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针对龙特甫A育性不稳定的缺点进行遗传改良,育成了基本上继承了龙特甫A优良特性,但不育性稳定性比其好的新不育系T55A。用它与强恢复系明恢70配组育成的杂交稻新组合T优5570具有特优组合的丰产、稳产和适应性强等特性,并且杂种纯度高,2002年12月通过福建省农作物品种审定委员会审定。
Aiming at the shortcomings of Longtefu A fertility instability, genetic improvement was made and a new sterile line T55A which basically inherited the excellent characteristics of Longtepu A was bred, but its sterility stability was better. T You 5570, a new hybrid rice combination with strong restorer Minghui 70, has the characteristics of high yield, stable yield and strong adaptability with high yield and high hybrid purity. It was approved by Fujian Crop Variety in December 2002 Commission approval.