Improving Drought Tolerance in Sorghum bicolor L. Moench Marker-Assisted Transfer of the Stay-Green Quantitative Trait Loci (QTL) rom a CharacterizedDonor Source into a Local Farmer Variety
Date
2013-04-19Author
Ngugi, Kahiu
Kimani, Wilson
Kiambi, Dan
Mutitu, Eunice W.
Type
ArticleLanguage
enMetadata
Show full item recordAbstract
Drought stress is
a major constraint to sorghum production in Kenya, especially during flowering stage. This study
aimed at developing drought tolerant sorghum varieties by transferring the stay green trait that confers drought tolerance in
sorghum from a mapped and charact
erized donor source into an adapted farmer preferred variety. The drought tolerance donor
source, E36
-
1 originally from
Ethiopia was backcrossed into a Kenyan farmer
-
preferred variety, Ochuti until BC
2
F
1
generation
and the stay
-
green Quantitative Trait Loc
i (QTL) were transferred through Marker Assisted Breeding (MAB) strategy. Five
polymorphic Simple Sequence Repeat (SSR) markers were used to select the 3 stay green QTL of E36
-
1 found in SBI
-
01, SBI
-
07 and SBI
-
10 linkage groups. In the F
1
generation, two o
f these QTL
,
were transferred into three genotypes. In the BC
1
F
1
generation, 32 genotypes had at least one QTL incorporated. From a population of 157 BC
2
F
1
progenies, 45 genotypes had
incorporated either one or two
of the
stay
-
green QTL. Despite a few numb
er of genotypes obtained through the backcrosses,
the results showed that stay
-
green QTL and consequently drought tolerance can be transferred successfully into farmer preferred sorghum varieties through MAB
URI
http://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/31662http://www.academia.edu/3656558/IJSRK-published_paper-May2013
Citation
International Journal of scientific reaserch in Knowledge 1(6), pp. 154-162Publisher
Univesity of Nairobi Department of Plant Science and Crop Protection