Upland and lowland rice cultivar agronomic traits, cooking and processing characteristics

Abstract

Upland and lowland rice cultivars and selected progenies have been evaluated as to their yielding stability and potential, several agronomic traits as well as to cooking and processing characteristics in agronomic years 1982/83 and 1983/84. Among the upland rice materials under testing, the cultivar IAC-165 and the progenies IAC-233 and IAC-150 have shown reasonable yielding potentials. The latter has also revealed good proportional increases in volume and weight, low gelatinization, high values for peak hot-paste viscosity and an excellent “set back”. Those features make IAC-150 quite adequate for processing purposes, e.g., parboiled or canned rice. The lowland cultivar IAC-4440 has significantly outyielded the other lowland rice materials in grain production, showing a marked yielding stability and leaf blast resistance. It has also attained high levels for peak hot-paste and cold viscosities, which make it proper for in natura consumption. Other upland and lowland rice materials have also presented good levels for certain cooking and processing characteristics and can be used in future breeding programs as gene sources for those specific attributes.