Genetic control of yield related stalk traits in sugarcane

Aitken, K. S., Hermann, S., Karno, K., Bonnett, G. D., McIntyre, L. C. and Jackson, P. A. (2008) Genetic control of yield related stalk traits in sugarcane. Theoretical and Applied Genetics, 117 7: 1191-1203. doi:10.1007/s00122-008-0856-6


Author Aitken, K. S.
Hermann, S.
Karno, K.
Bonnett, G. D.
McIntyre, L. C.
Jackson, P. A.
Title Genetic control of yield related stalk traits in sugarcane
Journal name Theoretical and Applied Genetics   Check publisher's open access policy
ISSN 0040-5752
1432-2242
Publication date 2008-11-01
Sub-type Article (original research)
DOI 10.1007/s00122-008-0856-6
Open Access Status
Volume 117
Issue 7
Start page 1191
End page 1203
Total pages 13
Place of publication Heidelberg, Germany
Publisher Springer
Language eng
Formatted abstract
A major focus of sugarcane variety improvement programs is to increase sugar yield, which can be accomplished by either increasing the sugar content of the cane or by increasing cane yield, as the correlation between these traits is low. We used a cross between an Australian sugarcane variety Q165, and a Saccharum officinarum accession, IJ76-514, to dissect the inheritance of yieldrelated traits in the complex polyploid sugarcane. A population of 227 individuals was grown in a replicated field trial and evaluated over 3 years for stalk weight, stalk diameter, stalk number, stalk length and total biomass. Over 1,000 AFLP and SSR markers were scored across the
population and used to identify quantitative trait loci (QTL). In total, 27 regions were found that were significant at the 5% threshold using permutation tests with at least one trait; individually, they explained from 4 to 10% of the phenotypic variation and up to 46% were consistent across years. With the inclusion of digeneic interactions, from 28 to 60% of the variation was explained for these traits. The 27 genomic regions were located on 22 linkage groups (LGs) in six of the eight homology groups (HGs) indicating that a number of alleles or quantitative trait alleles (QTA) at each QTL contribute to the trait; from one to three alleles had an effect on the traits for each QTL identified. Alleles of a candidate gene, TEOSINTE BRANCHED 1 (TB1), the major gene controlling branching in maize, were mapped in this population using either an SSR or SNP markers. Two alleles showed some association with stalk number,
but unlike maize, TB1 is not a major gene controlling branching in sugarcane but only has a minor and variable effect.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Agriculture and Food Sciences
 
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Created: Thu, 03 Sep 2009, 19:22:21 EST by Mr Andrew Martlew on behalf of School of Agriculture and Food Sciences