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Evaluation of Sweet Potato Genotypes Against Salinity Under Laboratory Condition

Farida Begum.
Chief Scientific Officer
Plant Physiology Division, BARI, Joydebpur, Gazipur.

Shamsul Alam
Tuber Crops Research Centre, BAR, Joydebpur, Gazipur.

H.C. Mohanto
Tuber Crops Research Centre, BAR, Joydebpur, Gazipur.

Abstract/ Executive Summary:

Ten sweet potato lines/varieties were studied for growth response under NaCl salt stress condition. The rooting ability, in terms of root number, root length and also root volume were studied. Growth in terms of root and shoot dry weight was also studied. A variation was recorded among the eight varieties and two lines with different doses of NaCl for growth responses in terms of rooting ability. Out of 10 genotypes, only BARI SP9 and SP 613, showed rooting ability up to 20dS-m. Some genotypes (BARI SP 2, BARI SP 3, BARI SP 7, BARI SP 9 and line SP 613) showed an initial increase in root number as compared to control. Genotype BARI SP 9 and line SP 613 showed better performance upto15dS-m and can be selected for further trial.

Keywords: Sweet Potato genotype, Salinity stress condition

Location: Joydebpur, Gazipur

Start Date: 06-04-2011

End Date: 08-06-2011

Program Area: Risk Management in Agriculture

Non-commodity: Performance

Objectives:

To evaluate the response of sweet potato in terms of root growth under NaCl stress condition

Methodology:

A laboratory experiment was conducted in Agronomy laboratory, TCRC, to study the root and shoot initiation, especially the root number, root length and root dry weight. Ten sweet potato genotypes/ lines were used in the present investigation. Nodal explants (8-10cm) of all the genotypes were selected for hydroponics culture in Hoagland nutrient medium. Different doses of NaCl were applied to make the treatment solution. Five levels of salinity 1.8 dS-m, 6 dS-m , 10 dS-m, 15 dS-m and 20 dS-m were used. Treatment solutions were prepared as follows: To= Tap water mixed with Hoagland nutrient solution (1.8 dS-m). Treatments T₁, T₂, T₃ and T₄= salt of NaCl added to prepare 6, 10, 15 and 20 salinity. Plantlets were grown for two weeks. Root no., root length, root dry weight and shoot dry weight were recorded.

Source of Information: TCRC Annual Report-2010-11, BARI

Article Link (Online Journal):

Funding Source:

1. Government

Budget: 10,000/=

Total Budget (Tk.) : 10,000/=

Achievement/Findings:

Out of 10 genotypes, only BARI SP9 and SP 613, showed rooting ability up to 20dS^-m. Some genotypes (BARI SP 2, BARI SP 3, BARI SP 7, BARI SP 9 and line SP 613) showed an initial increase in root number as compared to control. Genotype BARI SP 9 and line SP 613 showed better performance upto15dS^-m and can be selected for further trial.

Knowledge Management: Report/Proceedings