Table 3.

Analysis of the three Rb molecular markers developed in this study in a selection of apple rootstocks

		Rb1			Rb2			Rb3
Rb alleles mapped in M432 mapping population/peak size		A	A′	a	B	B′	b	C	C′	c
Apple rootstock	Pedigree	210	212	222	276	296	339	243	252	200	Vigour prediction	Actual vigour
M.1	Unknown	×		×	×					×	V	V
M.2	Unknown		×								V	V
M.6	Unknown	×		×						×	SD	SD
M.7	Unknown		×	×						×	SD	SD
M.9	Unknown	×		×			×		×	×	D	D
M.10	Unknown	×	×			×		×			V	V
M.11	Unknown		×				×	×	×		V	V
M.12	Unknown	×	×					×		×	V	V
M.13	Unknown		×		×	×		×	×		V	V
M.16	Unknown	×		×		×		×		×	V	VV
M.26	M.16 × M.9	×		×		×	×	×		×	D	SD
M.27	M.13 × M.9		×	×		×	×	×		×	D	DD
M.116	M.27 × M.M.106	×	×		×		×		×	×	SI	SI
M.M.106	N. Spy × M.1	×	×		×				×	×	V	V
Mac 9	M.9 open pollination	×					×		×		V	D
Northern Spy	Unknown	×	×						×	×	V	SI
Ottawa 3	Robin Crab × M.9	×	×						×		V	D
Polish 22	M.9 × Common Antonovka	×	×				×		×		V	DD

V: vigorous; SI: semi-invigorating; SD: semi-dwarfing; D: dwarfing; DD: highly dwarfing.