为了继续改进现有早稻早熟品种的丰产性及抗病性,我院于1965年冬季用“二九矮7号”为母本与“青小金早”杂交,经过三年多的多代选拔、二年的鉴定,于1969年春季选育出比“矮南早1号”株型丰产性状有所改进,抗稻热病、纹枯病能力有所提高的早籼新品系“二九青”。为了进一步鉴定“二九青”的生产性能,从1969年春季开 In order to continue to improve the high yield and disease resistance of the early rice varieties with early maturity, our hospital in the winter of 1965 with the “two nine short” 7 as the female and “green young early” hybrid, after more than three years of multi-generation selection, Two years of appraisal, in the spring of 1969, a new early indica rice line “29 Jiqing”, which was improved more than that of “Dainannan 1” strain, had improved resistance to rice fever and sheath blight, . In order to further identify the “two nine green” production performance, open from the spring of 1969