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Evaluation of Yield and Yield Contributing Traits for Submergence Tolerance of Rice

W Afrin
Plant Breeding Division, Bangladesh Rice Research Institute, Gazipur 1701

M A Hossain
Department of Genetics & Plant Breeding, Bangladesh Agricultural University, Mymensingh 2202

M M Islam
Plant Breeding Division, Bangladesh Institute of Nuclear Agriculture, Mymensingh 2202

Abstract/ Executive Summary:

Ten rice genotypes were evaluated for association studies of yield and its contributing traits to select the traits for yield improvement in submerged condition. An experiment was conducted in the experimental field of Bangladesh Institute of Nuclear Agriculture (BINA) and 15 morphological traits Viz. Days to flowering (days), plant height (cm), Tiller number plant^-1 , (Nos.), effective tiller number plant^-1 (Nos.), 100 seed weight (g), harvest index (%) etc. were studies to measure nature of association between these traits and yield. Correlation studies showed total tiller number plant^-1 (0.661), effective tiller number plant^-1 (0.694), flag leaf breadth (0.651), fresh weight (0.705), dry weight (0.700) and harvest index (0.689) had significantly positive relationship on yield. Path co-efficient studies indicated direct positive association of tiller number plant^-1 (2.481), panicle length (2.431), Unfilled grain panicle^-1 (0.033), fresh weight (0.0451), dry weight (0.166), harvest index (1.255) and chlorophyll content (1.72) with yield. Breeding for submergence tolerance of rice genotypes considering these characters could be useful for improvement yield in future.

Keywords: Landraces, Submergence, Rice, Harvest index

Location: Bangladesh Institute of Nuclear Agriculture (BINA).

Start Date: 00-01-2015

End Date: 00-12-2015

Program Area: Variety and Species

Commodity: Rice

Objectives:

The present study aimed at identifying some yield contributing characters for yield improvement of submergence tolerance of rice genotypes.

Methodology:

An experiment was conducted in the experimental field of Bangladesh Institute of Nuclear Agriculture (BINA). Ten rice genotypes were evaluated for submergence tolerance in a randomized complete block design with five replications from January to December, 2015. The seeds were raised in a seedbed of 6 x 1 m. thirty days old seedlings were transplanted in small perforated pots. Each pots contained soil with nitrogen (N), phosphorous (P) and potassium (K) containing fertilizer. The way that fertilizers were mixed with soil was 50 mg N, 25 mg P, and 25 mg K per kilogram (Kg) of soil. Data were collected from five randomly selected plants of each genotype. Fifteen morphological characters were recorded Viz. days to flowering (Days), tiller number plant^-1 (Nos.), effective tiller number plant^-1 (Nos.), flag leaf length (cm), flag leaf breadth(cm), panicle length (cm), filled grain panicle^-1 (Nos.), unfilled grain panicle^-1 (Nos.), fresh weight (g), dry weight (g), 100 seed weight (g), harvest index and yield plant^-1 (g). MSTATC statistical software was used for analysis of data.

Source of Information: Progressive Agriculture 28 (1): 7-11, 2017

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Breeding for any crop variety always aimed at higher yield. Understanding the relationship between yield and yield contributing traits, help better improvement of crop for higher yield for breeding purpose. Present study showed association of days to flowering, tiller number plant^-1, effective tiller number plant^-1, flag leaf breadth, fresh weight, dry weight and harvest index with yield. Furthermore direct effect on yield was found for tiller number plant^-1, panicle length, unfilled grain panicle^-1, fresh weight, dry weight, harvest index and chlorophyll content. These characters can be useful tools for further breeding program to improve rice yield under submergence condition.

Knowledge Management: Journal