QTL analysis of the developmental changes in cell wall components and forage digestibility in maize(Zea mays L.)

作     者：LI Kun YANG Xue LIU Xiao-gang HU Xiao-jiao WU Yu-jin WANG Qi MA Fei-qian LI Shu-qiang WANG Hong-wu LIU Zhi-fang HUANG Chang-ling LI Kun;YANG Xue;LIU Xiao-gang;HU Xiao-jiao;WU Yu-jin;WANG Qi;MA Fei-qian;LI Shu-qiang;WANG Hong-wu;LIU Zhi-fang;HUANG Chang-ling

作者机构：Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081P.R.China National Engineering Laboratory for Crop Molecular BreedingBeijing 10081P.R.China 

出 版 物：《Journal of Integrative Agriculture》 (农业科学学报（英文版）)

年 卷 期：2022年第21卷第12期

页      面：3501-3513页

核心收录：

学科分类：09[农学] 0901[农学-作物学] 

基　　金：the National Natural Science Foundation of China(31801367) the National Key Research and Development Program of China(2016YFD0101200) the Agricultural Science and Technology Innovation Program of Chinese Academy of Agricultural Sciences 

主　　题：quantitative trait loci maize(Zea mays L.) cell wall components forage quality 

摘      要：Cell wall architecture plays a key role in stalk strength and forage ***,cellulose,and hemicellulose are the three main components of plant cell walls,and they can impact stalk quality by affecting the structure and strength of the cell *** explore cell wall development during secondary cell wall lignification in maize stalks,conventional and conditional genetic mapping were used to identify the dynamic quantitative trait loci(QTLs)of the cell wall components and digestibility traits during five growth stages after *** detergent lignin(ADL),cellulose(CEL),acid detergent fiber(ADF),neutral detergent fiber(NDF),and in vitro dry matter digestibility(IVDMD)were evaluated in a maize recombinant inbred line(RIL)***,CEL,ADF,and NDF gradually increased from 10 to 40 days after silking(DAS),and then they *** initially decreased until 40 DAS,and then it increased *** QTLs were identified for the five traits,and each accounted for 3.48–24.04%of the phenotypic *** QTL hotspots were found,and they were localized in the 1.08,2.04,2.07,7.03,8.05,and 9.03 bins of the maize *** the interval of the pleiotropic QTL identified in bin 1.08 of the maize genome,six genes associated with cell wall component biosynthesis were identified as potential candidate genes for stalk strength as well as cell wall-related *** addition,26 conditional QTLs were detected in the five stages for all of the investigated ***-two of the 26 conditional QTLs were found at 30 DAS conditioned using the values of 20 DAS,and at 50 DAS conditioned using the values of 40 *** results indicated that cell wall-related traits are regulated by many genes,which are specifically expressed at different stages after *** improvements in both forage digestibility and lodging resistance could be achieved by pyramiding multiple beneficial QTL alleles identified in this study.