biostudies-literatureGou JScience and Technology Research Program of the Chongqing Education CommissionNatural Science Foundation of Chinathe Project of National Key Laboratory for Tropical Crop BreedingGuangdong province Litchi and Longan Industry Technology SystemGuangxi Science and Technology Plan Project418https://www.ebi.ac.uk/biostudies/studies/S-EPMC11963673biostudies-literatureUnknown25(1)Longans are among the most economically important subtropical fruits. Its flowering is sensitive to the photoperiod, and flowering time has a significant influence on yield and quality. CONSTANS-like (COL) gene plays a key role in regulating induced flowering in longans. However, the specific role of the COL gene family in the regulation of flowering remains unknown. In this study, 10 DlCOL genes were identified in longans using comprehensive bioinformatics analysis and named based on their physical chromosomal locations. Phylogenetic tree analysis showed that DlCOL genes were divided into three subfamilies, each with a conserved domain. When combined with collinearity analysis, we found DlCOL genes were more closely related to COL genes of dicotyledons. DlCOL family genes are differentialBMC plant biologyGenome-wide identification and functional analysis of the longan CONSTANS (CO) family.PMC11963673KJQN2023013012024CXTD19KJQN202401302NKLTCBCXTD11AB24148402033272674Liu YSang XLiu LZhang ZShi SCao JJue DGou JRen CfalseGenome-wide identification and functional analysis of the longan CONSTANS (CO) family.Longans are among the most economically important subtropical fruits. Its flowering is sensitive to the photoperiod, and flowering time has a significant influence on yield and quality. CONSTANS-like (COL) gene plays a key role in regulating induced flowering in longans. However, the specific role of the COL gene family in the regulation of flowering remains unknown. In this study, 10 DlCOL genes were identified in longans using comprehensive bioinformatics analysis and named based on their physical chromosomal locations. Phylogenetic tree analysis showed that DlCOL genes were divided into three subfamilies, each with a conserved domain. When combined with collinearity analysis, we found DlCOL genes were more closely related to COL genes of dicotyledons. DlCOL family genes are differential2025-01-01T00:00:00Z2025 Apr2026-05-28T03:13:17.606Z2025-06-26T03:06:01.18ZS-EPMC119636734017588410.1186/s12870-025-06451-8