Introgression of cytoplasmic male sterility (CMS) in tropical carrots (Daucus carota subsp. sativus Schubl. & Martens)

Abstract

The petaloid-CMS plants identified in naturally occurring
open-pollinated population were used for introgression of
male sterility in two varieties (Kashi Arun and Kashi Krishna)
and 11 advanced elite materials of tropical carrot through
backcrossing at ICAR-IIVR, Jakhini, Varanasi, UP. The
tropical varieties and elite materials having diverse
morphological backgrounds i.e. root colour (Red, Orange,
Yellow, Rainbow, Black & White) and root shape (Danvers,
Nantes & Kuroda) were used as recurrent parent in order to
recover their background. Thirteen CMS-lines [VRCAR-211,
VRCAR-212 & VRCAR-214 (red root); VRCAR-231, VRCAR-
234 & VRCAR-241 (orange root); VRCAR-271 & VRCAR-
272 (yellow root), VRCAR-291 & VRCAR-292 (rainbow root),
VRCAR-251 & VRCAR-252 (black root), and VRCAR-331
(white root)] and their respective maintainers were similar in
root colour, root shape and synchronous in flowering/
pollination activities which may be used for heterosis
breeding for development of nutrient-rich hybrids suitable
for tropical/sub-tropical conditions.