Affiliation: | 1. Department of Vegetable Science, College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, PR. China;Guangzhou Academy of Agricultural Sciences, Guangzhou 510308, P.R.China 2. Department of Vegetable Science, College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, PR. China 3. Faculty of Life Sciences, Department of Agriculture and Ecology, University of Copenhagen, H~jbakkegaard Alle 13, 2630 Taastrup,Denmark |