目前,世界各柑桔主产国都十分重视柑桔新品种的研究,并取得了引人注目的进展。1986年4月赵紫阳总理考察川鄂贫困山区时告诫柑桔科技人员说:“现在大家都在发展柑桔,如果不搞新品种,七、八年后就有可能卖不掉”。在柑桔生产中,对柑桔新品种的研究十分重要,而杂交育种乃是培育新品种的重要方法。一、杂交育种的历史和现状在柑桔杂交育种方面,美国起步较早,规模也较 At present, the major citrus producing countries in the world all attach great importance to the research of new citrus varieties and have made remarkable progress. In April 1986, when Zhao Ziyang inspected the poor mountainous areas in Sichuan and Hubei Province, he warned citrus scientists: “Everyone is developing citrus now, and if you do not engage in new varieties, you may not be able to sell it after seven or eight years.” In citrus production, the study of new citrus varieties is very important, but hybrid breeding is an important method to cultivate new varieties. First, the history and current situation of hybrid breeding In citrus hybrid breeding, the United States started earlier, the scale is also more