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890是将(当选晚2号×74—241)F_2稻株适宜时期的花药,采用细胞工程技术,再生大量的正常缘苗,经倍性处理,获得纯合后代,进行繁殖,择优,鉴定,选育而成。据连续三年在安徽省农科院水稻研究所试验田以及黄山和无为等市、县进行品比试验和生产示范,表现高产稳产、熟期适中、抗稻瘟病和白叶枯病、适应广等特点,属中熟晚粳新品系。该稻株高85厘米左右,遗传性状稳定,田间生长整齐一致,茎秆坚韧,稻株挺立,株形紧凑,叶片大小适中,繁茂性好,光照姿态佳。分蘖力较强,后期落色好。根系粗壮发达、不早衰,成熟时秆青籽黄。据参加国家南方稻区(黄山点)晚粳区试和1992年安徽省常规晚粳区试(无为点)等多点连续品种比较试验鉴定,折合亩产429.5—500.0公斤,比鄂宜105增产25%—
890 is an anther which is suitable for F_2 rice plants (late night × 2 × 74-241), regenerating a large number of normal margin seedlings by means of cell engineering technology, obtaining homozygous offspring through multiplication treatment, breeding, selection, identification, Breeding. According to three consecutive years in the Anhui Provincial Academy of Agricultural Sciences Institute of rice and Huangshan and Wuwei and other cities and counties to carry out the ratio test and production demonstration, showing high and stable yield, moderate maturity, resistance to rice blast and bacterial blight, to adapt to the wide Characteristics, is a new line of late maturing medium lines. The rice plant height of about 85 centimeters, genetic stability, uniform growth in the field, stem tough, rice plants stand tall, compact plant shape, leaf size, good lush, good light attitude. Strong tillering, late fall color. Roots stout, not premature aging, mature stalks yellow seed. According to participating countries in the southern rice (Huangshan point) late japonica test and 1992 conventional late japonica rice test (non-point) and other multi-point continuous varieties identified in the comparative test, equivalent to 429.5-500.0 kg per mu, more than the E 105 25% -