为了培育抗寒水稻品种,我们从改造物种的遗传抗性入手,自1971年以来,用我区具有特殊抗寒力的桂平野生稻为亲本,分别与广选早、陆川大粒杂交,然后再进行组合间复交和姐妹系回交,经过多次早晚两季连续选育和抗寒锻炼,初步育成越冬青。由于这个品种引入了野生稻露地越冬的特性,具有宿根带绿越冬的性能,故命名“越冬青”。经过几年品种抗寒鉴定,越冬青抗寒力强,产量稳定。苗期在低温侵害下,保苗率达80—95%以上;即使在秧苗“断奶”后期受到危害,恢复也较快。对照种广选8号、珍珠矮保苗率不到25%,引进品种科 In order to cultivate cold-resistant rice varieties, we started with rebuilding the genetic resistance of the species. Since 1971, we used the Guiping wild rice with special cold-hardiness in our district as the parent and crossed with the widely selected early and Luchuan large grains respectively Compound backfired and sister back to the portfolio, after many consecutive nights of morning and evening seasons and cold resistance training, the initial breeding more holly. Since this species introduced the characteristic of overwintering wild rice in open fields, it has the property of perennial green belt overwintering, hence the name “overwinter green”. After several years of cold-resistant varieties identification, winter cold strong, stable output. Seedlings in the low temperature damage, the seedling rate of 80-95% or more; even in the late seedlings “weaning” harmed, faster recovery. On the 8th variety of broad control, pearl short seedlings less than 25% of seedlings, the introduction of varieties of subjects