Abstract:

In order to explore the regional adaptability of millet varieties and provide reference for the breeding of new millet varieties, ‘Yugu 18’, ‘Yugu 31’, ‘Yugu 32’, ‘Yugu 35’, ‘Yugu 38’ and ‘Yugu 42’ were selected as test materials. The adaptability and sensitivity to light and temperature of 6 varieties were analyzed by coefficient of variation, coefficient of high stability, regression coefficient and relative sensitivity to light and temperature.The agronomic characters of different varieties in different districts were analyzed statistically, and the variation coefficients of different characters among different districts were compared. The results showed that all 6 millet varieties could adapt to 2 or more different ecological regions, especially‘Yugu 18’ showed high yield, stable yield and wide adaptability in 4 different ecological regions. The growth period of the 6 varieties was longer in the early maturing group of northwest spring millet area, the panicle weight, grain weight per panicle and 1000-grain weight were higher in the early maturing group of northwest spring millet area and the middle and late maturing groups of northwest spring millet area, and the panicle length was longer in the northeast spring millet area. There was no obvious trend in yield, plant height and grain emergence rate. The coefficient of variation of agronomic traits was the smallest with 1000-grain weight and the largest at heading stage. Taking Xiagu district as reference, the sensitivity of ‘Yugu 18’ was the weakest in different district groups. ‘Yugu 18’ showed the characteristics of high yield, stable yield and wide adaptability in 4 different ecological regions.

Key words: millet, ‘Yugu 18’, regional, adaptability, light and temperature sensitivity