一、垦稻3号的育成及其特点垦稻3号是本所1973年用外地引入的矮脚南特×无芒早沙粳的稳定后代作母本,用大雪作父本杂交育成的。母本是含有我国著名矮秆早籼“矮脚南特”血缘的粳型品系,在我地区表现对稻瘟病高抗、株矮秆强、穗大粒大(千粒重28.3克),但成熟期极晚。父本大雪是日本粳稻,千粒重27克,在我地直播表现中晚熟、耐冷性较强、丰产性较好。垦稻3号除熟期超亲偏早、粒重超亲偏高外,还较好地组合了双亲的主要优良性状,是一个在直播条件下表现突出的新品种。其主要特征特性(如表1)。 First, Kening 3 bred and its characteristics Kenyon 3 is the Institute in 1973 with the introduction of the field of the short leg Nantes × non-maize early sand japonica stable offspring as the female parent, with snow as father crossed breeding. The female parent is a Japonica line containing the blood line of “Dwarf Nanant”, a famous dwarf indica rice in our country. It is highly resistant to rice blast in my area, with strong dwarf stalks and big spike (28.3 g in 1000 grain weight) late. Father snow is Japan japonica rice, grain weight 27 grams, live late in my performance, strong cold tolerance, good yield. In addition to the early maturity of Kenyao 3 early, overweight and high grain weight, but also a better combination of the parents of the main fine traits, is a live under the conditions of outstanding performance of new varieties. Its main characteristics (as shown in Table 1).