Joint analysis of phenotypic and molecular diversity provides new insights on the genetic variability of the brazilian physic nut germplasm bank

Genetics and Molecular Biology

Alexandre Alonso Alves²  Leonardo Lopes Bhering¹  Tatiana Barbosa Rosado²  Bruno Galvêas Laviola²  Eduardo Fernandes Formighieri²  Cosme Damião Cruz¹ 

[1] ,Embrapa AgroenergiaBrasilia DF ,Brazil

关键词: molecular variability;    Jatropha curcas L.;    phenotypic variability;   

DOI  :  10.1590/S1415-47572013005000033

来源: SciELO

【 摘 要 】

The genetic variability of the Brazilian physic nut (Jatropha curcas) germplasm bank (117 accessions) was assessed using a combination of phenotypic and molecular data. The joint dissimilarity matrix showed moderate correlation with the original matrices of phenotypic and molecular data. However, the correlation between the phenotypic dissimilarity matrix and the genotypic dissimilarity matrix was low. This finding indicated that molecular markers (RAPD and SSR) did not adequately sample the genomic regions that were relevant for phenotypic differentiation of the accessions. The dissimilarity values of the joint dissimilarity matrix were used to measure phenotypic + molecular diversity. This diversity varied from 0 to 1.29 among the 117 accessions, with an average dissimilarity among genotypes of 0.51. Joint analysis of phenotypic and molecular diversity indicated that the genetic diversity of the physic nut germplasm was 156% and 64% higher than the diversity estimated from phenotypic and molecular data, respectively. These results show that Jatropha genetic variability in Brazil is not as limited as previously thought.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License