早籼两系杂交水稻新品种聚两优919丰产稳产性分析与综合评价

利用2017-2019年福建省早稻新品种区域试验和生产试验数据,通过变异系数、高稳系数和适应度分析等方法,研究聚两优919的丰产性、稳产性、适应性和综合表现。结果表明,聚两优919在2017-2018年２年区域试验平均产量为7771.13 kg?hm^-2,比对照品种T78优2155增产3.74%。2019年生产试验平均产量为6998.55 kg/hm²,比对照品种(T78优2155)增产4.00 %。2年区域试验平均变异系数为13.85%,低于对照品种T78优2155(14.38%),平均高稳系数为81.25％,高于对照品种(77.84%),平均适应度为68.9%,明显高于对照品种(41.7%)。全生育期2年区域试验平均128.3 d,比对照品种T78优2155早熟0.6 d,中抗稻瘟病,米质达部颁三等优质食用稻品种品质标准。表明聚两优919丰产性、稳产性和适应性好,抗病性、稻米品质和主要农艺性状等综合性状优良,适宜福建省作早稻种植,推广应用前景良好。

Analysis and Comprehensive Evaluation on High and Stable Yield of New Early Indica Two-line Hybrid Rice Variety Juliangyou 919

In order to have a comprehensive understanding of the production characteristics of the new early Indica two-line hybrid rice variety Juliangyou 919, and guide the application in production, variation coefficients, high-stable coefficient and fitness analysis method were employed to analyze the yielding ability,stability and adaptability of Juliangyou 919 and the control T78you 2155 with regional trials and productive trial data during 2017-2019. The results showed that the average yields in regional trials in 2017 and 2018 were 7771.13 kg?hm^-2, increased by 3.74% compared to control T78you 2155. In productive trial in 2019, the average yield was 6998.55 kg?hm^-2, which increased by 4.00 % compared to control T78you 2155.The average variation coefficient in the 2-year regional trial was 13.85 %, which was lower than that of the control variety T78you 2155 ( 14.38 % ), and the average high stability coefficient was 81.25 %, which was higher than that of the control variety ( 77.84 % ), and the average fitness was 68.9 %, which was significantly higher than that of the control variety ( 41.7 % ). Its whole growth duration on average of the 2-year regional trial was 128.3 d, 0.6 d shorter than that of T78you 2155, and it was medium resistant to rice blast. The grain quality of Juliangyou 919 was judged to be Grade 3 for edible rice according to the standard set forth by the Ministry of Agriculture. The results showed that Juliangyou 919 had good yield, stable yield and adaptability, good disease resistance, rice quality and main agronomic traits. It was suitable for early rice planting in Fujian Province and had good application prospects.