期刊
GENETICS AND MOLECULAR RESEARCH
卷 7, 期 4, 页码 1289-1297出版社
FUNPEC-EDITORA
DOI: 10.4238/vol7-4gmr526
关键词
Solanum lycopersicum; Gower dissimilarity; Morphoagronomic descriptors; Molecular markers
资金
- FAPERJ (Fundacao Carlos Chagas Filho de Amparo a Pesquisa do Estado do Rio de Janeiro), Brazil
Use of multivariate statistical algorithms is considered an important strategy to quantify genetic similarity. Local varieties and traditional ( heirloom) seeds of genotypes are key sources of genetic variation. The Universidade Estadual do Norte Fluminense (UENF), Rio de Janeiro, Brazil, has a tomato gene bank with accessions that have been maintained for more than 40 years. We compared various algorithms to estimate genetic distances and quantify the genetic divergence of 40 tomato accessions of this collection, based on separate and joint analyses of discrete and continuous variables. Differences in continuous variables and discrete and joint analyses were calculated based on the Mahalanobis, Cole Rodgers and Gower distances. Although opinions differ regarding the validity of joint analysis of discrete and continuous data, we found that analyzing a larger number of variables together is viable and can help in the discrimination of accessions; the information that is generated is relevant and promising for both, the accessions conservation and the use of genetic resources in breeding programs.
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