Screening of Brassica napus L. Germplasms with High Pod Shatter Resistance Based on Fracture Force Index

The corner fruit of rapeseed is easy to crack after maturity, resulting in a high harvest loss rate, which limits the high-quality development of the industry. Screening excellent germplasm resources with crack resistance is of great significance for breeding new varieties of rapeseed with crack resistance. In order to improve the screening efficiency of rapeseed anti-crack Angle resources, this study systematically compared the identification results of fracturing method and random collision method based on 200 Brassica napus L. germplasm resources with abundant variation, and proposed an efficient identification method of anti-crack angle based on fracturing force. It was found that there was a significant positive correlation between the anti-crack angle index based on random collision method and the fracture angle force based on fracturing method. Moreover, fracturing method had better repeatability and higher efficiency than random collision method, and more stability. Based on the correlation between crack angle index and crack angle force, the resistance grading criteria based on fracturing force were established. Finally, 5 excellent germplasm resources with high crack angle of Brassica napus L. were selected based on fracturing force. The results provided an efficient identification method and an important gene resource for further cultivation of high quality crack resistant germplasm resources in rapeseed.