文献类型： 外文期刊
作者： Guo, Rui 1 ; Li, Tingting 1 ; Zhang, Quanguo 1 ; Wang, Jianghao 1 ; Guo, Jinjie 2 ; Wang, Liwei 3 ; Song, Liang 3 ; Yan, Yuanyuan 3 ; Zhang, Dongmin 1 ; Wei, Jianfeng 1 ; Li, Xinghua 1 ; Song, Wei 1 ;
作者机构： 1.Hebei Acad Agr & Forestry Sci, Key Lab Crop Genet & Breeding Hebei Prov, Inst Cereal & Oil Crops, Shijiazhuang 050035, Peoples R China
2.Hebei Agr Univ, Coll Agron, State Key Lab North China Crop Improvement & Regul, Hebei Sub Ctr Natl Maize Improvement Ctr, Baoding 071001, Hebei, Peoples R China
3.Hebei Acad Agr & Forestry Sci, Inst Cereal & Oil Crops, Hebei Key Lab Crop Cultivat Physiol & Green Prod, Shijiazhuang 050035, Peoples R China
关键词： maize; landrace; genetic diversity; cluster analysis; heterotic groups
期刊名称：AGRONOMY-BASEL （ 影响因子：3.3； 五年影响因子：3.7 ）
ISSN：
年卷期： 2024 年 14 卷 6 期
页码：
收录情况： SCI
摘要： Maize productivity in the central belt plays a significant role in the food security of China. With good adaptability and disease resistance, landrace germplasm is important for maize improvement. A total of 246 landrace accessions were collected from the maize belts in central China and genotyped with the SLAF-seq (Specific-Locus Amplified Fragment Sequencing) method, and 144,650 SNPs were obtained for each accession. The results showed that the landrace accessions could be divided into three major groups. In the cluster results, Group I included 64 accessions, which mainly belonged to the landrace of White horse teeth; Group II had 71 accessions, which mainly belonged to the lantern red landraces; the rest of the 116 accessions were clustered as Group III, including a variety of types landraces and seven indicator inbred lines. In the results of structure and multidimensional scaling, the accessions' attribution differed with the clusters, the main reason for which is the attribution change in intermediate germplasms. Linkage disequilibrium decay distance was 0.98 kb, which was much lower than that of temperate and tropical maize inbred lines, indicated the much higher genetic diversity of landrace germplasms. The results can help us select suitable landrace germplasms and speed up the process of inbred line development and maize improvement.
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