Study on the Relationship between Standards Fall-dormancy of Alfalfa Variety with Fall-dormancy Seedling Morphology and Winter Hardiness

doi:10.7668/hbnxb.2010.02.037

Abstract

Abstract: For searching rapid testing alfalfa fall dormancy method,11 fall-dormancy standard checks of alfalfa varieties were measured in the distance of cotyledon to the first leaf,the distance between 1st-2nd leaf,and winter-survival rate in seedlings stage in this paper.The results showed there were extremely significant positive correlation not only between fall-dormancy and the distance of cotyledon to the first leaf,but also extremely significant(P0.01)positive correlation between fall-dormancy and the distance of 1st-2nd leaf;which showed there were relationship between fall dormancy and the distance of cotyledon to the 1st leaf,the distance of 1st-2nd leaf.The correlation of distance of cotyledon to the 1st leaf and the winter-survival rate was extremely significant negative,the distance of 1st-2nd leaf and the winter-survival rate was also extremely significant negative also;which suggest the distance of cotyledon to the 1st leaf and the distance of 1st-2nd leaf could be indexes to estimate alfalfa winter survival rate.Although there were significant differences between different fall dormancy groups,but there were no significant differences in alfalfa cultivars among fall dormancy groups;some varieties with higher fall dormancy,but with lower the 1st leaf to cotyledon distance and the distance of 1st-2nd leaf;which suggested that the 1st leaf to cotyledon distance and the distance of 1st-2nd leaf could be used as index to estimate alfalfa fall-dormancy in which group,but could not be used as index to measue fall dormancy accurately.

Key words: Alfalfa, Fall dormancy standard checks varieties, Winter-surv ival rate, The distance between coty ledon to the 1st leaf, The distance of 1st- 2nd leaf

CLC Number:

S551.7??

YU Lin-qing, YUN Jin-feng, GUO Jiu-feng, SUN Guo-qin, ZHANG Li-jun, SUN Juan-juan. Study on the Relationship between Standards Fall-dormancy of Alfalfa Variety with Fall-dormancy Seedling Morphology and Winter Hardiness[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2010, 25(2): 182-187. doi: 10.7668/hbnxb.2010.02.037.

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