Mechanisms of haplotype divergence at the RGA08 nucleotide-binding leucine-rich repeat gene locus in wild banana (Musa balbisiana)

Table 1 Features of M. balbisian a BAC sequences containing RGA08 clusters

	RGA cluster		Flanking sequences
	B1	B2	B1	B2
Size (bp)	151959	131218	101407	92476
Exons & ψexons (%)	36.1	33.7	18.1	19.1
Introns & ψintrons (%)	13.4	13.3	33.7	30.1
Intergenic (%)	33.6	36.7	42.9	49.9
TE (%)	15.7	15.3	4.4	0
SSR (%)	1.2	0.9	0.9	0.9
Gene & ψgene density (kb/gene)	6.9	6.6	6	5.4
Total predicted gene & ψgene number (RGA & ψRGA)	22 (18)	20 (13)	17	17
ψgene number (ψRGA)	12 (8)	14 (7)	4	4
Number of exon/gene	1	1	5.2	5.7
Number of gene & ψgene on the direct strand	4	3	10	11
Number of gene & ψgene on the complementary strand	18	17	7	6

Percentages of exons and ψexons, introns and ψintrons, TE and SSR were computed according to the size of the nucleotide sequence. Percentage of intergenic sequences represents the rest of the sequence. In these statistics, the five and four Gag-Polymerase -encoding genes of B1 and B2 respectively, were not taken into account. ψ, pseudogene; TE, transposable element; SSR, simple sequence repeat; RGA, resistance gene analog.

ISSN: 1471-2229