Abstract:

‘Zhanggan 40’is a new male sterile hybrid variety. Its sterile line is M0105-7，maintainer line is 8513-1-2. Its female parent is the filial generation of sterile line M0105-7 × 8513-1-2 and its male parent is F07013-5. The width of leaf of the variety is 56.08 cm，there are 9–11 outer leaves，the waxiness is light，the head weight is about 1.6–2.4 kg，head height and head width is about 17.0 cm and 14.0 cm separately. The yield is about 75 000–85 500 kg · hm^-2. Round ball，center pole is 7.0 cm，2–3 mature outsourcing green leaves，root stock height is 3.0 cm. Tastes crisp and sweet，low taste spicy. Resistance to blastomere and bolting，suitable for planting in the open field in Jibei cold area in high altitude during spring and autumn.

Key words: cabbage, sterile line, hybrid, cultivar