eprintid: 5065
rev_number: 10
eprint_status: archive
userid: 14
dir: disk0/00/00/50/65
datestamp: 2011-12-28 10:59:43
lastmod: 2018-03-14 07:20:09
status_changed: 2011-12-28 10:59:43
type: article
metadata_visibility: show
contact_email: Library-ICRISAT@cgiar.org
creators_name: Ntare, B R
creators_name: Williams, J H
creators_name: Fatondji, D
icrisatcreators_name: Ntare, B R
icrisatcreators_name: Fatondji, D
affiliation: ICRISAT(Bamako)
affiliation: Georgia Experiment Station(Griffin)
affiliation: ICRISAT(Niamey)
country: Mali
country: USA
country: Niger
title: Evaluation of groundnut genotypes for heat tolerance under field conditions in a Sahelian environment using a simple physiological model for yield
ispublished: pub
subjects: s1.3
full_text_status: restricted
abstract: Heat tolerance of groundnut (Arachis hypogaea L.) was evaluated under field conditions using physiological traits identified in a yield model [crop growth rate (C), reproductive duration (Dr) and partitioning (p)]. In 1991, 625 diverse genotypes were initially screened under irrigation during the hottest months (February to May). Subsequent tests consisted of 16 contrasting genotypes selected based on a combination of high pod yield and partitioning coefficient of >0· 50. Large variation was observed among the 625 genotypes for pod yield and physiological traits. C was a powerful factor influencing pod yield. Eight genotypes combining high pod yield and a partitioning coefficient greater than 0·6 were identified. These included two released cultivars (55–437 and 796) in the Sahel. Correlations between seasons were significant for p (r=0·84), but non-significant for pod yield (r=0·40), C (r=0·39), and Dr (0·36). Date of sowing and genotypes had significant effects on pod yield and C, but were slight on p and Dr. Pod yield of most genotypes declined by more than 50% when flowering and pod formation occurred when maximum temperatures averaged 40°C. The results revealed that estimates of p would be a more reliable selection criterion for identification of genotypes tolerant to heat than yield. Further research is suggested to maximize crop growth rate and partitioning of genotypes growing under supra-optimal temperatures.


date: 2001
date_type: published
publication: Journal of Agricultural Science
volume: 136
number: 1
publisher: Cambridge University Press
pagerange: 81-88
refereed: TRUE
issn: 0021-8596
official_url: http://dx.doi.org/10.1017/S0021859600008583
related_url_url: http://scholar.google.co.in/scholar?as_q=Evaluation+of+groundnut+genotypes+for+heat+tolerance+under+field+conditions+in+a+Sahelian+environment+using+a+simple+physiological+model+for+yield+&num=10&btnG=Search+Scholar&as_epq=&as_oq=&as_eq=&as_occt=title&as_
related_url_type: author
citation:   Ntare, B R and Williams, J H and Fatondji, D  (2001) Evaluation of groundnut genotypes for heat tolerance under field conditions in a Sahelian environment using a simple physiological model for yield.  Journal of Agricultural Science, 136 (1).  pp. 81-88.  ISSN 0021-8596     
document_url: http://oar.icrisat.org/5065/1/JAgriclSci136%281%2981-88.pdf