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对杂交水稻威优64和汕优63十年联合区域试验资料统计分析表明：威优64作早稻区试产量变幅6180～6900kg／hm2，平均6456kg／hm2，变异系数1．16％；作中稻区试6645～7815kg／hm2，变异系数2．08％。汕优63作晚稻区试5759～6525kg／hm2，平均6215kg／hm2，变异系数1．43％；中稻区试7728～8759kg／hm2，平均8304kg／hm2，变异系数1．73％。两个组合产量较为稳定，未显优势退化现象。今后杂交水稻育种的策略应是稳中求高。首先通过更新不育系和恢复系，选配新组合；其次调整生育期；再次改善栽培技术，以求杂交水稻产量上新台阶。
The statistical analysis of ten years combined experimental data of Weiyou 64 and Shanyou 63 in hybrid rice showed that the test yield of early rice in Weiyou 64 ranged from 6180 to 6900 kg / hm2 with an average of 6456 kg / hm2 with a coefficient of variation of 1.16% Zone test 6645 ~ 7815kg / hm2, coefficient of variation 2.08%. Shanyou 63 had 5759 ~ 6525kg / hm2 for late rice trial, with an average of 6215kg / hm2, and a coefficient of variation of 1.43%. Middle rice trial had 7728 ~ 8759kg / hm2 with an average of 8304kg / hm2 with a coefficient of variation of 1.73%. The two combinations yield more stable, no significant degradation phenomenon. Future hybrid rice breeding strategy should be steadily higher. First of all, through the update of CMS and restorer lines, matching new combinations; followed by adjusting the growth period; again improve the cultivation techniques in order to hybrid rice yield to a new level.