籼型两系杂交早稻田两优402的选育与应用研究

A Study on the Selection and Application of Two-Line Hybrid Indica Early Rice “Tianliangyou 402”

“田两优 40 2” ,原名F1 31S/R40 2 ,是赣州市农科所育成的一个两系法籼型杂交早稻组合。母本“田丰S”是该所育成的籼型两用核不育系 ;父本R40 2是湖南安江农校选育成的三系法早杂恢复系。该组合全生育期 1 1 5d左右 ,分蘖力较强 ,穗粒结构、丰产性、抗性、熟期都较好。从 1 996年起在省内外试验、试种和示范均表现出明显的增产优势。是一个高产稳产、抗性较强、米质较优的两系籼型杂交早稻新组合。 1 998年通过江西省农作物品种审定委员会审定 ,命名为“田两优 40 2” ,母本F1 31S命名为“田丰S”。

Tianliangyou 402”, whose original name was F131S/R402, is a two-line hybrid indica early rice combination bred by Ganzhou City Agricultural Science Institute. Its maternal parent “Tianfeng S” is an indica dual-purpose genic male-sterile line bred by this institute. Its paternal parent“R402” is a three-line hybrid restorer line of early rice. The growth duration of this combination is about 115 days. Its tillering capacity is comparatively strong. The construction of spikes and grains, character of high-yield, disease-resistance and ripe-time all show good performances. It has shown obvious superiority in increasing-production in experiment culture and demonstration since 1996. This variety is a high-yield, stable-yield, high-resistance and super-quality new two-line hybrid indica early rice combination, it has passed the examination by the Crop-Variety-Examination Comittee of Jiangxi Province, and is named “Tianliangyou 402”. Its maternal parent is named “Tianfeng S”.