| Abstract:To select autumn sown triticale lines suitable for the production in Longdong area,a field experiment was conducted in Longdong rainfed plateau area to determine the plant height,branch number,stem diameter,ear length,ear diameter,fresh yield and hay yield of 22 triticale lines over two years (from 2020 to 2021 and from 2021 to 2022). Triticale varieties ‘Zhongsi 1048’ and ‘Shida No.1’ were used as the controls,and comprehensive evaluation was conducted using grey correlation analysis. Indexes determined from 2020 to 2021 were significantly higher compared with those from 2021 to 2022. Over the two years,the average plant height of 24 triticale materials ranged from 125.00 cm to 185.90 cm,the average number of branches ranged from 515.83×104 to 663.33×104 branches per hectare,the average stem diameter ranged from 3.33 mm to 3.89 mm,the average ear length ranged from 10.06 cm to 12.01 cm,the average ear diameter ranged from 6.00 mm to 8.57 mm. Additionally,the average fresh and hay yields ranged from 33.71 t/hm2 to 43.44 t/hm2 and 11.22 t/hm2 to 15.78 t/hm2,respectively. The hay yields of triticale lines TP17 20,TP17 45,TP17 39,TP17 51,TP17 1,TP17 27 and TP17 34 obtained in 2020 to 2021 were high,with ideal yield potentials,whereas the hay yields of TP17 34,TP17 15,TP17 51,TP17 20 and TP17 48 were better in 2021 to 2022,showing strong drought resistance. The comprehensive evaluation showed that the weighted correlation values of triticale lines TP17 20,TP17 56,TP17 34,TP17 60,TP17 48,TP17 15,TP17 45,TP17 38 and TP17 51 were higher than those of the two controls. Triticale lines TP17 34,TP17 51,TP17 20 exhibite advantages such as high and stable yields,and strong drought resistance,which are suitable for the Longdong rainfed plateau area. |
