Estudo da compatibilidade entre clones de Coffea canephora por meio de marcadores SNPs
Data
2018-03-01
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Editor
Universidade Federal de Lavras
Resumo
Coffea canephora é uma planta perene, pertencente à família Rubiaceae, diploide (2n = 2 × = 22), alógama, que apresenta alta variabilidade genética, e por consequência, sua lavoura é formada a partir de clones. No cenário mundial, o café é uma das commodities agrícolas mais importantes e o Brasil é o maior produtor, com cerca de 30% da produção mundial. C. canephora corresponde a 37% da produção mundial e 24% da brasileira. A espécie C. canephora apresenta autoincompatibilidade do tipo gametofítica, onde o grão de pólen não deve compartilhar o mesmo alelo da planta receptora. O presente trabalho estudou a compatibilidade existente entre 13 clones de C. canephora, denominados CCEs, por meio de marcadores SNPs. A metodologia utilizada foi eficiente em reconstruir o pedigree de progênies de 10 clones CCE, identificando corretamente o parental materno na quase totalidade das plantas analisadas. Os resultados obtidos, também sugerem uma similaridade genotípica de 99,8 % entre os clones CCE04 e CCE11, sugerindo que essas plantas podem ser idênticas. As análises de parentais realizadas com o programa Cervus, mostrou-se eficiente em inferir sobre a compatibilidade entre os clones testados, no qual o clone CCE07 se mostrou compatível com todos os outros CCEs testados, o que poderia indicar um alto potencial produtivo deste clone, o que foi confirmado com dados experimentais.
Conilon coffee belongs to the Coffea canephora species, which is a diploid (2n = 2 × = 22), perennial, allogamous plant with a high genetic variability. Accordingly, the production of clonal varieties is of great value for the success of crop. Coffee is one of the most important agricultural commodities in the world. Brazil is the largest producer, responding by 30% of the world production. C. canephora comprises 37% of the world production and 24% of the Brazilian coffee production. C. canephora has gametophytic self-incompatibility, when haploid pollen matches one of the same allele present in the diploid style causing pollen rejection. Therefore, the objective of this work was to study the compatibility between 13 clones of C. canephora, denominated CCEs, by SNPs markers. Our methodology was efficient to reconstruct the pedigree of 10 CCEs progenies, identifying correctly the maternal parent in most analyzed plants for all CCEs, with the use of SNPs markers. Results have also shown a genotypic similarity of 99.8% between CCE04 and CCE11 clones, suggesting that these plants may be identical. Parental analyzes performed with the Cervus Software proved to be efficient to inferring the compatibility between all tested clones, and the CCE07 clone was compatible with all other CCEs tested, which could indicate a high productive potential for this clone, which was experimentally confirmed.
Conilon coffee belongs to the Coffea canephora species, which is a diploid (2n = 2 × = 22), perennial, allogamous plant with a high genetic variability. Accordingly, the production of clonal varieties is of great value for the success of crop. Coffee is one of the most important agricultural commodities in the world. Brazil is the largest producer, responding by 30% of the world production. C. canephora comprises 37% of the world production and 24% of the Brazilian coffee production. C. canephora has gametophytic self-incompatibility, when haploid pollen matches one of the same allele present in the diploid style causing pollen rejection. Therefore, the objective of this work was to study the compatibility between 13 clones of C. canephora, denominated CCEs, by SNPs markers. Our methodology was efficient to reconstruct the pedigree of 10 CCEs progenies, identifying correctly the maternal parent in most analyzed plants for all CCEs, with the use of SNPs markers. Results have also shown a genotypic similarity of 99.8% between CCE04 and CCE11 clones, suggesting that these plants may be identical. Parental analyzes performed with the Cervus Software proved to be efficient to inferring the compatibility between all tested clones, and the CCE07 clone was compatible with all other CCEs tested, which could indicate a high productive potential for this clone, which was experimentally confirmed.
Descrição
Dissertação de Mestrado defendida na Universidade Federal de Lavras
Palavras-chave
SNPs, Compatibilidade
Citação
MATTOS, N. G. Estudo da compatibilidade entre clones de Coffea canephora por meio de marcadores SNPs. 2018. 70 f. Dissertação (Mestrado em Biotecnologia Vegetal) - Universidade Federal de Lavras, Lavras. 2018.