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蔬菜作物的良种繁育与大田作物相比,主要有两大特点:一是繁殖方法多。有有性繁殖和无性繁殖两大类。有性繁殖中又有自花授粉、常异花授粉和异花授粉三种。无性繁殖也有根蘖、块茎、块根和插条等多种方法。二是栽培与采种的矛盾较大。大田作物通过一般栽培就可获得种子,蔬菜作物有的要经过贮藏或越冬第二年才能采种,有的要经过老熟。加上栽培管理和收藏不当,造成品种较为普遍地混杂退化。尤其是常异花授粉和异花授粉蔬菜更为严重。比如萝卜目
Compared with field crops, breeding of vegetable crops has two main characteristics: First, there are many breeding methods. There are two major categories of sexual reproduction and asexual reproduction. Sexual reproduction and self-pollination, often cross-pollination and cross-pollination three. Asexual reproduction also has a variety of methods such as root tillers, tubers, roots and cuttings. Second, cultivation and planting a larger conflict. Field crops can be obtained through the general cultivation of seeds, vegetables and some crops to go through storage or wintering the second year to seed, and some have to go through ripe. Coupled with cultivation management and improper collection, resulting in more common varieties of mixed degradation. In particular, often cross-pollination and cross-pollinated vegetables are more serious. Such as radish head