[1] Univ Texas Austin, Inst Cellular & Mol Biol, Austin, TX 78712 USA
[2] Univ Texas Austin, Ctr Computat Biol & Bioinformat, Austin, TX 78712 USA
[3] Nanjing Agr Univ, Natl Lab Plant Genet & Germplasm Enhancement, Nanjing 210095, Jiangsu, Peoples R China