caa a22 4500 477135447 CHVBK 20180405111716.0 cr unu---uuuuu 170330e19970501xx s 000 0 eng 10.1023/A:1002993415875 doi (NATIONALLICENCE)springer-10.1023/A:1002993415875 Genetic differentiation among Ecuadorian Theobroma cacao L. accessions using DNA and morphological analyses [Elektronische Daten] [Estelle Lerceteau, Sophie Flipo, James Quiroz, Jorge Soria, Vincent Pétiard, Dominique Crouzilat] The quality of Ecuadorian cacao is presently threatened by the introduction of hybrid material. An estimation of genetic diversity in Ecuador is required in order to avoid the loss of fine flavored cocoa. Genetic variability amongst 60 Ecuadorian genotypes of Theobroma cacao has been evaluated using molecular and phenotypic markers. The two distance matrices derived from the molecular and phenotypic data were found to be correlated (R2 = 0.5). Dynamic clustering analyses classified the genotypes in two or three groups depending on the markers used. The genotypes coming from Sebasti{àn Arteaga (SA) and Balao Chico (BCH) plantations appeared related to each other suggesting a common genetic origin. They also may be considered as a distinct group with high RFLP homozygosity. The EETP (Estací}on Experimental Tropical Pichilingue of Ecuador) collection was comprised of more variable genotypes possessing variable heterozygosity levels. The low heterozygous genotypes may be genetically related to SA and BCH trees, whereas the higher heterozygous genotypes may have resulted from hybridizations between original Nacional material of Ecuador and genotypes imported from Trinidad at the beginning of the century. Thus genetic introgression may have occurred giving rise to a range of variation between Nacional and hybrid forms. Kluwer Academic Publishers, 1997 cacao nationallicence DNA markers nationallicence morphological markers nationallicence Theobroma cacao nationallicence Ecuador nationallicence Lerceteau Estelle Centre R&D Nestl{é, 101 avenue Gustave Eiffel, Notre Dame d'Oé, BP 9716, 37097, Tours cedex 2, France aut Flipo Sophie Centre R&D Nestl{é, 101 avenue Gustave Eiffel, Notre Dame d'Oé, BP 9716, 37097, Tours cedex 2, France aut Quiroz James Instituto Nacional Investigaciones Agropecuarias, Ecuador aut Soria Jorge IDEA, Quito, Ecuador aut Pétiard Vincent Centre R&D Nestl{é, 101 avenue Gustave Eiffel, Notre Dame d'Oé, BP 9716, 37097, Tours cedex 2, France aut Crouzilat Dominique Centre R&D Nestl{é, 101 avenue Gustave Eiffel, Notre Dame d'Oé, BP 9716, 37097, Tours cedex 2, France aut Euphytica Kluwer Academic Publishers 95/1(1997-05-01), 77-87 0014-2336 95:1<77 1997 95 10681 https://doi.org/10.1023/A:1002993415875 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1002993415875 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lerceteau Estelle Centre R&D Nestl{é, 101 avenue Gustave Eiffel, Notre Dame d'Oé, BP 9716, 37097, Tours cedex 2, France aut NATIONALLICENCE 700 1- Flipo Sophie Centre R&D Nestl{é, 101 avenue Gustave Eiffel, Notre Dame d'Oé, BP 9716, 37097, Tours cedex 2, France aut NATIONALLICENCE 700 1- Quiroz James Instituto Nacional Investigaciones Agropecuarias, Ecuador aut NATIONALLICENCE 700 1- Soria Jorge IDEA, Quito, Ecuador aut NATIONALLICENCE 700 1- Pétiard Vincent Centre R&D Nestl{é, 101 avenue Gustave Eiffel, Notre Dame d'Oé, BP 9716, 37097, Tours cedex 2, France aut NATIONALLICENCE 700 1- Crouzilat Dominique Centre R&D Nestl{é, 101 avenue Gustave Eiffel, Notre Dame d'Oé, BP 9716, 37097, Tours cedex 2, France aut NATIONALLICENCE 773 0- Euphytica Kluwer Academic Publishers 95/1(1997-05-01), 77-87 0014-2336 95:1<77 1997 95 10681 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer