Alfalfa bud stage cold resistance identification model and alfalfa cold resistance identification method

By establishing a model for identifying the cold resistance of alfalfa buds, and using indicators such as germination rate, simplified vigor index, root length, and germination index, the problem of identifying cold-resistant alfalfa varieties was solved, enabling efficient planting and high survival rates in cold regions.

CN121667060APending Publication Date: 2026-03-17HEILONGJIANG ACAD OF AGRI SCI ANIMAL HUSBANDRY & VETERINARY BRANCH
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Patent Information

Application Number
CN202511869699.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-12-11
Publication Date
2026-03-17

AI Technical Summary

Technical Problem

Existing technologies lack effective methods for identifying and screening alfalfa varieties with strong cold resistance, resulting in low overwintering survival rates when alfalfa is planted in cold regions of northern my country, which in turn leads to reduced yields.

Method used

A model for identifying the cold resistance of alfalfa during the germination stage was established. The cold resistance level of alfalfa was determined by using the regression equation Y=﹣2.771+0.016X1+0.061X2+0.900X3+0.054X4 and indicators such as germination rate (X1), simplified vigor index (X2), root length (X3), and germination index (X4). A rapid identification kit was also provided for identification.

Benefits of technology

It provides a rapid and accurate method for identifying alfalfa cold resistance, enabling the screening of cold-resistant alfalfa germplasm resources suitable for planting in cold regions, and improving the overwintering survival rate and yield of alfalfa in northern regions.

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Abstract

The invention aims to provide a model and a method for identifying the cold resistance of alfalfa in the bud stage, the identification model relates to the relationship between four cold-resistant indexes and cold-resistant grade (Y) of alfalfa at 6 + / -0.1 DEG C, the four cold-resistant indexes are alfalfa germination rate (X1), alfalfa simplified vigor index (X2), alfalfa root length (X3) and alfalfa germination index (X4), and the relational expression is Y =-2.771 + 0.016 X1 + 0.061 X2 + 0.900 X3 + 0.054 X4, when Y is more than or equal to 0.70 and less than or equal to 1.00, the alfalfa variety is a strong cold-resistant variety; when Y is more than 0.40 and less than 0.70, the alfalfa variety is a medium cold-resistant variety; when Y is more than or equal to 0.00 and less than or equal to 0.40, the alfalfa variety is a non-cold-resistant variety. Experiments prove that the model has the characteristics of high accuracy, rapidness and high efficiency when being used for identifying alfalfa cold-resistant germplasm resources.
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