饲用小黑麦重组自交系群体草产量的相关性状分析  

Analysis on correlation characters of grass yield in recombinant inbred lines of forage triticale

作　　者：郭蕊 金星娜 常丹丹 杜文华[1] GUO Rui;JIN Xing-na;CHANG Dan-dan;DU Wen-hua(College of Grassland Science,Gansu Agricultural University,Key Laboratory for Grassland Ecosystem,Ministry of Education,Grassland Engineering Laboratory of Gansu Province,Sino-U.S.Centers for Grazing Land Ecosystem Sustainability,Lanzhou 730070,China)

机构地区：[1]甘肃农业大学草业学院,草业生态系统教育部重点实验室,甘肃省草业工程实验室,中-美草地畜牧业可持续发展研究中心,甘肃兰州730070

出　　处：《草原与草坪》2024年第3期96-100,107,共6页Grassland and Turf

基　　金：国家重点研发计划(2018YFD0502402-3);国家自然科学基金项目(31760702);甘肃省草地畜牧业可持续发展创新团队项目(2017C-11)。

摘　　要：【目的】探究饲用小黑麦草产量的主要影响因素。【方法】以石大1号小黑麦与甘农7号小黑麦构建的重组自交系(RIL)群体为材料,对F6代273个单株的6个草产量相关性状(株高、分蘖数、旗叶长、旗叶宽、穗下节间长和单株鲜重)进行表型鉴定和统计分析。【结果】6个性状变异系数范围为9.68%~64.10%,其中单株鲜重最大,其次是分蘖数、穗下节间长和株高,最后是旗叶长和旗叶宽;单株鲜重与分蘖数的相关系数最大(0.764),与穗下节间长的相关系数最小(0.052)。【结论】主成分分析将草产量相关性状综合为生物量构成因子和株高构成因子,累积贡献率为70.81%。本研究可为饲用小黑麦新品种选育提供参考。【Objective】In order to explore the main influencing factors of the yield of forage-type triticale.【Method】The recombinant inbred line(RIL)population constructed from′Shida No.1′triticale and′Gannong No.7′triticale was used as the research object and the phenotypic identification and statistical analysis of 6 grass yield-related traits(plant height,tiller number,flag leaf length,flag leaf width,internode length under panicle and fresh weight per plant)of 273 plants of F6 generation were carried out.【Result】The results showed that the coefficient of variation ranged from 9.68%to 64.10%.The coefficient of variation of the fresh weight per plant was the largest,fol⁃lowed by those of the number of tillers,the length of the internodes under the panicle,the height of the plant,and the length of the flag leaf.And the coefficient of variation of the width of the flag leaf was the smallest.The correlation co⁃efficient between fresh weight per plant and the number of tillers was the largest(0.764),the correlation coefficient with internode length below spike is the smallest(0.052).【Conclusion】By principal component analysis,the grass yield-related traits were integrated into biomass components and plant height components,and the cumulative contri⁃bution rate reached 70.81%.This study could provide a reference for the selection and breeding of new varieties of forage triticale.

关 键 词：小黑麦 RIL群体 草产量相关性状 

分 类 号：S816.43[农业科学—饲料科学]