eprintid: 74
rev_number: 12
eprint_status: archive
userid: 1
dir: disk0/00/00/00/74
datestamp: 2011-06-09 08:10:17
lastmod: 2011-06-10 09:23:16
status_changed: 2011-06-09 08:10:17
type: article
metadata_visibility: show
item_issues_count: 0
creators_name: Khedikar, Y P
creators_name: Gowda, M V C
creators_name: Sarvamangala, C
creators_name: Patgar, K V
creators_name: Upadhyaya, H D
creators_name: Varshney, R K
icrisatcreators_name: Khedikar, Y P
icrisatcreators_name: Upadhyaya, H D
icrisatcreators_name: Varshney, R K
affiliation: University of Agricultural Sciences(Dharwad)
affiliation: ICRISAT(Patancheru)
affiliation: CIMMYT(Mexico)
country: India
country: Mexico
title: A QTL study on late leaf spot and rust revealed one major QTL for molecular breeding for rust resistance in groundnut Arachis hypogaea L.)
ispublished: pub
subjects: s1.3
full_text_status: public
agrotags: <b>Agrotags</b>     - rusts | genetics | groundnuts | environment | diseases | phenotypes | genotypes | spots | apples | breeds (animals) <br><b>Fishtags</b>    - fungal diseases <br><b>Geopoliticaltags</b> - india | usa | delhi | north carolina | maine | mexico | karnataka | asia
note: Authors are thankful to the National Fund of the
Basic and Strategic Research in Agriculture (NFBSRA) of the Indian
Council of Agriculture (ICAR-RKV, MVCG), Department of Biotechnology
(DBT) of the Government of India (MVCG, RKV) and the
Tropical Legume I of Generation Challenge Programme (RKV)
for Wnancial support to undertake this study. Thanks are also due to
Dr T. Nepolean of the Indian Agricultural Research Institute (IARI),
New Delhi, Dr P. L. Kulwal of Mahatma Phule Krishi Vidyapeeth
(MPKV), Rahuri and the two anonymous reviewers for their valuable
suggestions.
abstract: Late leaf spot (LLS) and rust are two major
foliar diseases of groundnut (Arachis hypogaea L.) that
often occur together leading to 50–70% yield loss in the
crop. A total of 268 recombinant inbred lines of a mapping
population TAG 24 £ GPBD 4 segregating for LLS and
rust were used to undertake quantitative trait locus (QTL)
analysis. Phenotyping of the population was carried out
under artiWcial disease epiphytotics. Positive correlations
between diVerent stages, high to very high heritability and
independent nature of inheritance between both the
diseases were observed. Parental genotypes were screened
with 1,089 simple sequence repeat (SSR) markers, of which
67 (6.15%) were found polymorphic. Segregation data
obtained for these markers facilitated development of partial
linkage map (14 linkage groups) with 56 SSR loci.
Composite interval mapping (CIM) undertaken on genotyping
and phenotyping data yielded 11 QTLs for LLS (explaining
1.70–6.50% phenotypic variation) in three environments
and 12 QTLs for rust (explaining 1.70–55.20% phenotypic
variation). Interestingly a major QTL associated with rust
(QTLrust01), contributing 6.90–55.20% variation, was identiWed
by both CIM and single marker analysis (SMA). A
candidate SSR marker (IPAHM 103) linked with this QTL
was validated using a wide range of resistant/susceptible
breeding lines as well as progeny lines of another mapping
population (TG 26 £ GPBD 4). Therefore, this marker
should be useful for introgressing the major QTL for rust in
desired lines/varieties of groundnut through markerassisted
backcrossing.
date: 2011
publication: TAG Theoretical and Applied Genetics
volume: 121
number: 5
publisher: Springer Verlag
pagerange: 971-984
refereed: TRUE
official_url: http://dx.doi.org/10.1007/s00122-010-1366-x
related_url_url: http://scholar.google.co.in/scholar?as_q=%22A+QTL+study+on+late+leaf+spot+and+rust+revealed+one+major+QTL+for+molecular+breeding+for+rust+resistance+in+groundnut+Arachis+hypogaea+L.%29%22&num=10&btnG=Search+Scholar&as_epq=&as_oq=&as_eq=&as_occt=title&as_s
related_url_type: author
funders: Indian Council of Agricultural Research
funders: Government of India - Department of Biotechnology
funders: Generation Challenge Programme
citation:   Khedikar, Y P and Gowda, M V C and Sarvamangala, C and Patgar, K V and Upadhyaya, H D and Varshney, R K  (2011) A QTL study on late leaf spot and rust revealed one major QTL for molecular breeding for rust resistance in groundnut Arachis hypogaea L.).  TAG Theoretical and Applied Genetics, 121 (5).  pp. 971-984.      
document_url: http://oar.icrisat.org/74/1/rkv20103.pdf