Table 1. Comparison between ALDB and related databases.

Database	lncRNA*	Expression	QTL	Source	Species	Description	Ref
NONCODE	16188**	Human, mouse	×	Literature	10 species	An integrated knowledge database of non-coding RNAs; http://www.noncode.org/	[13]
lncRNAdb	16	Human, mouse	×	Literature	Around 60 species	A reference database for long noncoding RNAs; http://www.lncrnadb.org/	[14]
PLncDB	0	Arabidopsis	×	Tiling Arrays, RNA-seq	Arabidopsis	A plant long noncoding RNA database; http://chualab.rockefeller.edu/gbrowse2/homepage.html	[18]
NRED	0	Human, mouse	×	Design arrays	Human, mouse	A database of long noncoding RNA expression; http://nred.matticklab.com/cgi-bin/ncrnadb.pl	[19]
LncRNADisease	0	×	×	Literature	Human	A database for long-non-coding RNA-associated diseases;http://www.cuilab.cn/lncrnadisease	[20]
LNCipedia	0	×	×	Literature	Human	A comprehensive compendium of human long non-coding RNAs; http://www.lncipedia.org/	[21]
The Functional lncRNA Database	0	×	×	Literature	Human, mouse, rat	A repository of mammalian long non-protein-coding transcripts that have been experimentally shown to be both non-coding and functional; http://www.valadkhanlab.org/database	[22]
ChIPBase	0	Human	×	ChIP-Seq	6 species	A database for decoding the transcriptional regulation of long non-coding RNA and microRNA genes from ChIP-Seq data; http://deepbase.sysu.edu.cn/chipbase/	[23]
starBase	0	×	×	CLIP-Seq	Human, mouse, Caenorhabditis elegans	Decoding miRNA-ceRNA, miRNA-ncRNA and protein-RNA interaction networks from large-scale CLIP-Seq data; http://starbase.sysu.edu.cn/	[24]
ALDB	29276	Pig, chicken, cow	Pig, chicken, cow	RNA-seq, EST	Pig, chicken, cow	A domestic-animal long noncoding RNA database; http://res.xaut.edu.cn/aldb/

* The number of domestic animal lncRNA transcripts.

** 16,188 chicken lncRNA transcripts were gathered from an unpublished source.