杂交水稻新恢复系725的选育及其组配利用 Ⅰ.新恢复系725的选育及其特性

Breeding of a New Restorer 725 and Characters of Its Hybrid Combination in Rice

在强恢复系选育中，适当拉大双亲的生态差异和血源差异，通过亚种间籼爪交，选育新恢复系，是一条选育杂交水稻超高产组合，通过“三系”利用亚种间的杂种优势的重要途径。７２５是采用爪哇品种培迪的衍生系培矮６４与高配合力的汕型恢复系明恢６３／／泰引一号／ＩＲ２６杂交选育而成的杂交水稻新恢复系，７２５已配制的一批重穗型超高产组合，具有广阔的利用前景。

a new indica restorer is developed from the cross of Peiai 64(wide compatibility)///Minghui63(indica restorer)//Taiyin 1(indica restorer)/IR26(indica restorer),which successfully combined the wide compatibility gene with the restorer gene.With this good combining ability,its hybrids,such as Gangyou 725,Ⅱyou725 and Diyou 725 showed strong heterosis and higher disease resistance in comparison trials.Gangyou725 and Ⅱyou 725 have a yield advantage of 10% over the ckeck Shanyou63.