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Program report 1998
A selective, rather than an all-encompassing, report of projects in the research and international programs is presented. Capsule summaries are provided for some of the Institute's ongoing projects. Projects not reported on in detail are listed at the end of each program section. The 1998 listings include point summaries of accomplishments that were gleaned from the April 1999 Report of the Director General. The report is limited to activities that have reached a reportable stage involving analysis, interpretation, and conclusions. A few significant interim results are reported because they may be useful to other rice workers. Abbreviations of six research divisions and one center are: AE--Agricultural Engineering
All research activities are reported under one of six research programs:
This year, names of IRRI research staff and collaborators are given for most projects or activities. Click here to see the affiliations of of collaborating researchers (desginated by footnotes in the text). Names without a footnote are those of IRRI staff. Click here for the listing of publications and seminars by IRRI staff in 1998. Other background on this report The report uses the International System of Units (SI). Monetary units are usually in U.S. dollars ($); if not, exchange rates are provided. Control or check normally means an untreated control and all results reported are based on scientifically accepted experimental design. Grain yield is calculated as rough rice, and protein content as a percentage of brown rice, at 14% moisture content. Yield refers to grain yield unless otherwise noted. Fertilizer amounts are given in terms of the elements (N,P, K, Zn, etc.), not in oxide formulation (P2O5, K2O, etc.). Pedigrees are indicated by a slant bar (/) rather than by a multiplication sign (x). For example, (PTB33 x IR30) x IR36 is written PTB 33/IR30//IR36. Fourth and further crosses are designated /4/, /5/, and so on. Backcrosses are designated by an asterisk (*) and a number that indicates the number of times the recurrent parent is crossed to the other parent. The asterisk and the number are placed adjacent to the crossing symbol that divides the current and donor parents. Unless otherwise noted, scoring of morphological characters and of damage attributed to rice pests and physiochemical stresses is based on scales in Standard evaluation system for rice (SES), 4th edition, 1996. Copies are available from the International Network for Genetic Evaluation of Rice, IRRI. In tables, a single asterisk (*) means a difference at the 5% level of significance, and a double asterisk (**) means a significant difference at the 1% level; ns means not significant. Unless otherwise stated, separation of means in table columns is by Duncan's multiple range test at the 5% level. This report normally uses generic names of chemicals. Use of a commercial brand name does not constitute endorsement.
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• Program Report 2000 • Program Report 1999 • Program Report 1998 • Program Report 1997 • Program Report 1996 (13.7 MB, 34 mins@56kbps) • Program Report 1995 (20.5 MB, 51 mins@56kbps) • Program Report 1994 (21.7 MB, 54 mins@56kbps) • Program Report 1993 (18.7 MB, 47 mins@56kbps) • Program Report 1992 (22.6 MB 56 mins@56kbps) • Program Report 1991 (21.8 MB, 54 mins@56kbps) • Program Report 1990 (22.2 MB, 55 mins@56kbps) • Program Report 1989 (23.1 MB, 57 mins@56kbps) If you do not have Acrobat Reader to access the pdf files, click the Icon below to download the free software.
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This Program Report for 1998 is a definitive record of achievement in
research by IRRI scientists, much of it in collaboration with others. It
is intended to account to donors and to make available to rice researchers
the most current information about the outcome of activities in the Institute's
