Genetic variability among sugarcane genotypes based on polymorphisms in sucrose metabolism and drought tolerance genes |
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| Authors: | Silvana Creste Klaus A G Accoroni Luciana R Pinto Roland Vencovsky Marcos A Gimenes Mauro A Xavier Marcos G A Landell |
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| Institution: | 1.Centro de Cana,Instituto Agron?mico de Campinas,Ribeir?o Preto,Brazil;2.Departamento de Genética, Escola Superior de Agricultura “Luiz de Queiroz”,Universidade de S?o Paulo,Piracicaba,Brazil;3.Embrapa Recursos Genéticos e Biotecnologia (CENARGEN),Brasília,Brazil |
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| Abstract: | Target region amplification polymorphism (TRAP) markers were used to estimate the genetic similarity (GS) among 53 sugarcane
varieties and five species of the Saccharum complex. Seven fixed primers designed from candidate genes involved in sucrose metabolism and three from those involved in
drought response metabolism were used in combination with three arbitrary primers. The clustering of the genotypes for sucrose
metabolism and drought response were similar, but the GS based on Jaccard’s coefficient changed. The GS based on polymorphism
in sucrose genes estimated in a set of 46 Brazilian varieties, all of which belong to the three Brazilian breeding programs,
ranged from 0.52 to 0.9, and that based on drought data ranged from 0.44 to 0.95. The results suggest that genetic variability
in the evaluated genes was lower in the sucrose metabolism genes than in the drought response metabolism ones. |
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