Stability of selected rice genotypes under high temperature condition in Cagayan
Issue Date
7-2018
Abstract
Cagayan [Philippines] is one of the highest rice producers and also one of the hottest areas in the Philippines. Existing rice varieties have no known tolerance to heat stress, but still being planted by farmers in Cagayan due to their good performance. To determine the stability and adaptability under high temperature condition, these varieties together with two new heat-tolerant elite lines were planted in four municipalities of Cagayan. Based on AMMI analysis, variance due to genotype, environment and GEI were significant (P0.05). Environment contributed the greatest proportion which was 43.1% of the total variance, while genotype contributed 35.5%, and GEI 21.5%. Results also showed that the highest yielding genotype across environment was PR40330-42-7-12-1. Highest genotype for each location varied. In Iguig, the highest was PR40330-42-7-12-1, in Peñablanca and Solana, NSIC Rc218, and in Tuguegarao, NSIC Rc240. The highest yielding environment was Peñablanca. In terms of stability, NSIC Rc152 was the most stable followed by PR42026-34-1-33.2. Yield stability index was also computed and revealed NSIC Rc152 as the most desirable genotype followed by PR40330-42-7-12-1. Panicle and canopy temperature varied significantly across genotypes which range from 4.9-10.8 deg C. The significant differences between genotypes could be attributed to ability of genotypes to transpire and cool the canopy in response to high air temperature. This could be their way to adapt to high temperature condition.
Source or Periodical Title
Philippine Journal of Crop Science
ISSN
0115-463X
Volume
43
Issue
Supplement no. 1
Page
107
Document Type
Article
College
College of Agriculture and Food Science (CAFS)
Language
English
Subject
Oryza sativa L.;
Recommended Citation
Madrid, L. B.; Manigbas, N. L.; and Tapic, R. T., "Stability of selected rice genotypes under high temperature condition in Cagayan" (2018). Journal Article. 4325.
https://www.ukdr.uplb.edu.ph/journal-articles/4325
En – AGROVOC descriptors
ORYZA SATIVA; GENOTYPES; ADAPTABILITY; TEMPERATURE; HEAT TOLERANCE; PHILIPPINES