| Somaclonal variation in Coffea arabica: effects of genotype and embryogenic cell suspension age on frequency and phenotype of variants. | |
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MedLine Citation:
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PMID: 12642244 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We determined how age of embryogenic cell suspensions affects somaclonal variation in five F1 hybrids of Coffea arabica L. Batches of plants were produced either directly from embryogenic callus, or after 3, 6, 9 and 12 months of embryogenic cell suspension culture. Seven phenotypic variants were characterized. Based on vigor and productivity of the regenerated plants, we classified the variants in order of increasing severity of physiological disorders as: Juvenile leaf color, Giant, Dwarf, Thick leaf (Bullata), Variegata, Angustifolia, and Multi-stem. The Dwarf, Angustifolia and Multi-stem variants were the most frequent among the regenerated plants (1.4, 4.8 and 2.9%, respectively). The frequency (f) of variants increased exponentially with the age (t) of the embryogenic suspension, in accordance with the function f = 0.99e(0.267t). For all genotypes, somaclonal variation was low (1.3%) in plants produced from embryogenic callus or 3-month-old cell suspensions and increased in frequency with increasing suspension age (6, 10 and 25% in plants produced from cell suspensions aged 6, 9 and 12 months, respectively). Large differences in somaclonal variation among genotypes were found only in plants produced from 12-month-old cell suspensions. For two genotypes, the oldest suspensions produced a majority of somaclonal variants (80-90%), whereas somaclonal variation ranged between 8 and 18% in the other genotypes. Cell suspension age and genotype also affected the type of variant produced. The severity of somaclonal variations increased with cell suspension age. For all genotypes combined, the Angustifolia variant was the most common. The other somaclonal variations were specific to certain genotypes or distributed randomly among the genotypes. |
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Authors:
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H Etienne; B Bertrand |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Tree physiology Volume: 23 ISSN: 0829-318X ISO Abbreviation: Tree Physiol. Publication Date: 2003 Apr |
Date Detail:
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Created Date: 2003-03-18 Completed Date: 2004-07-16 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 100955338 Medline TA: Tree Physiol Country: Canada |
Other Details:
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Languages: eng Pagination: 419-26 Citation Subset: IM |
Affiliation:
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Laboratorio de Biotecnología, CATIE, Apartado 11, 7170 Turrialba, Costa Rica. herve.etienne@cirad.fr |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Cells, Cultured Coffea / genetics* Genetic Variation / genetics Genotype Phenotype Seeds / genetics* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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