Genetic analysis of agronomic traits in a cross between sugarcane (Saccharum officinarum L.) and its presumed progenitor (S. robustum Brandes & Jesw. ex Grassl)

• Published in: Molecular breeding 1995-01, Vol.1 (4), p.355-363
• Main Authors: Sills, G.R, Bridges, W
• Format: Article
• Language: English
• Subjects: agronomic traits; digenic epistatic interactions; epistasis; genetic correlation; genetic markers; genetic variation; growth; heritability; interspecific hybridization; linkage (genetics); linkage groups; loci; phenotypic correlation; phenotypic variation; plant development; quantitative traits; random amplified polymorphic DNA technique; Saccharum officinarum; Saccharum robustum; stems
• ISSN: 1380-3743; 1572-9788
• DOI: 10.1007/BF01248413

Saccharum robustum Brandes & Jesw. ex Grassl has been suggested as the immediate progenitor species of cultivated sugarcane (S. officinarum L.) [4]. Chromosome pairing and assortment in these two species were previously studied by genetic analysis of single-dose DNA markers in parents in and 44 F1 progeny of a cross between euploid, meiotically regular 2n 80 S. officinarum 'LA Purple' and S. robustum 'Mol 5829' [2]. This same population was subsequently clonally propagated and evaluated in replicated trials for quantitative traits important to sugarcane breeders. Numbers of stalks, tasseled stalks, and stalks with smut, and the average diameter of two stalks were determined one day prior to harvest. At harvest, plant material from each plot was weighed and evaluated for pol (sucrose content) and fiber percentages. Clones were significantly different (P< 0.01) for all traits analyzed. Associations of 83 single-dose arbitrarily primed PCR genetic markers with quantitative trait loci (QTL) of recorded traits was determined by single-factor ANOVA, and multiple regression. QTL analysis revealed markers significantly (P