Caracterización citogenética de nuevos clones silvestres del complejo Saccharum
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Abstract
chromosomal count of new wild clones of Saccharum complex
was performed and Giemsa C-banding technique was adapted
to develop the use of polymorphism patterns as possible
chromosome markers. Clones, cytogenetically characterized
through these techniques, constituted new accessions
representative of Erianthus and Saccharum genera. Twelve
chromosomic patterns were revealed among the C-banding
and ten of these presented bands at different positions
lengthwise the chromosome. Five chromosomic patterns
separated three clonal groups: Erianthus, Saccharum and
hybrid clones. To determine the hybrid origin of ECL 5-4,
ECL 1-29 and ECL 1-31 clones, a Factor Analysis of
Correspondence (FAC) was performed. To confirm the
discriminative value of the five patterns associated to clonal
groups and their within-group uniformity, a test of
independence (P<0.01) was used. Effectiveness of use of
possible cytogenetical markers in the taxonomic identification
was demonstrated.
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