Comprehensive analysis of the full-length transcripts and alternative splicing involved in clubroot resistance in Chinese cabbage oleh He-nan SU, Yu-xiang YUAN, Shuang-juan YANG, Xiao-chun WEI, Yan-yan ZHAO, Zhi-yong WANG, Liu-yue QIN, Zhi-yuan YANG, Liu-jing NIU, Lin LI, Xiao-wei ZHANG