Analysis of genomic and functional RFLP derived markers associated with sucrose content, fiber and yield QTLs in a sugarcane (Saccharum spp.) commercial cross

Autor(es)

Pinto, L. R. ^[1] ; Garcia, A. A. F. ^[2] ; Pastina, M. M. ^[2] ; Teixeira, L. H. M. ^[3] ; Bressiani, J. A. ^[4] ; Ulian, E. C. ^[5] ; Bidoia, M. A. P. ^[1] ; Souza, A. P. ^[3]

Afiliação do(s) autor(es)

^[1] IAC APTA, Ctr Avancado Pesquisa Tecnol Agronegocio Cana, BR-14001970 Ribeirao Preto, SP - Brazil

^[2] Univ Sao Paulo, Dept Genet, ESALQ, BR-13400970 Piracicaba, SP - Brazil

^[3] Univ Estadual Campinas, CBMEG, Depto Genet & Evolucao, BR-13083875 Campinas, SP - Brazil

^[4] Canavialis, BR-13069 Campinas, SP - Brazil

^[5] Monsanto Brasil Ltda, BR-04571000 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: EUPHYTICA; v. 172, n. 3, p. 313-327, APR 2010.
• Citações Web of Science: 23

Resumo

Expressed sequence tags derived markers have a great potential to be used in functional map construction and QTL tagging. In the present work, sugarcane genomic probes and expressed sequence tags having homology to genes, mostly involved in carbohydrate metabolism were used in RFLP assays to identify putative QTLs as well as their epistatic interactions for fiber content, cane yield, pol and tones of sugar per hectare, at two crop cycles in a progeny derived from a bi-parental cross of sugarcane elite materials. A hundred and twenty marker trait associations were found, of which 26 at both crop cycle and 32 only at first ratoon cane. A sucrose synthase derived marker was associated with a putative QTL having a high negative effect on cane yield and also with a QTL having a positive effect on Pol at both crop cycles. Fifty digenic epistatic marker interactions were identified for the four traits evaluated. Of these, only two were observed at both crop cycles. (AU)

• Processo FAPESP: 02/01167-1 - Desenvolvimento de marcadores moleculares a partir de ESTs de cana-de-acúcar para seleção de características economicamente importantes
• Beneficiário: Anete Pereira de Souza
• Linha de fomento: Auxílio à Pesquisa - Parceria para Inovação Tecnológica - PITE