Table 2.

Copy number estimates for Ty1-copia elements

Species	Copy number	Method of estimation	Reference
O. sativa	100	Hybridization to BAC library	20
A. thaliana	310	Sequence similarity	TE Database†
V. melanops	1,000	Slot blot	6
L. esculentum	2,500	Slot blot	19
P. sativum	4,000	Hybridization to BAC library	21
V. sativa	5,000	Slot blot	6
Z. mays	50,000	Southern blot	1
T. aestivum	80,000	Slot blot	37
H. vulgare	196,000	Slot blot	37
P. abies	0.5–1.0 × 106*	Southern blot	38
V. faba	106	Slot blot	6

Species listed in order of increasing copy number. BAC, bacterial artificial chromosome. 

^*Based on the estimate that 10–20% of the genome is composed of copia-like elements. 

^† www.tebureau.mcgill.ca/clonebase/mainpage.html.