Table 1.

Differentially expressed genes in the head samples of the alfalfa and pea biotypes reared on the universal and specific host plants.

Contrast	# of DE genesa	# of DE effector genesb
Plant effect (universal vs. specific)
• in alfalfa biotype	6	0
• in pea biotype Total	12 16	4 4
Biotype effect (alfalfa vs. pea)c	689	255
Line effect (line vs. line)d
• in alfalfa biotype	6583	1934
• in pea biotype Total	2165 7207	697 2116

^aNumber of protein-coding genes that are differentially expressed with a FDR < 0.05 and a FC > 1.5 (from overall set of 18,601 protein coding genes existing in the NCBI Acyrthosiphon pisum Annotation Release 102).

^bNumber of differentially expressed genes that are considered as candidate salivary effectors (from overall set of 3,546 candidate salivary genes).

^cIn addition to FDR and FC filtering, a Student t-test was applied to exclude DE genes that showed high intra-biotype variability.

^dThe line effect is computed independently in each biotype and a gene is considered as DE when a FDR < 0.05 and a FC > 1.5 are observed between at least two of the three lines that constitute each biotype.