%A JIA Xiao-Ping,QUAN Jian-Zhang,WANG Yong-Fang,DONG Zhi-Ping,YUAN Xi-Lei,ZHANG Bo,LI Jian-Feng %T Effects of different photoperiod conditions on agronomic traits of foxtail millet %0 Journal Article %D 2019 %J Acta Agronomica Sinica %R 10.3724/SP.J.1006.2019.84128 %P 1119-1127 %V 45 %N 7 %U {https://zwxb.chinacrops.org/CN/abstract/article_6716.shtml} %8 2019-07-12 %X

One hundred and sixty foxtail millet materials were selected to investigate heading stage, plant height, leaf number, panicle length, panicle diameter, branch number per panicle, kernel number per branch, panicle weight, grain weight per panicle and 1000-grain weight under short-day (Hainan), middle-day (Henan), long-day (Jilin), three different photoperiod conditions in two consecutive years. The multiple factor variance analysis and multiple comparisons were performed by SPSS software (19.0 version) to explore the effects of photoperiod on the ten traits, and evaluate the photoperiod sensitivity of 160 foxtail millet materials. There were highly significant differences in heading stage, plant height, leaf number, panicle length, panicle diameter, branch number per panicle, kernel number per branch, panicle weight, grain weight per panicle (P < 0.01), and significant difference in 1000-grain weight (P < 0.05) among three photoperiod conditions. Five traits (heading stage, plant height, leaf number, panicle length, branch number per panicle) had increasing tendency with the prolonging of day time. The variety had extremely significant effect on all of the ten traits (P < 0.01), and the year had extremely significant effect on the nine traits except for 1000-grain weight (P < 0.01). The interaction between photoperiod and variety showed extremely significant effect on all of the ten traits (P < 0.01), and that between photoperiod and year had extremely significant effect on the remaining nine traits except for heading stage (P < 0.01). The interaction between year and variety showed extremely significant effect on plant height, leaf number, panicle length, panicle diameter, panicle weight, grain weight per panicle, branch number per panicle and kernel number per branch (P < 0.01). The varieties with low or moderate sensitivity to photoperiod exhibited no clear regional characteristics. While most of the materials with strong sensitivity to photoperiod were landrances mainly from spring millet regions. The very insensitive material (Xiaozaogu) and the very strong sensitivity materials (Huhehaotedamaogu, Rangu, Honggaigu, Qiegu, Er’baigu and so on) screened out in this study provide a foundation for breeding cultivars insensitive to photoperiod and carrying out studies about formation mechanism of photoperiod sensitivity in foxtail millet.