With cytoplasmic male sterility (CMS) line
A05-1-3-15 as female parent and self-compatible line Heyin-1 as male parent,
Qingnong55 is a new early-maturing crack-tolerant (50-55 days from
transplantation to harvest) cabbage variety.
Head crack rate of the plant is less than
0.5% within 15 days after its maturity. The outer leaves are about 12 pieces
and shining green in color. Its head is round and about 16-18 cm in length. The
inner leaves are light yellow in color and taste sweet and crispy. Its central
axis is extremely short, about 1/2 of the head height. Moreover, this variety
is resistant to black rot and tolerant to downy mildew.
Regarding its output, each 667 m2 can yield
4,500 kg of fruit for open field in autumn and over 5,000 for simple plastic
tunnels in spring (about 1.2-1.4 kg in weight in initial harvest period per
head). This variety is suitable to be planted in northern China in spring in
reserve land and in autumn in open fields.
*News from a paper titled A New
Crack-tolerant Cabbage Variety—‘Qingnong 55’ delivered by researchers Sun
Zhaohui, Chen Liping and Cheng Fei from the School of Horticulture of the
Qingdao Agricultural University and Sun Lingqiang and Sun Xuliang from the
Qingdao Seed Management Station.
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