关键词: 白菜, 耐热, 杂种一代, 品种

Abstract:

‘Xinxiaqing 5’is a new heat-resistant pak-choi hybrid by crossing two self-incompatible lines‘323-147’and‘309-505’with homozygous genotype and excellent traits. The plant is erect with compact plant type and vigorous growth,with glossy green outer leaves and wide-long green petiole. It showed heat resistance，disease resistance（such as virus and downy mildew disease）and high quality. It could be harvested at 15–40 days after seeding and its average yield could be up to 25 350 kg · hm-2 at 35 days after seeding. It is suitable for cultivation in Shanghai and the similar ecological conditions in Yangtze River middle and lower reaches in summer and early autumn.

Key words: pak-choi, heat-resistant, hybrid, cultivar