Table 1. Description of the Libraries Subjected to RNA-Seq.

Library Description	No. of Reads	No. of Mapped Reads (%)	Mean Read Length (bp)
Total mock Rep no. 1	85578290	80148813 (93.3)	100
Total mock Rep no. 2	46365630	37188663 (80.2)	101
Total Sm Rep no. 1	71569736	66843904 (93.4)	100
Total Sm Rep no. 2	42000504	38988734 (92.8)	101
TRAP mock Rep no. 1	72405126	66465623 (91.8)	100
TRAP mock Rep no. 2	42234292	38988734 (92.3)	101
TRAP Sm Rep no. 1	77669944	71543211 (92.1)	100
TRAP Sm Rep no. 2	38198292	32042020 (83.8)	101

Total number of reads obtained in total and TRAP Illumina RNA-seq libraries per independent biological replicate (Rep). Each data set was obtained from paired-end sequencing in HiSeq 2000 and mapped against the M. truncatula genome v4 using TopHat2. Data were retrieved from align summary output files of TopHat2.