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Copyright of Southwest China Journal of Agricultural Sciences is the property of Editorial Department of Southwest China Journal of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

[Objective] To explore an effective method to evaluate the cold-tolerant adaptability of Hypophyllum sibiricum, and to screen good germplasm resources with strong cold-tolerance. [Methods] Taking 43 resources of B. flat spikelet as the research object, observing its overwintering and turning green and its growth in early spring, using difference analysis, correlation analysis, principal component analysis and cluster analysis to carry out the study of B. vulgaris resources Adaptability evaluation. [Results] The cold-tolerant growth of 43 bonnet resources tested differed greatly. Among them, 79.07% of the resources could not survive the winter or could survive the winter but the growth performance was poor or average. The 20.93% of the resources not only survived the winter smoothly, but also had better growth performance. good. Principal component analysis showed that yield, water content, tiller number and leaf type can be used as the priority factors in the selection of cold-tolerant materials. Cluster analysis divided the 40 materials that returned to green after overwintering into 4 types. Only 1 material was in type I, 8 materials in type II, 5 materials in type III, and 26 materials in type IV. [Conclusion] A total of 9 resource materials of group I and group II selected in the experiment showed good production performance in winter and early spring, which can be used as further cold-resistant materials. [ABSTRACT FROM AUTHOR]

[Objective]The nutritional value of 30 red clover germplasm resources was evaluated in order to screen out the resource materials with good nutritional value. [Method]9 nutritional factors of flowering red clover was evaluated by grey relational degree analysis. [Result] Two nutritional value excellent material was screened from 30 materials, respectively, zxy2009 p-6328 , zxy2009p-6335 , the crude protein of two material were 17. 59 % ,16. 46 % ; there are 6 good nutritional value and 11 anerage nutritional value, with 11 being poor nutritional value. [Conclusion] Two nutritional value of the excellent material selected from 30 materials, can be used as red clover resource materials further breeding work of reference. [ABSTRACT FROM AUTHOR]

Copyright of Southwest China Journal of Agricultural Sciences is the property of Editorial Department of Southwest China Journal of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)