1. Dep. of Genetics, ‘Luiz de Queiroz’ College of Agriculture Univ. of São Paulo São Paulo Brazil
2. Dep. of Animal and Poultry Sciences Virginia Polytechnic Institute and State Univ. Blacksburg VA 24061 USA
3. Quantitative Genetics and Biometrics Cluster International Rice Research Institute Los Baños Philippines
4. Center for Advanced Innovation in Agriculture Virginia Polytechnic Institute and State Univ. Blacksburg VA 24061 USA