Genetic diversity in Australian Cedar genotypes selected by mixed models

Ciência e Agrotecnologia

Rulfe Tavares¹  Alexandre Pio Viana¹  Deborah Guerra Barroso¹  Antonio Teixeira Do Amaral Júnior¹ 

[1],Universidade Estadual do Norte Fluminense Darcy Ribeiro Centro de Ciências e Tecnologias Agropecuárias Campos dos Goytacazes RJ ,Brasil

关键词: Molecular markers;    genetic values;    woody plant;    Marcadores moleculares;    valores genéticos;    planta lenhosa;   

DOI  :  10.1590/S1413-70542012000200005

来源: SciELO

【 摘 要 】

The increasing demand for raw material for multiple uses of forest products and by-products has attracted the interest for fast growing species, such as the Australian Cedar (Toona ciliata), which presents high productive and economic potential. The present work aimed at estimating genetic diversity by DNA markers and morphological traits supported for the mixed models. The following traits were measured and genotypes were sampled randomly in different areas: diameter at breast height, height, cylindrical volume, diameter, distance between nodes and crown diameter. Twelve RAPD primers were used and generated a total of 91 marks, 82 of which were polymorphic. The high percentage of polymorphic markers, 90.10%, demonstrated that discrimination in this species is efficient, but it yet little studied, for this case we can find the extent of the genetic basis for the application of technical improvement. The assessment of genetic diversity by the UPGMA method using the binary and morphological data provided the expression of genetic dissimilarities among the accessions evaluated, optimizing the perception of this divergence. The use of mixed models was efficient to assess combined genetic diversity to optimize the selection of genotypes with divergent genetic values for diameter at breast height.

【 授权许可】

CC BY   
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