In this study, seven LysM-RLK subfamily genes were systematically identified in the whole genome of papaya using bioinformatics methods, and the chromosome distribution, gene structure, protein physical and chemical properties, and subcellular localization information were analyzed. Familial evolutionary analysis showed that papaya LysM-RLK could be further divided into three subgroups (Lym-Ⅱ, Lym-Ⅲ, Lym-Ⅳ), distributed on four chromosomes. Recent gene replication is the main driver of the evolution of the papaya LysM-RLK subfamily. The analysis of promoter sequence regulatory elements found that it contained multiple photoresponse elements and elements involved in low temperature response and stress related hormone signal response. Large-scale comparative transcriptome analysis systematically analyzed the gene expression patterns of LysM-RLK under papaya biostress and abiotic stress and different tissues, revealing its specific expression patterns and potential biological functions. The expression differentiation of replicating gene pairs, differences in domain composition, and changes in the tertiary structure of proteins suggest subfunctionalization in the process of evolution. Core co-expression network analysis under biotic and abiotic stress conditions identified 27 core genes strongly associated with LysM-RLK3, revealing the potential transcriptional regulatory patterns of LysM-RLK3. The results would provide important insights into the evolution, functional differentiation and role of the papaya LysM-RLK subfamily in adversity response and growth and development.
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |