Nitrogen fixation

Sprent, Janet I.

doi:10.1007/978-94-011-0733-4_8

Cited by 6 publications

(3 citation statements)

References 53 publications

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“…There is some evidence to support this suggestion. In the economically important species Arachis hypogaea (groundnut or peanut) there is a considerable degree of promiscuity, leading to problems for introducing improved inoculant strains (Sprent, 1994b), and Rasolomampianina et al . (2005) have recently isolated seven different bacterial genera from nodules of Dalbergia spp.…”

Section: Taxonomic Assessment Of Nodulationmentioning

confidence: 99%

Evolving ideas of legume evolution and diversity: a taxonomic perspective on the occurrence of nodulation

2007

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Section: Taxonomic Assessment Of Nodulationmentioning

confidence: 99%

Evolving ideas of legume evolution and diversity: a taxonomic perspective on the occurrence of nodulation

2007

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“…Seed dry matter is an important source of digestible protein (25 to 34%), cooking oil (44 to 56%) and vitamins such as thiamine, riboflavin, and niacin, which are particularly important for human nutrition in many developing countries [ 2 ]. As a legume, peanuts improve soil fertility by fixing nitrogen, providing up to 60 kg/ha nitrogen to the soil, thus benefiting crops subsequently planted in the same field [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

Development and characterization of BAC-end sequence derived SSRs, and their incorporation into a new higher density genetic map for cultivated peanut (Arachis hypogaea L.)

Wang

Penmetsa

Yüan³

et al. 2012

BMC Plant Biol

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BackgroundCultivated peanut (Arachis hypogaea L.) is an important crop worldwide, valued for its edible oil and digestible protein. It has a very narrow genetic base that may well derive from a relatively recent single polyploidization event. Accordingly molecular markers have low levels of polymorphism and the number of polymorphic molecular markers available for cultivated peanut is still limiting.ResultsHere, we report a large set of BAC-end sequences (BES), use them for developing SSR (BES-SSR) markers, and apply them in genetic linkage mapping. The majority of BESs had no detectable homology to known genes (49.5%) followed by sequences with similarity to known genes (44.3%), and miscellaneous sequences (6.2%) such as transposable element, retroelement, and organelle sequences. A total of 1,424 SSRs were identified from 36,435 BESs. Among these identified SSRs, dinucleotide (47.4%) and trinucleotide (37.1%) SSRs were predominant. The new set of 1,152 SSRs as well as about 4,000 published or unpublished SSRs were screened against two parents of a mapping population, generating 385 polymorphic loci. A genetic linkage map was constructed, consisting of 318 loci onto 21 linkage groups and covering a total of 1,674.4 cM, with an average distance of 5.3 cM between adjacent loci. Two markers related to resistance gene homologs (RGH) were mapped to two different groups, thus anchoring 1 RGH-BAC contig and 1 singleton.ConclusionsThe SSRs mined from BESs will be of use in further molecular analysis of the peanut genome, providing a novel set of markers, genetically anchoring BAC clones, and incorporating gene sequences into a linkage map. This will aid in the identification of markers linked to genes of interest and map-based cloning.

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“…Groundnut roots are usually devoid of hairs and a distinct epidermis. Root hairs disappear a few days after sowing (Porter et al ., 1984; Ramanatha Rao & Murty, 1994; Sprent, 1994). Groundnut roots have a drying and sloughing surface, and absorption occurs mainly in young primary roots with active meristematic cells underlying the drying outer layer.…”

Section: Discussionmentioning

confidence: 99%

Dynamics of Polymyxa graminis and Indian peanut clump virus (IPCV) infection on various monocotyledonous crops and groundnut during the rainy season

et al. 2002

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The progress of Indian peanut clump virus (Hyderabad isolate; IPCV-H) and its vector Polymyxa graminis in various monocotyledonous crops and groundnut was studied during the 1994, 1995 and 1996 rainy seasons in a naturally infested field in India. The roles of rainfall and temperature in the dynamics of infection by both the virus and its vector were analysed by exposing young seedlings for short periods in the field. Of the host crops studied, wheat, followed by barley, showed the highest virus incidence, although P. graminis was rarely observed in roots of wheat and was not detected in those of barley. The roots of maize, pearl millet and sorghum plants infected by P. graminis showed intense colonization by sporosori. IPCV accumulated in systemically infected maize plants; the sorghum and pearl millet cultivars studied showed a transient presence of IPCV-H. Rice was seldom infected by the virus and P. graminis was not detected in its roots. Groundnut was a systemic host for the virus, although during these experiments no P. graminis was found in its roots. Groundnut appeared to be susceptible to infection, mostly in the early stages of crop development, and the rate of IPCV-H transmission in groundnut seeds was highest (13%) for plants infected when young. The seedtransmission rate quickly decreased in plants showing symptoms 1 month after sowing. Time of infection had little influence on groundnut pod yield, which was always reduced by >60% in infected plants. There was some evidence that the quantity and distribution of rainfall influenced the incidences of IPCV-H and P. graminis : high rainfall resulted in high incidences of the virus and P. graminis , and a weekly rainfall of 14 mm was sufficient for P. graminis to initiate infection. Temperatures prevailing during the rainy season ranged from 23 to 30 ° C and were found to be conducive to natural virus transmission. These results suggest measures to be explored for controlling peanut clump disease.

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Nitrogen fixation

Cited by 6 publications

References 53 publications

Evolving ideas of legume evolution and diversity: a taxonomic perspective on the occurrence of nodulation

Evolving ideas of legume evolution and diversity: a taxonomic perspective on the occurrence of nodulation

Development and characterization of BAC-end sequence derived SSRs, and their incorporation into a new higher density genetic map for cultivated peanut (Arachis hypogaea L.)

Dynamics of Polymyxa graminis and Indian peanut clump virus (IPCV) infection on various monocotyledonous crops and groundnut during the rainy season

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