| Full text | |
| Author(s): |
Pastina, M. M.
[1]
;
Malosetti, M.
[2]
;
Gazaffi, R.
[1]
;
Mollinari, M.
[1]
;
Margarido, G. R. A.
[1]
;
Oliveira, K. M.
[3]
;
Pinto, L. R.
[4]
;
Souza, A. P.
[5]
;
van Eeuwijk, F. A.
[2]
;
Garcia, A. A. F.
[1]
Total Authors: 10
|
| Affiliation: | [1] Univ Sao Paulo, Dept Genet, Escola Super Agr Luiz de Queiroz ESALQ, BR-13400970 Piracicaba, SP - Brazil
[2] Wageningen Univ, NL-6700 AC Wageningen - Netherlands
[3] Ctr Tecnol Canavieira CTC, BR-13400970 Piracicaba, SP - Brazil
[4] Ctr Avancado Pesquisa Tecnol Agronegocio Cana, BR-14001970 Ribeirao Preto, SP - Brazil
[5] Univ Estadual Campinas UNICAMP, CBMEG, Dept Genet & Evolucao, BR-13083875 Campinas, SP - Brazil
Total Affiliations: 5
|
| Document type: | Journal article |
| Source: | THEORETICAL AND APPLIED GENETICS; v. 124, n. 5, p. 835-849, MAR 2012. |
| Web of Science Citations: | 38 |
| Abstract | |
Sugarcane-breeding programs take at least 12 years to develop new commercial cultivars. Molecular markers offer a possibility to study the genetic architecture of quantitative traits in sugarcane, and they may be used in marker-assisted selection to speed up artificial selection. Although the performance of sugarcane progenies in breeding programs are commonly evaluated across a range of locations and harvest years, many of the QTL detection methods ignore two- and three-way interactions between QTL, harvest, and location. In this work, a strategy for QTL detection in multi-harvest-location trial data, based on interval mapping and mixed models, is proposed and applied to map QTL effects on a segregating progeny from a biparental cross of pre-commercial Brazilian cultivars, evaluated at two locations and three consecutive harvest years for cane yield (tonnes per hectare), sugar yield (tonnes per hectare), fiber percent, and sucrose content. In the mixed model, we have included appropriate (co)variance structures for modeling heterogeneity and correlation of genetic effects and non-genetic residual effects. Forty-six QTLs were found: 13 QTLs for cane yield, 14 for sugar yield, 11 for fiber percent, and 8 for sucrose content. In addition, QTL by harvest, QTL by location, and QTL by harvest by location interaction effects were significant for all evaluated traits (30 QTLs showed some interaction, and 16 none). Our results contribute to a better understanding of the genetic architecture of complex traits related to biomass production and sucrose content in sugarcane. (AU) | |
| FAPESP's process: | 08/52197-4 - Genomic-assisted breeding of sugarcane: using molecular markers for understanding the genetic architecture of quantitative traits and to implement marker assisted selection |
| Grantee: | Anete Pereira de Souza |
| Support Opportunities: | Program for Research on Bioenergy (BIOEN) - Thematic Grants |
| FAPESP's process: | 10/00083-5 - ASSOCIATION MAPPING, LINKAGE DISEQUILIBRIUM AND POPULATION STRUCTURE IN SUGARCANE |
| Grantee: | Maria Marta Pastina |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 08/57908-6 - National Institute of Science and Technology of Bioethanol |
| Grantee: | Marcos Silveira Buckeridge |
| Support Opportunities: | Program for Research on Bioenergy (BIOEN) - Thematic Grants |