|Carrot Inbred B7262, p. 2 |
Roots of B7262 are medium long (15-19 cm), cylindrical, and slightly tapered with very
dark purple outer phloem with orange inner phloem, cambium, and xylem and a small
core. Root surface is rough in some growing conditions. Tops of B7262 are fairly tall,
vigorous, and medium green with strong attachment to the root and tendency for early
bolting. Purple coloration is also evident in leaves (especially early in development),
nodes, anthers, and petals. The purple flower color may be useful as an ornamental
especially since the petaloid sterile has a double whorl of persistent petals. Carotene
content of mature roots is 100 to 130 ppm (compared to 70 to 100 ppm for older and 120
to 160 ppm for modern fresh market varieties). Flavor is mild and fairly sweet. B7262
has average tolerance to Alternaria leaf blight and is susceptible to powdery mildew.
Several hybrid combinations with B7262 have been evaluated in Wisconsin, California,
and Florida trials. Purple root pigmentation is a monogenic dominant trait but
penetrance and expressivity varies between hybrids with B7262. Best uniformity for
purple root color occurs in (B2566 x B7262) and (B9304 x B7262). Up to 40 percent
pale purple roots occur in (B7322 x B7262) and (B4367 x B7262). Commercial
development of purple-rooted carrot hybrids may require several purple-rooted inbred
components with this trait.
Breeder's seed of B7262 will be prorated upon written requests before April 1, 1994,
addressed to P.W. Simon, USDA, ARS, Department of Horticulture, 1575 Linden Drive,
University of Wisconsin, Madison, WI 53706.
When this germplasm contributes to a new cultivar, it is requested that appropriate
recognition be given to its source.
|Director, California Agricultural|
|Director, Florda Agricultural|
|Director, Wisconsin Agricultural|