Table 2.

Mapping of breeding objective traits in Japan

Parents of population	Population size	Trait	Linkage group	Reference
Kiyomi × Miyagawa wase	125	Seed number (QTL)	6	Omura et al. 2003
Kiyomi × Miyagawa wase	125	Polyembryony	1	Nakano et al. 2012
Kiyomi × Okitsu­41	92	Male sterility	8	Nakano et al. 2003
Nou­8 × Shiamese acidless	92	CTV resistance	2	Ohta et al. 2011
Okitsu­46 × Nou­5	87	Seedlessness	9	Shimada et al. 2014a
Okitsu­46 × Nou­5	87	Carotenoids (QTL)	6	Sugiyama et al. 2011

‘Kiyomi’is derived from the cross between ‘Miyagawa wase’ (C. unshiu Marc.) and ‘Trovita’ orange (C. sinensis (L.) Osbeck).

Okistu-41 is selected breeding line derived from the cross between ‘Kiyomi’ and × ‘Wilking’(‘King’ tangor (C. nobilis Lour.) × ‘Willowleaf’ mandarin (C. deliciosa Ten.).

Okistu-46 is selected breeding line derived from the cross between ‘Sweet spring’ (‘Ueda unshiu’ (C. unshiu Marc.) × Hassaku (C. hassaku hort. ex Tanaka)) and ‘Trovita’ orange.

Nou-8 is a CTV resistant line derived from the cross between ‘Kiyomi’ and ‘H·FD-1’ (Hassaku × ‘Hiryu’ (P. trifoliata var. monstrosa)).

‘Siamese acidless’ is acidless variety of pummelo (Citrus grandis [L.] Osb.).

Nou-5 is a seedless line derived from the cross between ‘Lee’ (Clementine (C. clementina hort. ex Tanaka) and ‘Orland’ (‘Dancy tangerine’ × ‘Duncan’ grapefruit)) and ‘Mukaku kishiu’ (C. kinokuni hort. ex Tanaka).

Only the QTL showing the highest LOD score.