论文部分内容阅读
为了利用甘薯的近缘野生种所具有的抗病虫和适应性强等特性,日本自1956年以来,从甘薯的原产地引进了200多个类型的甘薯属,其中包括抗根腐线虫和根瘤线虫能力强的以及抗旱的野生种,并将这些野生种应用到育种上。他们利用甘薯的结薯性和野生种的多倍性,通过杂交于1971年培育成功四倍体甘薯。1972年获得13个株系,1973年四倍体甘薯再次相互
In order to make use of the characteristics of pest resistance and adaptability of the wild relatives of sweet potato, more than 200 types of sweet potato genus have been introduced from the origin of sweet potato in China since 1956, including the resistance of root rot nematodes and nodules Nematode-competent and drought-resistant wild species and apply these wild species to breeding. They used the sweet potato tuberous and polyploidy of wild species to cultivate successful tetraploid sweet potatoes by crossing in 1971. In 1972, 13 lines were obtained. In 1973, tetraploid sweet potato again interacted with each other