优质抗病青菜新品种“小叶青”的选育

STUDIES ON BREEDING FOR HIGH QUALITY AND DISEASE RESISTANCE OF A NEW VARIETY "XIAO YEQING" IN NONHEADING CHINESE CABBAGE

于１９８６～１９９４年，利用现有青菜种质资源，通过杂交实现基因重组，并经连续多代自交纯化，选育出两个高代自交系，自交系间再杂交复配育成了一个新品种“小叶青”。每一自交子代及最终配制的组合均严格进行室内、田间“三抗”性（抗ＴｕＭＶ、霜霉病和黑斑病）鉴定。所育成的“小叶青”抗病性强，商品性状与市场要求相吻合，产值比“矮抗青”提高２０％左右。

This paper shows that a new variety'Xiaoyeqing'was bred by hybridizing of two self-lines which were obtained by high generations' self-pollination purification using existing materials of nonheading Chinese Cabbage during 1986～ 1994. The disease resistance identification including TuMV, downy mildew and black spot disease must be tested indoors and outdoors among all of the self-pollinated descendents and hybridized combinations. The new variety 'Xiaoyeqing' has such advantages as fine shape, short petiole, high disease-resistance. It accords with the market demands and its output value is 20 percent higher than that for 'Aikangqing'.