A new species in Section Arachis of peanuts with a D genome

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HT Stalker

Type of Document:
Scholarly Article


American Journal of Botany

Date of Publication:

Place of Publication:
Not Available


Abstract: Arachis glandulifera Stalker is a diploid (2n = 2x = 20) taxon in section Arachis native to eastern Bolivia. Plants of.-I. glandul~fi’ra have longer lateral branches than other taxa of section Arachis, an upright mainstem, prostrate lateral branches, and larger flowers and seeds than other wild species in the section. Fhe pods are greatly reticulated. Glandular trichomes are present on vegetative plant parts and the pe”. Intraspecific hybrids among Ibur accessions are fertile and uniformly have ten bivalents in pollen mother cells. Three accessions had nearly identical karyotypes, while a fourth had subtelocentric chromosomes 6 and 9. Hybrids between .4. glandulifera and two other diploid species of section .lrachis were male. sterile, and chiasmata frequencies ranged between 5.8 and 12.1 per cell. Attempts to hybridize the species with .4. hy*pogaea failed. A are I. new species description and D genomic classification proposed for ..

glandulifira,which is different from p:eviously described A and B genomes of section .lrachis.

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