紫花苜蓿优良牧草单株筛选

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Screening of superior individual plants in alfalfa as forage

ZHOU Yulei1CAI Wenjing1LIN Zhongyang2 ZHANG Jingni3MA Qianpeng4 ZHANG Xiaohua4SHEN Yuhua'

（ College of Agriculture， Chifeng University， Chifeng 0240oo， China； 2Chifeng Agriculture and Animal Husbandry Technology Extension Center， Chifeng O240oo， China； 3Clover （Beijing）Eco-Tech Co.，Ltd.， Beijing 101318， China； 4Forestry and Grassand Bureau of Balin Left Banner， Chifeng O24Ooo， China； 5Collge of Chemistry and Life Sciences， Chifeng University， Chifeng O240oo， China）

AbstractTo screening superior individual plants in alfalfaas forage，a variant population of 71 plants derived from 12 cultivars （including Derbyand Defu）after 5years of cultivation and two rounds of morphological selection was used as experimental material.Plantheight，tillr number，and other traits were measured for cluster analysisand individual plant selection.The results showed thatthe71 mutant populations were divided intotwo majorcategories，with17 and54 individual strains respectivelyat，a euclidean distance of 4，the second major cluster was divided into three subclusters：SubclusterIcomprised24 individuals （No.48，42，83，31，45，39，44，52，9，14，7，11，4，6，92，38，86，23， 58，15，32，22，41 and8）；SubclusterII containedonlyNo.40；and SubclusterIlincluded7 individuals （No.90，94，19， 30，2，93and33）.Comparative analysis revealed that SubclusterI aggregated plants withhigher tilernumbers，greater plant height，and lower stem-to-leaf ratio，while Subcluster I grouped plantswith longer internodes.Subcluster II comprised plants withahigherdry-to-fresh weightratio.Basedoncomprehensive evaluation，eightsuperiorindividuals （No.2，19，30，33，40，90，93and94）exhibiting highyieldandqualitytraitswereselected，providing foundational materialforbreedinghighquality，highyieldingalfalfalines. Keywordsalfalfa； cluster analysis； trait comparison； individual selection method

紫花苜蓿是蔷薇目、豆科苜蓿属多年生草本植物，是常见的饲料作物之一，具有产量高和品质优等特点。（剩余3937字）