Table 1 Monogenic TGRC mutant lines exhibiting significant root phenotype

aerial roots (aer)

Adventitious roots on stem from soil level to considerable height above

Yes

unknown

(Philouze, 1971)

aerial roots-2 (aer-2)

Abundance of root initials along the stems.

Yes

unknown

(Kerr, 1982)

baby lea syndrome (bls)

Anthocyaninless; restricted root system; short internodes, leaves, and trusses

No

chr 3

(Clayberg et al., 1966)

bushy root (brt)

Radical branches early; radical and root profusely branched; root tips twisting upwards, not dense growth.

Yes

chr 12

(Zobel, 1972)

bushy root 2 (brt-2)

Severely stunted growth (1/20) dense bushy growth of twisted roots

Yes

chr 4

(Voland and Zobel, 1988)

cottony root (crt)

Overgrown root hairs with cottony appearance

Yes

unknown

(Hochmuth, 1985)

decumbens (dec)

Lax and decumbent habit; early fruiting

No

unknown

(Stubbe, 1959)

diageotropica (dgt)

Plant habit prostrate due to reduced gravitropic response; growth retarded; stems and leaves droopy; cotyledons concave. Roots grow horizontally rather than downwards; no lateral root formation.

No

Solyc01g111170

(Oh et al., 2006)

dwarf root (drt)

Reduced hypocotyl and internodes, compact root phenotype

Yes

chr 2

(Voland and Zobel, 1988)

lembiformis (le)

Prostrate, smaller plant, proportionately reduced; keeled or involuted yellowish pinnae, ventrally purplish.

No

unknown

(Stubbe, 1964)

ridged (ri)

Ridged leaves; retarded growth of shoots and roots.

No

chr 6

(Lindstrom, 1933)

Root suppressed (Rs)

Greatly restricted or no root development

Yes

chr 4

(Yu, S. -a. and Yeager, A.F., 1960)

umbrosa (um)

Mature leaves darker green, wilted appearance; later growth stunted; reduced root growth

No

chr 1

(Stubbe, 1958)

wilty dwarf (wd)

Greyish-green, droopy leaves; stunted plants; leaves droop when drought stressed

Yes

chr 9

(Rick and Khush, 1961)