eprintid: 1524
rev_number: 10
eprint_status: archive
userid: 14
dir: disk0/00/00/15/24
datestamp: 2011-09-14 10:16:57
lastmod: 2011-09-14 10:16:57
status_changed: 2011-09-14 10:16:57
type: article
metadata_visibility: show
contact_email: Library-ICRISAT@cgiar.org
item_issues_count: 0
creators_name: Mgonja, M A
creators_name: Monyo, E S
creators_name: Chandra, S
creators_name: Murambadoro, D
creators_name: Chinhema, E
icrisatcreators_name: Mgonja, M A
icrisatcreators_name: Monyo, E S
icrisatcreators_name: Chandra, S
icrisatcreators_name: Murambadoro, D
icrisatcreators_name: Chinhema, E
affiliation: ICRISAT(Bulawayo)
affiliation: ICRISAT(Patancheru)
country: Zimbabwe
country: India
title: Stratification of SADC regional pearl millet testing sites based on grain yield performance of lines
ispublished: pub
subjects: S1.5
full_text_status: restricted
abstract: Sequential retrospective (SeqRet) pattern analysis was used to stratify pearl millet [Pennisetum glaucum] testing sites according to their similarity of line-yield differentiation using grain yield data from 90 multi-environment trials (METs) conducted in the Southern African Development Community (SADC) region. The METs, conducted across 25 sites over 9 years were split into two sets: Set 1 (1989/90-1992/93) included introductory genetic materials, and Set 2 (1994/95-1998/99) included advanced genetic materials. Site stratification analysis from Set 1 and Set 2 partitioned the testing sites into six and five groups with R2-values of 76 and 79%, respectively. Analysis of the cumulative dataset (1989/90-1998/99) clustered the 25 sites into six groups with R2=76% and captured the major patterns of site similarities in Set 1 and Set 2. Based on our experience from running multi-year METs in the SADC region, the cumulative dataset was more informative in judging the relevance of site-stratification results. SeqRet pattern analysis, exploiting available highly imbalanced historical MET data, provided an objective basis for stratifying the test-sites to facilitate selection of a few representative test-sites for future testing of lines. The results from cumulative dataset suggest that future line testing could be restricted to a few sites picked from within each of the identified site-groups.
date: 2002
publication: Field Crops Research
volume: 73
number: 2-3
publisher: Elsevier
pagerange: 143-151
refereed: TRUE
official_url: http://dx.doi.org/10.1016/S0378-4290(01)00191-5
related_url_url: http://scholar.google.co.in/scholar?as_q=%09Stratification+of+SADC+regional+pearl+millet+testing+sites+based+on+grain+yield+performance+of+lines&num=10&btnG=Search+Scholar&as_epq=&as_oq=&as_eq=&as_occt=title&as_sauthors=&as_publication=&as_ylo=&as_yhi=&as
related_url_type: author
funders: Governments of SADC countries
citation:   Mgonja, M A and Monyo, E S and Chandra, S and Murambadoro, D and Chinhema, E  (2002) Stratification of SADC regional pearl millet testing sites based on grain yield performance of lines.  Field Crops Research, 73 (2-3).  pp. 143-151.      
document_url: http://oar.icrisat.org/1524/1/FieldCcropRes73_2-3_143-151_2002.pdf