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早丰A是广东省农科院水稻研究所以自选保持系材料71B为母本,米31/W254杂交F_3代株系为父本进行人工杂交,然后从F_4代选择优良株系与印尼水田谷胞质不育系荣丰A测交并连续回交转育而成的早熟籼稻不育系。该不育系具有败育彻底、育性稳定、柱头外露率较高、开花习性较好、异交结实率较高、配合力好等特点,2012年通过广东省种子管理总站组织的专家技术鉴定。已先后配制出早丰优402、早丰优华占、早丰优107和早优736等多个组合分别通过国家或省级品种审定。
Zaofeng A is a hybrid of F31 progenies from rice line 71B of Guangdong Provincial Academy of Agricultural Sciences as the male parent and F 31 progeny of rice line 31 / W254 as the male parent. CMS line Rongfeng A test and continuous backcross breeding of early indica CMS lines. The sterile line has the characteristics of complete abortion, stable fertility, high stigma exsertion rate, good flowering habit, high outcrossing rate and good combining ability. In 2012, it passed the technical appraisal of experts organized by Guangdong Seed Management Station . Has been prepared as early HSBC 402, ZF HSU accounted for, early HSBC excellent 107 and early excellent 736 and other combinations were approved by the national or provincial varieties.