Caracteres morfoagronômicos e anatômicos foliares em genótipos de Coffea canephora

Ciencia Rural

article

Larícia Olária Emerick Silva¹  Raquel Schmidt¹  Rafael Nunes de Almeida²  Rodrigo Barbosa Braga Feitoza²  Maura da Cunha²  Fábio Luiz Partelli³ 

[1] Universidade Federal do Espírito Santo;Universidade Estadual do Norte Fluminense Darcy Ribeiro;Universidade Federal Espírito Santo

关键词: Conilon coffee;    Electron Microscopy;    Leaf Microscopy;    Plant breeding;   

DOI  :  10.1590/0103-8478cr20220005

学科分类：农业科学（综合）

来源: Universidade Federal de Santa Maria * Centro de Ciencias Rurais

【 摘 要 】

Genetic variability is the basis for coffee genetic breeding. This study evaluated the potential of leaf anatomy and morpho-agronomic traits in studies of genetic variability in C. canephoracultivars. Ten genotypes were distributed in randomized block designs with three replicates. Significant differences among genotypes were detected by F-test (P < 0.05) for 13 of 15 evaluated traits. These results evidenced the heterogeneity of the studied cultivars, which is essential in composition of genetic basis in breeding programs. The Scott-Knott test detected variability among genotypes, grouped into up to four mean groups. Leaf anatomy traits presented the largest variations. Five out of seven leaf anatomy traits presented heritability higher than 80%, with emphasis on stomatal density (95.69%) and stomatal pore length (92.72%). Positive correlations were observed among morpho-agronomic and anatomic traits. Cluster analysis used the Mahalanobis general distance (D2) as a measure of genetic dissimilarity and divided the genotypes into two distinct groups. The inclusion of leaf anatomic traits to characterize C. canephoragenotypes may assist plant breeders with better genetic discrimination and with greater security in plant selection when composing cultivars.

【 授权许可】

Unknown