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豫粳2号(原名郑州早粳)粳适合在我省实行麦茬水稻旱种,现将该品种选育、性状及栽培要点介绍如下:一、豫粳2号的选育该品种是1969年以京引37为母本,郑粳7号为父本进行杂交。1970年选出12个单株,组合编号为7(即6907)。1971年选出71个单株,1972年选出8个单株,其中4个单株表现整齐、性状好,混合收获。1973年6907-3-2-4-1和6907-3-2-4-3两个株系参加“中熟甲组。鉴定试验。6907-3-2-4-1品系折合亩产556.8公斤,比对照品种小占101增产6.92%,表现早熟、整齐。1974、1975年连续两年分别参加“中粳晚熟组”和“麦茬组”鉴定试验,折合亩产分别为583.5公斤和516.3公斤,比对照品种津辐一号增产14.97%、
Yujing 2 (formerly Zhengzhou early japonica) japonica japonica rice crop suitable for implementation in our province dry, now the variety breeding, traits and cultivation points are described below: First, Yujing 2 Breeding of the variety is in 1969 to Jing cited 37 as the female parent, Zhengjing 7 as the male parent. Twelve individual plants were selected in 1970 with a combination number of 7 (ie, 6907). 71 single plants were selected in 1971, and 8 single plants were selected in 1972. Four of them showed neat, good traits and mixed harvest. In 1973 6907-3-2-4-1 and 6907-3-2-4-3 two strains to participate in “medium cooked group A. Identification test .6907-3-2-4-1 strain equivalent to yielding 556.8 kg per mu , Accounting for 6.92% more than that of the control cultivar Xiaozhan 101. Early in 1974 and 1975, two consecutive years participated in the appraisal test of ”middle-late japonica rice“ and ”wheat stubble group", respectively, yielding 583.5 kg and 516.3 kg per mu respectively, Jin-One than the control varieties 14.97% increase,