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Phenotypic diversity and identification of wild Arachis accessions with useful agronomic and nutritional traits

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Relation http://oar.icrisat.org/650/
http://dx.doi.org/10.1007/s10681-011-0518-7
 
Title Phenotypic diversity and identification of wild Arachis
accessions with useful agronomic and nutritional traits
 
Creator Upadhyaya, H D
Dwivedi, S L
Nadaf, H L
Singh, Sube
 
Subject Groundnut
 
Description Wild relatives harbor novel sources of
variation, which can be used to enhance the genetic
base of a cultivar gene pool. A total of 269 accessions
from 20 wild Arachis species belonging to six
sections were evaluated for 41 morpho-agronomic
traits and 89 selected accessions for oil, protein and
total sugar content. Six plants from each accession
were grown in an open Arachis house in largecylindrical
concrete structures during the 2004–2005
season at Patancheru, India. REML analysis showed
significant differences between species and accessions
for most of the traits studied. Hierarchical
cluster analysis, based on the first five principal
component scores accounted for 82.5% variation,
resulting in four clusters. Variation in genome
relationships and ploidy levels had no bearing on
the clustering pattern which was predominated by life
forms: clusters 1 and 2, contained mostly annuals and
clusters 3 and 4 perennials. A large range of
variations were noticed among species for some of
the agronomic traits: days to flowering, pod and seed
characteristics, specific leaf area (SLA) and for
SPAD chlorophyll meter reading (SCMR). Arachis
duranensis showed the maximum intraspecific variation
as revealed by a high diversity index for 23 of the
41 traits which included: days to flowering, primary
branches, plant width, pod length, pod width, SCMR
and SLA. The other species with desirable traits were
A. pusilla (earliest flowering) and A. villosa (high
SCMR at 60 and 80 days after sowing). The latter
species is cross compatible with cultivated groundnut,
thus, is a good source to enhance the trait value in the
cultigen’s gene pool. The best 20 accessions with
superior agronomic, nutritional quality and drought
related trait combinations have been identified for
their use in introgression of diverse and unique alleles
from wild Arachis species into A. hypogaea.
 
Publisher Springer
 
Date 2011
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Rights —
 
Identifier http://oar.icrisat.org/650/1/Euphytica_182_1_103%E2%80%93115_2011.pdf
Upadhyaya, H D and Dwivedi, S L and Nadaf, H L and Singh, Sube (2011) Phenotypic diversity and identification of wild Arachis accessions with useful agronomic and nutritional traits. Euphytica, 82 (1). pp. 103-115. ISSN 0014-2336