Preliminary assessment of fall dormancy in 45 alfalfa cultivars

doi:10.11686/cyxb2014511

Abstract

Abstract: Following the methods of Teuber and using 11 different American fall dormancy standard alfalfa cultivars as contrasts, we assessed the fall dormancy class of 45 alfalfa cultivars from the drought area of western Inner Mongolia in 2013 and 2014. We conducted a regression analysis of the relationship between fall dormancy class and natural plant height after final clipping and compared results with the 11 American cultivars. Results showed that natural plant height at 21 days after autumn clipping and fall dormancy class had a linear relationship with R² of 0.9643 and 0.9867 respectively. Analysis showed that the correlation coefficient between actual fall dormancy class and the 11 comparator varieties is 0.994. The correlation coefficient for 13 known fall dormancy introduced varieties is 0.969. Cluster analysis showed that 90% of 21 domestic alfalfa cultivars are either dormant or highly dormant types. The actual fall dormancy classes of Yumu No.1, Gannong No.5 and Liangmu No.1 were 6.8, 7.4 and 8.5, indicating that they belong to the non-dormant type.

FANG Shan-Shan, SUN Qi-Zhong, YAN Ya-Fei, LIU Zhi-Ying, TAO Ya, LI Feng. Preliminary assessment of fall dormancy in 45 alfalfa cultivars[J]. Acta Prataculturae Sinica, 2015, 24(11): 247-255.

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