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Growth and Salinity Tolerance of Wheat Genotypes at Early Vegetative Stage

M S Uddin
Regional Agricultural Research Station, Bangladesh Agriculture Research Institute, Rahmatpur, Barisal 8211, Bangladesh

N Jahan
Regional Agricultural Research Station, Bangladesh Agriculture Research Institute, Rahmatpur, Barisal 8211, Bangladesh

M A Monim
Regional Agricultural Research Station, Bangladesh Agriculture Research Institute, Rahmatpur, Barisal 8211, Bangladesh

Abstract/ Executive Summary:

Growth and salinity tolerance study of wheat genotypes were conducted at regional agricultural research station to evaluate the selected wheat genotypes against salinity and to classify the wheat genotypes in different salt tolerant group. The experiment was carried out with 12 wheat genotypes under semi-controlled environment (inside plastic greenhouse) and natural light in a randomized complete block (RCBD).The materials were evaluated under control (non-saline) and 16 dS/m salinity level. A significant variation among the genotypes was observed for shoot length under both environments. The lowest reduction (2%) was found from G11 followed by G40 (4%). The genotypes showed differences in production of total shoot dry matter (TDM) at both non-saline and saline conditions. The relative TDM per plant (% TDM to control condition) appears that three genotypes (G24_, G33and G40) produced 90% RTDM. Salt tolerant genotype was found to be less affected at high salinity and could be produced better TDM compared to other genotypes. Three genotypes G24, G33 and G40 exhibited tolerant category. The distribution pattern of the genotypes into various salinity tolerance groups indicates that the overall pattern of behaviors of the genotypes tested remain fairly constant under two methods (based on RTDM and visual scoring).

Keywords: Salinity, Tolerant, Susceptible, Wheat, Vegetative stage

Location: Wheat Research Centre, BARI, Joydebpur, Gazipur

Start Date: 00-00-2009

End Date: 00-00-2010

Program Area: Variety and Species

Commodity: Wheat

Objectives:

To evaluate the selected wheat genotypes against salinity and to classify the wheat genotypes in different salt tolerant group.

Methodology:

The experiment was carried out with 12 wheat genotypes, collected from Wheat Research Centre, BARI, Joydebpur, Gazipur, in pot culture under semi-controlled environment (inside plastic greenhouse) and natural light during seasons of 2009-10. The experiment was laid out in a randomized complete block (RCBD) with three replications. The materials were evaluated under control (non-saline) and 16 dS/m salinity level. Salt solution was prepared artificially by dissolving calculated amount of commercially available NaCl with tap water to make 160 mM NaCl solution. The salt solution was applied with an increment of 40 mM at every alternate day till the respective concentrations were attained. Plants in control were irrigated with tap water. Treatment solution was applied in excess so that extra solution dripped out from the bottoms of the pots. Treatments began 12 days after sowing and were continued for 10 days, after which the pots were flushed with tap water to leach out the accumulated salt and the plants were irrigated with tap water (Ashraf and McNeilly, 1987; Aziz et al., 2005, 2006). Data on different salinity parameters were recorded as follows: Reduction of shoot length (%): Shoot length at non-saline - shoot length at saline/Shoot length at non-saline X 100, Reduction of shoot dry matter (RSDM): Shoot dry wt. at non-saline – shoot dry wt. at saline/Shoot dry wt. at non-saline X 100, Relative total dry matter (RTDM %): Shoot dry wt. at saline/Shoot dry wt. at non-saline X 100, Salinity scoring was done with 0-9 scale based on RTDM% (Ashraf and Waheed, 1990) and 1-9 scale based on visually using the modified standard evaluation system (SES) of IRRI (Ray and Islam, 2007).The collected data were analyzed statistically following Gomez and Gomez (1984).

Source of Information: Progressive Agriculture 28 (1): 12-17, 2017

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

From this study it is observed that salt tolerant genotype was found to be less affected at high salinity and could be produced better TDM compared to other genotypes. Three genotypes G24, G33 and G40 proved to be the tolerant.

Knowledge Management: Journal