Abstract: An image shooting method and apparatus, an electronic device, and a readable storage medium and pertains to the field of image processing. The specific implementation includes receiving a first input for triggering image shooting; obtaining, in response to the first input, multiple frames of first images shot by the first camera and multiple frames of second images shot by the second camera, where in an image shooting process, the free gimbal controls an actual shooting position of the first camera to remain unchanged, and the fixed gimbal controls the second camera to move along with the electronic device; and compositing the multiple frames of first images and the multiple frames of second images to obtain a composite image.

Abstract: A molecular marker for the selection and breeding of fine-wool sheep is disclosed. The marker is an STR marker comprising a (CA)n repeat core sequence, with n between 5 and 24 that can be obtained by PCR amplification of genomic DNA of sheep using the primers shown in SEQ ID NO: 1 and SEQ ID NO: 2 and sequencing the PCR product. When n is 17 or 18, a sheep is a fine-wool breed, and when n is 23 or 24, a sheep is a non-fine-wool breed. When the CA repeat is discontinuous, i.e., divided into two segments (e.g., 12+11 or 13+11) separated by two bases TA or GA, a sheep is a hybrid breed of fine-wool sheep and non-fine-wool sheep. Use of the marker provides methods of identifying of fine-wool sheep breeds, and efficient and accurate selection of fine-wool sheep or the hybrid offspring of fine-wool sheep for breeding.