‘Murasaki-29’ sweetpotato [Ipomoea batatas (L.) Lam.] was developed by the Louisiana Agricultural Experiment Station to provide a specialty-type white flesh, dark purple skin cultivar with southern root-knot nematode and soil rot resistance. ‘Murasaki-29’ produces excellent numbers of uniform plants (sprouts) early in the production season. ‘Murasaki-29’ matures later than ‘Beauregard’ in Louisiana. The roots in Louisiana can be elliptical, but often are round and sometimes splits occur. Production for fresh market is not anticipated in Louisiana as a result of its inconsistent appearance. In California, yields are competitive with other specialty white flesh types. Broad-spectrum disease resistance, including soil rot and southern root-knot nematode resistance, is desirable, and color and root shape are favorable.
Initially identified and evaluated as L01-29, the cultivar is named after the Japanese word for purple (murasaki). The dark purple skin is its most distinguishing characteristic and similar in coloration to the Japanese variety ‘Kotobuki’.