Jiyi Gong^1* , Xin Kong^1* , Jianfeng Wang^2,3 , Li Wang¹ , Xianlei Chen¹ , Feng Shao⁴ , Yuke Li¹ , Xiaoxia Zhang⁵ , Ping Zhang¹ , Ming Tang¹ , Yin Yi¹

1 Key Laboratory of National Forestry and Grassland Administration on Biodiversity Conservation in Karst Mountains Areas of Southwest China, Key Laboratory of Plant Physiology and Developmental Regulation, School of Life Science, Guizhou Normal University, Guiyang, 550001, China
2 State Key Laboratory of Grassland Agroecosystems, Grassland Microbiology Research Center, Collaborative Innovation Center for Western Ecological Safety, Lanzhou University, Lanzhou, 730000, China
3 State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, 810016, China
4 Xiuwen County Bureau of Agriculture and Rural Affairs, Guiyang, 550299, China
5 Qiushi College of Guizhou Normal University, Guiyang, 550014, China
* These authors contributed equally to this work
Author    Correspondence author
Molecular Plant Breeding, 2022, Vol. 13, No. 12   doi: 10.5376/mpb.2022.13.0012
Received: 17 Mar., 2022    Accepted: 18 Apr., 2022    Published: 29 Apr., 2022

This is an open access article published under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Gong J.Y., Kong X., Wang J.F., Wang L., Chen X.L., Shao F., Li Y.K., Zhang X.X., Zhang P., Tang M., and Yi Y., 2022, Study on the genetic relationship of pepper based on fruit traits and molecular markers, Molecular Plant Breeding, 13(12): 1-10 (doi: 10.5376/mpb.2022.13.0012)

To explore the genetic diversity of pepper germplasm resources in China and to improve the efficiency of pepper breeding. In this study, 45 pepper germplasm resources that came from USA and Guizhou province, China, were used to explore the quantitative traits of pepper fruits, and the ISSR analysis of germplasm resources genetic diversity. The results showed that the variance among eight quantitative traits of 45 peppers have a significant variation. The average genetic variation coefficient was 70.7%, and there were intricate correlations among the eight quantitative traits. Based on the fruit number traits, 45 pepper germplasms were clearly classified into six taxa by cluster analysis. The genetic diversity of pepper germplasm resources can be evaluated more accurately by molecular markers and phenotypic traits. This study provides a scientific basis for identification and evaluation of pepper germplasm resources, the selection of superior quality traits, and the selection of parents for crossbreeding.

Pepper; Morphological characteristics; Molecular markers; Genetic relationship