A Genetic Linkage Map of BC2 Population Reveals QTL Associated with Plant Architecture Traits in Lagerstroemia
文献类型： 外文期刊
作者： Zhou, Yang 1 ; Ye, Yuanjun 1 ; Feng, Lu 1 ; Zhang, Ye 1 ; Lin, Qifang 1 ; Liu, Jieru 1 ; Cai, Ming 1 ; Wang, Jia 1 ; Cheng, 1 ;
作者机构： 1.Beijing Forestry Univ, Beijing Lab Urban & Rural Ecol Environm,Beijing M, Beijing Key Lab Ornamental Plants Germplasm Innov, Beijing Municipal Educ Commiss,Coll Landscape Arc, Beijing 100083, Peoples R China
2.Guangdong Acad Agr Sci, Guangdong Prov Key Lab Ornamental Plant Germplasm, Environm Hort Res Inst, Guangzhou 510640, Peoples R China
关键词： Lagerstroemia; genetic map; QTL; plant height; branching; internode length
期刊名称：FORESTS （ 影响因子：2.221； 五年影响因子：2.484 ）
ISSN：
年卷期： 2021 年 12 卷 3 期
页码：
收录情况： SCI
摘要： Plant architecture improvement is of great significance in influencing crop yield, harvesting efficiency and ornamental value, by changing the spatial structure of the canopy. However, the mechanism on plant architecture in woody plants is still unclear. In order to study the genetic control of plant architecture traits and promote marker-assisted selection (MAS), a genetic linkage map was constructed, and QTL mapping was performed. In this study, using 188 BC2 progenies as materials, a genetic map of Lagerstroemia was constructed using amplification fragment length polymorphisms (AFLP) and simple sequence repeats (SSR) markers, and the QTLs of four key plant architecture traits (plant height, crown width, primary lateral branch height and internode length) were analyzed. The genetic map contains 22 linkage groups, including 198 AFLP markers and 36 SSR markers. The total length of the genome covered by the map is 1272 cM, and the average distance between markers is 6.8 cM. Three QTLs related to plant height were located in LG1, LG4 and LG17 linkage groups, and the phenotypic variation rates were 32.36, 16.18 and 12.73%, respectively. A QTL related to crown width was located in LG1 linkage group, and the phenotypic variation rate was 18.07%. Two QTLs related to primary lateral branch height were located in the LG1 and LG7 linkage groups, and the phenotypic variation rates were 20.59 and 15.34%, respectively. Two QTLs related to internode length were located in the LG1 and LG20 linkage groups, and the phenotypic variation rates were 14.86 and 9.87%. The results provide a scientific basis for finely mapping genes of plant architecture traits and marker-assisted breeding in Lagerstroemia.
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