Abstract:In order to exploit the NBS-LRR resistance genes of Ipomoea triloba, a close wild relative of I. batatas, the genome sequence was screened, identified and analyzed by using pertinent software. The results showed that among the 98 025 genes identified from I. triloba, there are 282 genes encoding NBS-LRR proteins, including 80 N type, 83 NL type, 28 CN type, 57 CNL type, 10 TN type, 23 TNL and 1 RN type. NBS-LRR family genes were located in all of 16 chromosomes, each containing 1 to 65 genes. There were 55 gene clusters in genome of I. triloba, containing 63.5% of the NBS-LRR family genes. There were 7 and 11 conservative domains in CNL and TNL subfamilies, respectively. Therefore, these would provide a scientific reference for utilization of resistance resource in I. triloba.