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Sudan Journal of Agricultural Research
Two doubled haploid bread wheat cultivars for irrigated heat-stressed
environments
Abdelbagi M. Ali1, Hala M. Mustafa1, Izzat S.A. Tahir1,
Abdalla B. Elahmadi1, Mohamed S. Mohamed1, Mohamed A.
Ali1, Asma M. A. Suliman2, M. Buam3 and Abu
Elhassan S. Ibrahim4
Abstract
Wheat doubled haploid (DH) technology has been established in Sudan to
accelerate development of new cultivars and increase selection efficiency in
the breeding programme. This paper presents the performance of two
heat-tolerant DH lines of bread wheat (Triticum aestivum L.) having high
yield potential and improved quality over the current Sudanese commercial
cultivars. The first line (designated as DH5) was developed from a cross
between cv Elnilain and the line 3400-1-3, while the second line (designated
as DH8) was developed from a cross between Condors (an advanced line) and
the line Condor’s’/14PYT//S145. The two crosses were made at the Gezira
Research Station (GRS), Wad Medani, in season 1998-99. The two lines were
selected from about 50 DH sister lines in each cross and subjected to a
preliminary evaluation in season 2001-02. The two DH lines, together with
other eight DH lines and three commercial check cultivars, were evaluated in
the field of GRS for two seasons (2002-03 and 2003-04) and in multi-location
yield trials in season 2003-04 at three agro-climatically different
locations (Wad Medani, Hudeiba and Dongola). Grain yields of DH5 and DH8
were significantly higher than the highest checks by 8 and 14% in the
on-station trials and by 6 and 5% in the multi-location trials,
respectively. Yield stability of DH8 was superior to the three checks, while
DH5 was more stable than two, and comparable to one, of the checks. DH5 and
DH8 had several heat-tolerance related traits that contributed to higher
grain yield under the heat-stressed environments of Sudan. They also showed
higher protein content, SDS sedimentation volume and bread specific volume,
all ranked them superior in bread-making quality compared to the checks.
Keywords:
Sudan Journal of Agricultural Research Vol. 6 (2006) PP. 35-42
