Agricultural Research Management Information System

Home
Research Summary
Search
About Us
- ARMIS
- Brochure
Contact Us
Report
User Request
Data Input
Help
- Operation Manual
  - PDF
  - Video
- Program Area & Commodity
We have reached 37600 number of research entries at this moment.

- Logout

Research Detail

Home
Research
Detail

Breeding Wheat for Heat and Salt Tolerance in Southern Bangladesh

N. C. D. Barma
Chief Scientific Officer
Wheat Research Centre, BARIGazipur-1701

Abstract/ Executive Summary:

Lines were selected for tolerance to high temperatures by growing them from planting dates in late December when crops are exposed to higher temperatures during grain filling phase. Performance from late planting indicated absolute high temperature tolerance and percentage differences in performance between planting dates indicated relative stability. Selection for tolerance to salinity was done at saline field sites first by a coarse assessment of many international and local wheat lines (salinity screening nursery) and then in detailed studies of the varieties that ranked best in that screening process (salinity observation trials, using 4 replicates). This double process cycled across three seasons. Combined heat and salt tolerance was sought by planting late at saline sites.Regarding heat is that all the recent elite varieties selected by WRC are similarly heat tolerant, judging by their similar yields, and differ primarily in seed boldness. Regarding salt tolerance, two lines were selected for commercial production in the south and named BARI GOM 25 and BARI GOM 26 as they demonstrated general suitability to normal or late planting and to salinity. V01078 also was a good purpose line that yielded consistently well across environments.

Keywords: Heat tolerance, Salinity tolerance

Location: Noakhali, Patuakhali, Shatkhira

Start Date: 20-11-2006

End Date: 30-04-2010

Program Area: Variety and Species

Commodity: Wheat

Objectives:

To identify and select suitable germplasm for the high temperature and saline environments of the region.

Methodology:

Several trials were conducted with advanced lines to identify high yielding heat-tolerant genotypes well adapted to this environment for release as varieties for the region. Variety trials were conducted in 2006-07 with 4 wheat varieties (Shatabdi, Bijoy, Prodip, Sourav) and one advanced line (BAW 1059) with the addition of two more varieties/lines (Sufi and BAW 1064) in 2007-08 at the Noakhali, Barisal and Bhola sites. One plot of Shatabdi was also included under non irrigated condition in both the years. All WRC-recommended practices were followed to grow the crops. During 2008, 5 elite varieties were provided to three farms (15 farms total) in each of Noakhali, Bhola, Barisal, Jhalakhati and Patuakhali and additionally three farms were asked to grow Shatabdi variety without irrigation.Salinity screening trials were initiated in 2006-07 with 52 wheat lines planted in non-replicated plots in Hajirhat, Noakhali. The soil in Hajirhat is moderately saline. Most of the materials used in the trial were from Australia, Pakistan, Nepal and India; some elite WRC advanced lines were included.This study assessed in 2008-09 with a further batch of 63 WRC advanced crosses and entries from Nepal and CIMMYT, Mexico in a saline soil, again at Hajirhat and again as part of the continuing search for heat and salinity tolerance characteristics. There were two replicates and areas of 2m² were harvested from each replicate plot which was 4 rows wide by 2.5 m length. The two check varieties were Shatabdi and Prodip. Planting was on 27 December 2008, so was late and exposed the lines to both heat and salinity.

Source of Information: ACIAR Technical Reports No. 78. ACIAR. pp. 170-182

Article Link (Online Journal):

Funding Source:

1. ACIAR

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Different yield trials and salinity nurseries and trials were conducted in the south both in saline and non saline areas and under late planting (heat stress) conditions during 2007-10. The salinity observation nursery worked well to test varieties identified in the Screening Nursery for tolerance to salinity and late planting. The Salinity Observation Nurseries, Salinity Screening Nurseries and Salinity trials were conducted during 2007-10 in saline soil of Noakhali, Patuakhali and Borguna. Variable number of advance lines and elite varieties were grown in saline soils under field conditions. BAW680, BAW1059, BAW 1064, GARUDA/BB/TOB... ICTAL123 are all maintaining their superiority over the high-yielding check varieties Shatabdi and Prodip. The advance lines BAW1103, BAW1104 and BAW1114 also showed good grain filling and performed better than Shatabdi and Prodip even under very late planting. Taken together with the salinity trial results from 2007-9, V01078 is clearly a good candidate for use in this saline region producing good yield whether sown at normal time or very late. BAW 1059 and BAW 1064 were also reported to be higher yielder under late planting conditions in the traditional areas. So these two lines were recommended for commercial cultivation in 2010 as BARI GOM 25 and BARI GOM 26, respectively.

Knowledge Management: Report/Proceedings