taproot

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taproot

a primary ROOT structure in which one main root forms the major part of the underground system. Taproots are often swollen, serving as storage organs of perennation. Many vegetable crops, such as carrot, swede, sugar beet, have taproots.
References in periodicals archive ?
The second cycle populations of HF or LF underwent one subsequent cycle of divergent selection for lateral roots resulting in HF and LF populations with either many lateral roots (branched roots, BRH) or few or no lateral roots (taprooted, TAP).
(1998) also showed that modern (released after 1980) alfalfa cultivars adapted to the upper Midwest were mostly taprooted with little variation in the number of lateral roots or amount of fibrous root mass.
Newer cultivars tended to be taprooted, with more and smaller secondary roots, and more fibrous roots than older cultivars of similar winter hardiness.