Program report 1997

This Program Report for 1997 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. The 1997 Report is the last one reporting on the outcome of activities that took place during the Institute's Medium-term Plan for 1994-97. 

A selective, rather than an all-encompassing, report of projects in the research and international programs is presented. Capsule summaries are provided for about half of the Institute's ongoing projects. This partial detailed reporting will continue in subsequent program reports as the Institute begins its new Medium-term Plan for 1998-2003. Projects not reported on in detail are listed at the end of each program section. The 1997 listings include point summaries of accomplishments that were gleaned from the April 1998 Report of the Director General.

All research activities are reported under one of five research programs: 

• Irrigated Rice Ecosystem, (pdf report)
• Rainfed Lowland Rice Ecosystem (pdf report)
• Upland Rice Ecosystem (pdf report)
• Flood-prone Rice Ecosystem (pdf report)
• Cross-ecosystems Research. (pdf report)

• Germplasm Conservation, Dissemination, and Evaluation (pdf report)
• Information and Knowledge Exchange (pdf report)
• Training (pdf report)
• Strengthening International Partnerships (pdf report)

Abbreviations of the research divisions are: 

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 PTB33/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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