1Key Laboratory of Genetics and Germplasm Innovation of Tropical Special Forest Trees and Ornamental Plants, Ministry of Education, College of Forestry, Hainan University, Haikou 570228, P. R. China; 2Department of Agronomy, University of Agriculture, Faisalabad 38040, Pakistan
3Department of Botany, University of Education, Lahore, Faisalabad-Campus, Faisalabad, 38000 Pakistan
4State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, Zhejiang, PR China
5Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Danzhou Hainan 571737, China.