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【Objective】 Irrigation methods modulate soil water and root-induced activity thereby influencing gas emissions from soil. In this paper, we analyze the effects of different irrigation methods on greenhouse gas emissions from farmland and the associated underlying mechanisms. 【Method】 The analysis was based on meta-analysis. Experimental results published in journals included in CNKI and Web of Science were used in the analysis. A total of 37 papers with 176 datasets were analyzed to assess the variation in greenhouse gas emissions with irrigation methods, as well as the underlying mechanisms. 【Result】 Compared to drip irrigation, flood irrigation, furrow irrigation and subsurface drip irrigation did not show significant difference in CO2 emissions, while sprinkler irrigation significantly increased CO2 emissions (p

Simple Summary: This study focused on 50 Hu sheep from Gansu to analyze the genetic diversity and kinship relationships within the population and to construct family pedigrees. Candidate genes related to growth development and high reproductive performance in Hu sheep were identified. These findings provide a reference for future Hu sheep breeding, genetic evaluation, and population utilization. This research is designed to examine the genetic diversity and kinship among Hu sheep, as well as to discover genes associated with crucial economic traits. A selection of 50 unrelated adult male Hu sheep underwent genotyping with the SNP50K BeadChip. Seven indicators of genetic diversity were assessed based on high-quality SNP data: effective population size (Ne), polymorphic information content (PIC), polymorphic marker ratio (PN), expected heterozygosity (He), observed heterozygosity (Ho), effective number of alleles, and minor allele frequency (MAF). Plink software was employed to compute the IBS genetic distance matrix and detect runs of homozygosity (ROHs), while the G matrix and principal component analysis were performed using GCTA software. Selective sweep analysis was carried out using ROH, Pi, and Tajima's D methodologies. This study identified a total of 64,734 SNPs, of which 56,522 SNPs remained for downstream analysis after quality control. The population displayed relatively high genetic diversity. The 50 Hu sheep were ultimately grouped into 12 distinct families, with families 6, 8, and 10 having the highest numbers of individuals, each consisting of 6 sheep. Furthermore, a total of 294 ROHs were detected, with the majority having lengths between 1 and 5 Mb, and the inbreeding coefficient FROH was 0.01. In addition, 41, 440, and 994 candidate genes were identified by ROH, Pi, and Tajima's D methods, respectively, with 3 genes overlapping (BMPR1B, KCNIP4, and FAM13A). These results offer valuable insights for future Hu sheep breeding, genetic assessment, and population management. [ABSTRACT FROM AUTHOR]

The Longnan goat (LN) is a local breed discovered during the third census of China's livestock and poultry genetic resources. In order to thoroughly comprehend the population traits, this research examined a total of 70 animals from three different goat populations, namely the LN goat, Nanjiang Brown goat (NJ), and Boer goat (Boer). Specific‐Locus Amplified Fragment Sequencing was employed to analyze genetic diversity, population structure, and selective sweep patterns. Additionally, individual DNA fingerprints were generated to provide detailed genetic profiles for each subject. A total of 643,868 single nucleotide polymorphisms (SNPs) were detected, with a majority located in intergenic and intronic regions. Genetic diversity analysis uncovered lower diversity within the LN population compared to the other two populations. The analysis of population structure unveiled significant genetic distance between LN and both NJ and Boer populations, with distinct clustering patterns observed. Moreover, genetic differentiation coefficients (FST) of 0.1019 and 0.0854 were determined between LN and Boer, as well as LN and NJ, respectively, indicating substantial genetic differentiation. Selective sweep analysis, combining FST and π ratio, identified several genes associated with growth and development, reproduction, hair color, and immunity that may serve as valuable candidates for marker‐assisted breeding. Furthermore, identification of 47,541 runs of homozygosity (ROHs) revealed non‐uniform distribution across chromosomes, with the highest frequency on chromosome 1 and the lowest on chromosome 27. Correlations between different inbreeding coefficients varied, with the highest observed between FHOM and FGRM, and the lowest between FROH >1.5Mb and FROH <500kb. A total of 46 candidate genes were annotated within high‐frequency ROH islands, primarily associated with biological processes such as reproduction, growth and development, and immunity. Finally, a DNA fingerprint, consisting of 371 highly polymorphic SNPs, was generated and presented in the form of a two‐dimensional code for convenient access. Based on the population structure analysis, LN goats have been found to have a distant genetic distance and a higher degree of differentiation from both the Boer and NJ populations. Evaluation of genetic diversity parameters and ROH analysis indicates that the LN population exhibits lower genetic diversity and shows signs of inbreeding. Our findings offer theoretical support for the identification of genetic resources within this population. [ABSTRACT FROM AUTHOR]