【摘要】 利用包括三种不育胞质和正常胞质的三套近等基因系对花时进行了质核效应分析．结果表明，峰前花主要受核和质核互作的控制，峰后花主要受质的控制．在不育系中出现的两个开花高峰既有质和核的作用，又有质核相互作用．开花累积率主要是质的作用．K-cms、K17R和K青B均可作为高开花累积率的资源，应用于不育系的改良．更多还原

【Abstract】 By using three series of isonucleus-allocytoplasmic lines, an investigation was carried out on the time of flowering in indica rice (0. Sativa L. ssp. indica) the results are as follows: the percentage of flowering before culmination is mainly determined by nuelear background or cytoplasm-nuclear interaction, while the percentage of flowering after culmination is mostly affected by cytoplasmic background. The occurrence of two flower ing culminations in male sterile lines ia owed to the influence of nuclear tnd cytoplasmic background as well as cytoplasm-nuclear interaction. The accumulative pereentage of flowering (FAP) before the end of maintainer’s flowering culmination is majorly controlled by cytoplsmic background. Thus ,witk higher FAP, K-cms, K17B,and K Qing B can be exploited in hybtid rice breeding in order to improve the outcrossing potentiality of male sterile lines.更多还原