摘要
本研究以甘肃地区6份野生草地早熟禾种质为材料,开展了其种子产量相关性状特征分析及其对矿质元素利用效应评价,旨在为甘肃野生草地早熟禾种质资源利用改良和种质创新以及对矿物质高效利用提供研究基础和理论参考。结果表明,11个种子产量相关性状和8种矿质元素的变异系数为4.46%~50.88%,其中钠、钙、分枝上的种子数变异系数均大于40.00%,变异幅度较大。相关性分析结果显示,增加花序长、分枝数、小穗上的小花数、分枝上的种子数、小穗上的种子数以及小穗结实率,可提高草地早熟禾种子产量。8种矿质元素的平均含量顺序为K>Mg>Ca>Na>Mn>Zn>Fe>Cu,且不同元素之间存在复杂的相关性,以此为依据得出草地早熟禾生殖生长期间,多施K、Cu和Mn肥,少施Zn、Fe、Na、Mg和Ca肥可获得种子高产。聚类和主成分分析结果显示,依据19个性状对甘肃野生草地早熟禾的综合排名为秦州>兰州>陇西>甘南>清水>陇南,且前2个、中间2个及后2个种质各为一类,表明秦州这个材料在小穗上的小花数、分枝上的种子数、小穗上的种子数、花序种子数,小穗结实率、千粒重上均表现较好,可作为育种研究的优良亲本材料。
In this study,we analyzed traits related to seed yield and the ability to utilize various minerals in six wild germplasms of Poa pratensis(Kentucky bluegrass)from Gansu.The overall aim of this research was to provide a research basis and theoretical reference to improve the use of this plant,generate new germplasm,and identify wild Kentucky bluegrass varieties that can utilize certain minerals.The coefficients of variation of 11 seed yield-related traits and eight traits related to mineral elements ranged from 4.46%to 50.88%.The coefficients of variation for sodium content,calcium content,and the number of seeds on branches were all greater than 40.00%,indicative of wide variability.Correlation analyses showed that the seed yield of wild Kentucky bluegrass was positively correlated with inflorescence length;number of branches;number of florets on spikelets;number of seeds on branches;number of seeds on spikelets;and spikelet seed setting rate.The mineral elements were ranked from highest average content to lowest,as follows:K>Mg>Ca>Na>Mn>Zn>Fe>Cu,and there were complex correlations among the different elements.The results of clustering and principal component analyses showed that the comprehensive ranking of wild Kentucky bluegrass germplasm in Gansu based on 19 traits was Qinzhou>Lanzhou>Longxi>Gannan>Qingshui>Longnan,and the first two,middle two,and last two germplasms each formed one category.Therefore,the material from Qinzhou performed best in terms of the numbers of florets on spikelets,seeds on branches,seeds on spikelets,seeds on inflorescence,spikelet seed setting rate,and thousand grain weight.The Qinzhou strain of Kentucky bluegrass was therefore identified as a good parental material for breeding research.These results provide a theoretical basis and basic data for further research on germplasm resource classification,genetic characteristics,internal relationships among traits,and on the selection,utilization,and improvement of traits in wild P.pratensis.
作者
哈雪
张金青
白方旭
马祥荣
王安琦
马晖玲
HA Xue;ZHANG Jin-qing;BAI Fang-xu;MA Xiang-rong;WANG An-qi;MA Hui-ling(Pratacultural College,Gansu Agricultural University,Key Laboratory for Grassland Ecosystem of Ministry of Education,Pratacultural Engineering Laboratory of Gansu Province,Sino-U.S.Centers for Grazing Land Ecosystem Sustainability,Lanzhou 730070,China)
出处
《草业学报》
CSCD
北大核心
2023年第4期54-67,共14页
Acta Prataculturae Sinica
基金
国家自然科学基金(31760699)
甘肃省优秀研究生“创新之星”项目(2021CXZX-347)资助。
关键词
甘肃野生草地早熟禾
种质资源
种子产量相关性状
矿质元素
wild Kentucky bluegrass in Gansu
germplasm materials
seed yield related traits
mineral elements
作者简介
哈雪(1997-),女,回族,甘肃天水人,在读硕士。E-mail:2780626158@qq.com;通信作者:马晖玲,E-mail:mahl@gsau.edu.cn。
