Fig. 3
From: Gut microbial diversity among Yorkshire, Landrace and Duroc boars and its impact on semen quality
A Correlation analysis between three varieties and environmental factors; B Correlation analysis between the top ten species of genus level abundance and environmental factors. The scale on the horizontal and vertical coordinates are the values generated by each sample or species in the regression analysis calculation with environmental factors; points represent samples; the relationship between element points and points in the figure is represented by distance, the closer the distance is, the sample is represented composition is similar; the relationship between rays and rays is represented by an included angle. An obtuse angle indicates a negative correlation between the two physiological indicators, and an acute angle represents a positive correlation. The smaller the angle, the higher the correlation. The longer the arrow, the greater the influence on the sample distribution, and the gray arrows represent different environmental factors