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| Genomic Structure and Runs of Homozygosity Analyses of Different Landes Goose (Anser anser domesticus) Populations |
| ZHANG Ting1,2,*, CHENG Si-Bei1,*, ZHANG Xin1,2, YE Fei1, GUAN Yuan-Xin1, QU Ke2, QI Xiao-Min3, XIANG Hai1,**, ZHANG Xing1,4,** |
1 College of Animal Science and Technology/Guangdong Provincial Key Laboratory of Animal Molecular Design and Precise Breeding, Foshan University, Foshan 528225, China;
2 Jining City Animal and Veterinary Development Center, Jining 272002, China;
3 Shandong Jinxin Landes Goose Ltd. Company, Jining 272200, China;
4 Animal Genetic Breeding and Reproduction Key Laboratory of Sichuan Province/Sichuan Animal Science Academy, Chengdu 610066, China |
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Abstract Since its introduction to China for more than two decades, the Landes goose (Anser anser domesticus) has formed adapted populations in several regions of the country. This study conducted whole-genome sequencing for 30 individual Jining Landes goose and downloaded the genomic data for 46 samples representing Jiangxi and French Landes goose, along with swan goose (Anser cygnoides) and grey goose (Anser anser), from the NCBI database, and then proceeded to analyze the genetic structure, runs of homozygosity (ROH), and inbreeding coefficients based on the mitochondrial genome and the whole genome information. The objective of this study was to ascertain the genetic structure and diversity of various populations of Landes geese, with the aim of providing theoretical reference for their conservation, development, and utilization in China. The results showed that the Landes goose populations in Jining and Jiangxi exhibited a conspicuous genetic affinity with the French Landes goose. However, these populations evolved to possess a more distinct population structure over the course of their long-term utilization in China. Furthermore, a degree of differentiation emerged between the 2 Landes goose populations in Jining and Jiangxi. The 3 Landes goose populations were observed to exhibit high genetic diversity. However, a comparison of the genetic diversity of the Jining Landes goose population with those of the Jiangxi and French Landes goose populations revealed that the former was lower. These findings indicated that the Jining Landes goose population experienced a greater degree of genetic diversity compared to the Jiangxi and French populations. In regard to the genetic structure, the Jining Landes goose sustained its distinct lineage, initially developing 2 relatively autonomous subgroups. A subset of this group undergone a gradual differentiation from the Jiangxi and French Landes goose groups. The Jining Landes goose group exhibited higher numbers and lengths of ROH compared to the Jiangxi and French groups. This finding suggested that artificial selection and inbreeding played a more significant role in the evolution of the Jining Landes goose group. The degree of inbreeding in the Jining Landes goose group was higher than that of the Jiangxi and French Landes goose groups which indicated that artificial selection and inbreeding played a more significant role in the Jining Landes goose group. The inbreeding coefficient of the Jining Landes goose group was found to be higher than that of the other 2 groups, however, the overall inbreeding level was found to be similar to that of other local goose breeds in China. The results of this study provide a theoretical basis for the conservation and utilization of the Landes goose in China.
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Received: 28 July 2025
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Corresponding Authors:
** xh@fosu.edu.cn; zx7144@163.com
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| About author:: *These authors contributed equally to this work |
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