中糖2号在国家第13轮甘蔗品种区试的综合评价

Comprehensive Evaluation of Zhongtang No.2 in the 13th National Sugarcane Variety Regional Trial

为研究甘蔗新品种中糖2号在全国各个蔗区的适应性,中糖2号参加了2018—2020年在全国5省区18个区试点开展全国甘蔗新品种第13轮联合区试1年新植2年宿根区域试验。结果表明,以全国18个区试点的数据结果统计,1年新植2年宿根平均蔗产量6734 kg/667 m^(2),比对照ROC22增产11.16%,14点次增产;平均含糖量957 kg/667 m^(2),比对照ROC22增产7.29%,12点次增产;11—12月平均甘蔗蔗糖分为13.67%,1—3月平均甘蔗蔗糖分为15.30%,全期平均甘蔗蔗糖分为14.52%,比ROC22低0.20个百分点。第1年新植蔗产量6598 kg/667 m^(2),平均含糖量900 kg/667 m^(2),全期平均甘蔗蔗糖分13.57%;第1年宿根平均蔗产量6693 kg/667 m^(2),比ROC22增产15.66%,平均含糖量1017 kg/667 m^(2),比ROC22增产13.25%,全期平均甘蔗蔗糖分15.28%;第2年宿根平均蔗产量6963 kg/667 m^(2),比ROC22增产26.53%,平均含糖量952 kg/667 m^(2),比对照ROC22增产17.10%,全期平均甘蔗蔗糖分为14.75%。平均甘蔗纤维分为11.80%,比对照ROC22高0.70个百分点。通过人工接种鉴定对黑穗病的抗性级别为1级,抗性反应型为高抗;对花叶病的抗性级别为2级,抗性反应型为高抗。中糖2号高抗黑穗病,适宜机械收获。

In order to study the adaptability of the new sugarcane variety Zhongtang No.2 in various sugarcane regions across the country,Zhongtang No.2 participated in the 13th round of national sugarcane new variety joint regional trial in 18 districts of 4 provinces and regions from^(2)018 to 2020,with a one-year new planting and two-year recurrent root regional trial.The experimental results showed that based on the data from 18 pilot areas across the country,the average sugarcane yield of new planting and two years of perennial roots in one year was 6734 kg/667 m^(2),which increased by 11.16%compared to the control ROC22,and increased by 14 times compared to the control ROC22.The average sugar content was 957 kg/667 m^(2),which was 7.29%higher than the control ROC22.Compared with the control ROC22,it increased yield 12 times.The average sugarcane sucrose content from November to December was 13.67%,the average sugarcane sucrose content from January to March was 15.30%,and the average sugarcane sucrose content throughout the period was 14.52%,which was 0.20 percentage points lower than ROC22.In the first year,the newly planted sugarcane yield was 6598 kg/667 m^(2),with an average sugar content of 900 kg/667 m^(2)and an average sucrose content of 13.57%throughout the entire period.In the first year,the average cane yield of perennial roots was 6693 kg/667 m^(2),an increase of 15.66%compared to ROC22,with an average sugar content of 1017 kg/667 m^(2),an increase of 13.25%compared to ROC22,and an average cane sucrose content of 15.28%throughout the entire period;In the second year,the average cane yield of perennial roots was 6963 kg/667 m^(2),an increase of 26.53%compared to ROC22,with an average sugar content of 952 kg/667 m^(2),an increase of 17.10%compared to the control ROC22,and an average cane sucrose content of 14.75%throughout the entire period.The average sugarcane fiber content was 11.80%,which was 0.70 percentage points higher than the control ROC22.The resistance level to smut disease identified through artificial inoculation was level 1,and the resistance response type is high resistance.The resistance level to mosaic disease was level 2,and the resistance response type was high resistance.This variety had high resistance to smut and was suitable for mechanical harvesting.