedling height was taken both before submergence and after recovery period. Analysis of variance and correlation analysis were done to support the findings

Source of Information: Bangladesh Rice J. 2 (1 & 2): 113-116, 1991

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Submergence tolerance, shorter seedlings before submergence and taller seedlings at recovery stage are positively associated with recovery ability. The recovery score should be a criteria for selection in submerged condition as the seedlings looked poor and almost dead immediately after drainage. The indices for selection should be initial short seedling, tall seedling at recovery and phenotypic recovery score.

Knowledge Management: Journal