Quantitative trait loci controlling cyanogenic glucoside and dry matter content in cassava (Manihot esculenta Crantz) roots

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dc.contributor.authorKizito, Elizabeth B.
dc.contributor.authorStljung, Ann-Christin Ro¨ Nnberg-Wa¨
dc.contributor.authorEgwang, Thomas
dc.contributor.authorGullberg, Urban
dc.contributor.authorFregene, Martin
dc.contributor.authorWesterbergh, Anna
dc.date.accessioned2017-12-18T14:17:59Z
dc.date.accessioned2021-12-21T09:04:46Z
dc.date.available2017-12-18T14:17:59Z
dc.date.available2021-12-21T09:04:46Z
dc.date.issued2007
dc.descriptionThis paper carried research on Cassava (Manihot esculenta Crantz) as a starchy root crop grown in the tropics mainly by small-scale farmers even though agro-industrial processing is rapidly increasingen_US
dc.description.abstractCassava (Manihot esculenta Crantz) is a starchy root crop grown in the tropics mainly by small-scale farmers even though agro-industrial processing is rapidly increasing. For this processing market improved varieties with high dry matter root content (DMC) is required. Potentially toxic cyanogenic glucosides are synthesized in the leaves and translocated to the roots. Selection for varieties with low cyanogenic glucoside potential (CNP) and high DMC is among the principal objectives in cassava breeding programs. However, these traits are highly influenced by the environmental conditions and the genetic control of these traits is not well understood. An S1 population derived from a cross between two bred cassava varieties (MCOL 1684 and Rayong 1) that differ in CNP and DMC was used to study the heritability and genetic basis of these traits. A broad-sense heritability of 0.43 and 0.42 was found for CNP and DMC, respectively. The moderate heritabilities for DMC and CNP indicate that the phenotypic variation of these traits is explained by a genetic component. We found two quantitative trait loci (QTL) on two different linkage groups controlling CNP and six QTL on four different linkage groups controlling DMC. One QTL for CNP and one QTL for DMC mapped near each other, suggesting pleiotrophy and/or linkage of QTL. The two QTL for CNP showed additive effects while the six QTL for DMC showed additive effect, dominance or over dominance. This study is a first step towards developing molecular marker tools for efficient breeding of CNP and DMC in cassava.en_US
dc.identifier.citationKizito Elizabeth B. et al Quantitative trait loci controlling cyanogenic glucoside and dry matter content in cassava (Manihot esculenta Crantz) roots. Vol.144 pp. 129-136 Department of Plant Biology and Forest Genetics, Swedish University of Agricultural Sciences DOI: 10.1111/j.2007.0018-0661.01975.xen_US
dc.identifier.urihttps://hdl.handle.net/20.500.11951/89
dc.language.isoenen_US
dc.publisherHereditasen_US
dc.subjectCassava (Manihot esculenta Crantz)en_US
dc.subjectAgro-farmers-Cassavaen_US
dc.subjectCassava-Tropicsen_US
dc.titleQuantitative trait loci controlling cyanogenic glucoside and dry matter content in cassava (Manihot esculenta Crantz) rootsen_US
dc.typeArticleen_US
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