优质高产中熟杂交晚稻新组合T优259的选育

Breeding of T You 259,A New Combination of Medium-maturing Late Hybrid Rice with Good Grain Quality and High Yield

1999年,用国家杂交水稻工程技术研究中心选育的优质不育系T98A与湖南农业大学选育的优质恢复系R259配组育成杂交晚稻新组合T优259.该组合全生育期110～115 d,产量7.5 t/hm2左右,主要稻米品质达部颁优质米二级以上标准,中感稻瘟病,中抗白叶枯病,抗寒性强,适应性广,于2003年3月通过湖南省农作物品种审定委员会审定,并已向农业部申请植物新品种种权保护.

T you 259, derived from the fine quality CMS line T98A and the fine quality restorer line R259 (R259 is bred from the cross of the fine quality restorer line 207 and the wide-compatibility line 9453), is a new medium-maturing late hybrid rice combination. It has a growth duration of 110 days to 115 days.Its yield is 7.5 t/hm2 or so and its quality has reached the good grain quality standard of the 1st～2nd class which is made by the Agriculture Ministry,P.R.C. It has better resistance against disease, strong cold tolerance and wide adaptability. It is approved for release by the Crops Cultivar Appraisal Commission of Hunan Province in March 2003, and is applied to Ministry of Agriculture for protection on the right of new plant breed variety.