Improving Drought Tolerance in Sorghum bicolor L. Moench: Marker - Assisted Transfer of the Stay - Green Quantitative Trait Loci (QTL) from a Characterized Donor Source into a Local Farmer Variety
View/ Open
Date
2013Author
Kahiu, Ngugi
Kiambi, Dan
Mutitu, Eunice W
Kimani, Wilson
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://ijsrpub.com/uploads/papers/IJSRK/IJSRK-June2013/IJSRK-13-30.pdfhttp://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/32036
Citation
International Journ al of Scientific Research in Knowledge (IJSRK), 1(6), pp. 1 54 - 1 62 , 2013Publisher
University of Nairobi. University of Nairobi, Faculty of Agriculture, Department of Plant Science and Crop Protection
Subject
DroughtFore - Ground Selection
Ba ck - Ground Selection
Simple Sequence Repeats
Stay - Green QTL