Genetic variation for VA mycorrhiza-dependent phosphate mobilisation in groundnut (Arachis hypogaea L.)

Nine cultivars of groundnut (Arachis hypogaea L.) were grown in a soil poor in available N or P. There was clearly genetic variation of characteristics indicative of VA mycorrhiza-dependent phosphate mobilisation, namely, VA mycorrhiza fungal spore count (SC), percentage of infection (IF) by VA myco...

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Bibliographic Details
Published in:Plant and soil 1990-02, Vol.122 (1), p.137-142
Main Authors: Kesava Rao, P.S. (Indian Agricultural Research Inst., New Delhi (India). Div. of Genetics), Tilak, K.V.B.R, Arunachalam, V
Format: Article
Language:English
Subjects:
Acid soils
ARACHIS HYPOGAEA
FOSFATOS
Fungal spores
GENETIC VARIATION
Groundnuts
Infections
MICORRIZAS ARBUSCULARES VESICULARES
MYCORHIZE A VESICULE ET ARBUSCULE
nutrient uptake
Phenotypic traits
Phosphatases
PHOSPHATE
PHOSPHATES
Plants
Rhizobium
VARIACION GENETICA
VARIATION GENETIQUE
VESICULAR ARBUSCULAR MYCORRHIZAE
vesicular-arbuscular mycorrhizas
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Summary:Nine cultivars of groundnut (Arachis hypogaea L.) were grown in a soil poor in available N or P. There was clearly genetic variation of characteristics indicative of VA mycorrhiza-dependent phosphate mobilisation, namely, VA mycorrhiza fungal spore count (SC), percentage of infection (IF) by VA mycorrhizal fungi (VAMF) and acid and alkaline phosphatase activities. Among the cultivars, one was non-nodulating with low values for all characteristics and in another experiment, this non-nodulating cultivar, one of its parents (PI 259747), a national check (Robut 33-1) and the highest yielding cultivar among the original nine (NFG 7), were grown and investigated for various P-mobilising properties and yield. The linear regressio coefficient of pod yield on % VAMF infection was significant in both the experiments. Additionally, many of the correlation coefficients of pod yield and VAM dependent characteristics were positive and significant. From consideration of published evidence, it seems possible to breed for the desirable reinforcing effects of infestation, by VAMF and Rhizobium that can ultimately improve the productivity of groundnuts.
ISSN:0032-079X
1573-5036
DOI:10.1007/BF02851921