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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

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Relation http://oar.icrisat.org/6950/
http://dx.doi.org/10.12983/ijsrk-2013-p154-162
 
Title 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
 
Creator Ngugi, K
Kimani, W
Kiambi, D
Mutitu, E W
 
Subject Sorghum
 
Description 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 characterized 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 BC2F1 generation and the stay-green Quantitative Trait Loci (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 F1 generation, two of these QTL, were transferred into three genotypes. In the BC1F1 generation, 32 genotypes had at least one QTL incorporated. From a population of 157 BC2F1 progenies, 45 genotypes had incorporated either one or two of the stay-green QTL. Despite a few number 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.
 
Publisher International Journal of Scientific Knowledge (Computing & Information Technology)
 
Date 2013
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/6950/1/IJSRK_1_6_154-162_2013.pdf
Ngugi, K and Kimani, W and Kiambi, D and Mutitu, E W (2013) 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. International Journal of Scientific Research in Knowledge, 1 (6). pp. 154-162. ISSN 2322-4541