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机构地区:[1]广西大学支农开发中心
出 处:《杂交水稻》1998年第6期7-9,共3页Hybrid Rice
基 金:广西区科委;教委资助
摘 要:红广A是以珍汕97A为母本,用自选的红广为父本杂交,采用连续回交方法转育而成的大穗型籼稻不育系。其不育性稳定,柱头发达、外露率高,异交结实率高,易于繁殖制种;农艺性状好,配组杂种优势强。Hongguang A, developed from the cross Zhenshan 97A/Hongguang by successive backcrossing to Hongguang, which is derived from Hongmeizao∥Guanglu'ai 4/Tiandong Ganlian (wild rice), is an indica large-panicle CMS line in rice. It has stable and complete sterility (37.5% typical abortive pollens and 62.5% spherical abortive pollens), high stigma exsertion rate (90.1%), relatively centralized anthesis time (85.6% spikelets opened during 11:00~12:30 in a day), high outcrossing rate (>50%), large panicle (168 spikelets/panicle) and good combining ability. The hybrids of Hongguang A showed strong heterosis (yielding higher than the checks Shanyou 63 and Shanyou Gui 99 by 5%~15%) and acceptable grain quality (better than the hybrids of Zhenshan 97A). The key points in its multiplication, hybrid seed production and F 1 hybrid cultivation were also briefly mentioned.
关 键 词:水稻 大穗型不育系 柱头外露率 异交结实率 选育
分 类 号:S511.210.3[农业科学—作物学]
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