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Updated: May 6, 2026

Multipronged Phenotyping Approaches to Characterize Sugarcane Root Systems
Published on: August 17, 2022
Chromosome assortment in Saccharum.
S M Al-Janabi1, R J Honeycutt, B W Sobral
1California Institute of Biological Research, 11099 N. Torrey Pines Rd., Suite 300, 92037, La Jolla, CA, USA.
Polysomic inheritance was not observed in Saccharum officinarum and Saccharum robustum crosses, differing from Saccharum spontaneum. This finding impacts sugarcane evolution and breeding strategies.
Area of Science:
- Plant genetics
- Molecular biology
- Evolutionary biology
Background:
- Saccharum spontaneum exhibits random chromosome pairing.
- Understanding inheritance patterns in Saccharum is crucial for breeding.
Purpose of the Study:
- Investigate polysomic inheritance in a typical biparental cross of Saccharum.
- Analyze chromosome pairing and assortment in Saccharum officinarum and Saccharum robustum.
Main Methods:
- Arbitrarily primed PCR used to analyze 738 loci in S. officinarum and 720 loci in S. robustum.
- Single-dose polymorphisms identified and linkage analysis performed.
- Genetic mapping hypotheses generated for both genomes.
Main Results:
- Fifty single-dose polymorphisms in S. officinarum and 33 in S. robustum identified.
- Linkage analysis revealed both repulsion and coupling phases.
- S. officinarum showed 7 linkage groups; S. robustum showed 5 linkage groups.
Conclusions:
- Complete polysomic inheritance was not observed in the studied S. officinarum and S. robustum.
- Chromosomal behavior differs from that in S. spontaneum.
- Findings have implications for sugarcane evolution and breeding.
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