Open AccessGenetic divergence among accessions of Manihot spp.
Author(s) -
Ana Paula Gomes da Silva,
Divan Soares da Silva,
Maílson Monteiro do Rêgo,
Alberício Pereira de Andrade,
Fleming Sena Campos,
Elizanilda Ramalho do Rêgo
Publication year - 2020
Publication title -
acta scientiarum. agronomy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.438
H-Index - 28
eISSN - 1807-8621
pISSN - 1679-9275
DOI - 10.4025/actasciagron.v42i1.44076
Subject(s) - upgma , mahalanobis distance , biology , genetic diversity , genetic divergence , botany , divergence (linguistics) , horticulture , evolutionary biology , genetic variation , mathematics , statistics , genetics , demography , population , sociology , gene , linguistics , philosophy
The aim of this study was to perform a morphological and morphoagronomic analysis of wild Manihot species from a Brazilian semiarid region for inclusion in the collection at the Center for Agricultural Sciences, Federal University of Paraíba. To characterize the 55 accessions, 12 quantitative and 18 qualitative descriptors were used. A dissimilarity matrix was generated by Mahalanobis generalized distance (D²), and clusters were identified by the UPGMA method. It was possible to verify the formation of 8 dissimilar groups based on morphological characters and 5 groups based on morphometric characters, indicating the presence of genetic diversity among accessions. The evaluated morphometric variable with the greatest relative contribution was the length between the central lobe. Based on the dissimilarity matrix, the accessions 16 x 48 were the most genetically distant accessions, followed by 47 x 49. The accessions 4 Monteiro, 16 Soledad, 38 Boa Vista, 3 Pedra Lavrada, 7 Junco, 10 Barra de Santa Rosa, 21 Monteiro, and 39 Junco are the most promising and can be used as parents in breeding programs for this forage species.