【摘 要】
：
六十年代我国矮秆水稻大面积推广,使单产出现了第一次飞跃,当时选用的早熟、高产、抗倒新品种主要是衍生自半矮秆品种矮仔占或矮脚南特的杂交后代。其后,通过对浙江省七十年
【机 构】
：
中国水稻研究所,中国水稻研究所,中国水稻研究所,中国水稻研究所,中国水稻研究所,中国水稻研究所
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六十年代我国矮秆水稻大面积推广,使单产出现了第一次飞跃,当时选用的早熟、高产、抗倒新品种主要是衍生自半矮秆品种矮仔占或矮脚南特的杂交后代。其后,通过对浙江省七十年代推广的第一批早籼稻品种的性状分析,发现这一时期矮秆品种的演变趋势是提高植株高度、每穗实粒数和结实率,降低剑叶叶面积和每丛有效穗数。千粒重在24.5—26.2克之间(个别品种属大粒类型,如珍龙13),谷草比达1∶1.2左右。
The large-scale popularization of dwarf rice in China in the 1960s resulted in the first leap in yields. At that time, the early-maturing, high-yielding and anti-lodging new varieties were mainly derived from the hybrid progenies of semi-dwarf varieties Aizai Zhan or Dang Nanai . Subsequently, the traits of the first indica rice varieties popularized in Zhejiang Province in the 1970s were analyzed. It was found that the evolution trend of dwarf varieties in this period was to increase plant height, grain number per panicle and seed setting rate, Area and number of ears per cluster. Thousand grain weight between 24.5-26.2 grams (individual varieties are large grain types, such as the Jane 13), straw ratio of about 1: 1.2.
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