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Unformatted text preview: ly Arachis hypogaea L. is
domesticated and commonly cultivated. The taxonomy of the genus Arachis has been well documented and includes 37 named
species and a number of undescribed species. The genus has been divided into nine
sections i.e., Arachis, Caulorrhizae, Erectoides, Extranervosae, Heteranthae,
Procumbentes, Rhizomatosae, Trierectoides and Triseminalae. The section Arachis
comprises an annual and perennial diploid (2n = 20) and two annual tetraploids (2n = 4x =
40). The leaves of Arachis hypogaea L. are tetrafoliolate, and plants are typically erect or
decumbent and pegs penetrate the soil at an angle of approximately 45°. Most of the earlier
classifications of Arachis hypogaea L. were based on growth habit, presence or absence of
seed dormancy and relative time to maturity. In later classifications, characters such as
branching pattern and location of reproductive branches have been included. Cultivated groundnuts are divided into two large botanical groups, Virginia and SpanishValencia, on the basis...
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This document was uploaded on 02/23/2014.
- Spring '14