【摘要】 选择新近配组成功的、有苗头的优质杂交水稻组合 ,与在生产中已普及的组合共 2 6个 ,以汕优 6 3作对照 ,进行了品种比较试验。结果表明 :( 1)与对照相比 ,供试组合中虽出现了比其稻谷产量高 5 %以上组合 ,但产量相差达显著水平的组合极少 ;若以整精米率相比 ,则新组合中出现了不少超过对照产量 30 %～ 10 0 %以上的组合 ,产量相差极显著。 ( 2 )新组合与原有组合相比 ,在粒形的长 /宽比、整精米率和综合食味等方面有了较大改进 ,表明我国杂交水稻优质化育种已经取得了长足的进步。但在垩白粒率和垩白度方面基本没有多少改进 ,它们将直接影响优质化的整体水平 ;少数组合还存在直链淀粉含量偏低的问题。 ( 3)综合生育期、抗逆性、产量、品质与商品性 ,初步认为 ,丰两优 1号、两优培九、金优 6 3、协优 5 5 9、协优 81、D优 5 2、6 5S 1、丰优 12、国丰 1号、K优 6 5、丰优 5 5及Ⅱ优 5 5 9等组合优于汕优 6 3 ,取代汕优 6 3成为适合于涝渍地的新一代当家组合成为一种大趋势更多还原

【Abstract】 Some newly bred combinations of hybrid rice(HR),which are considered of promising quality,with some widely used combinations together,amounting to 26 totally,and with Shanyou 63 as the control at the same time,were chosen to test their actual eating quality expressions in 2000 in the waterlogged area of Jianghan Plain.The result showed that only two combinations had 5% yield higher with 0.05 probability significance over the control;comparing with the older combinations,the newly bred combinations had great improvement in length/width ratio,rate of whole milled rice,and integrated eating quality,indicating that the hybrid rice breeding aiming at better eating quality in recent years was progressing.On the other hand,there were almost no any improvements in white belly rice ratio and the degree of white belly,which would adversely,affected the whole enhancement of the quality of hybrid rice.The low amylose content in some combinations was also a big problem.By synthesizing the growth period,the resistances,the yield levels.the eating quality and so on,it was concluded that the newly bred combinations would replace Shanyou 63 as the dominant combinations of a new generation.更多还原