Regional trial results of late rice varieties (middle-maturity group) in Central and Northern Guangxi in 2013.

【Objective】The regional trial of late rice middle-maturity group were conducted in 2013 in order to select new rice varieties that suitable for planting in Northern and Central Guangxi. 【Method】Two rice varieties T78 you 2155 and Wuyou 308 were used as control, 11 tested new late rice varieties included H-Liangyou 1712, Zhongbaiyou 2155, Leyou1067, Wuyou 255, Quanyou 915, Deyou 108, Hengfengyou 2155, Huiliangyou 116, Hangliangyou 705, Xiangfengyou26 and Longliangyou 1439. The duration, yield and its component factors, disease resistance and quality of the above rice varieties were identified in regional trial of rice planting regions of Northern and Central Guangxi in 2013. 【Result】The duration with 107.5 days of H-Liangyou 1712 leaned to the longer, and most of the tested varieties showed appropriate mature period with 103.3-105.5 days, which ranged from 0-3 days as compared with T78 you 2155(CK1). The yield of5 varieties viz., H-Liangyou 1712, Deyou108, Hengfengyou 2155, Huiliangyou 116, Longliangyou 1439 were 7120.5,6931.5, 6937.5, 7162.5 and 6865.5 kg/ha, respectively, which was higher than that of two control. H-Liangyou 1712 was modrate susceptible to rice blast that better than the controls. Four varieties viz., Deyou108, Hengfengyou 2155,Huiliangyou 116, Longliangyou 1439 were susceptible or highly susceptible to rice blast, which were equivalent to control.Huiluangyou 116 and Longliangyou 1439 were moderate susceptible to bacterial blight, which showed better than the controls. Three varieties viz., H-Liangyou 1712, Deyou 108, Hengfengyou 2155 were susceptible or highly susceptible to bacterial blight. Among the tested varieties, five rice varieties viz., H-Liangyou 1712, Deyou108, Hengfengyou 2155,Huiliangyou 116, Longliangyou 1439 presented better comprehensive performance of yield, grain quality and resistance than the two controls, while 3 rice varieties Wuyou 225, Hangliangyou 705 and Xiangfengyou 26 were worse than the controls. 【Conclusion】H-Liangyou 1712 and Deyou108 could be recommended for provincial appraisal, Hengfengyou 2155,Huiliangyou 116, Longliangyou 1439 were needed to take part in regional test and production test in 2014, while 3 varieties(Wuyou 225, Hangliangyou 705, Xiangfengyou 26) would be obsoleted.