เสถียรภาพผลผลิตของข้าวเหนียวต้านทานโรคไหม้

Abstract

Genotype and environment usually interact in growing rice in different circumstance and cause in difficulty and unprecision for rice lines selection. Therefore, an analysis of yield stability was being conducted to help the breeder for more decision making in rice lines selection. The objective of this study is to determine well adapted rice lines with yield stability. An experiment was conducted with randomized complete block design with 4 replications. Six non-photosensitive glutinous rice lines which resistant to rice blast disease were compared with 2 check varieties, SPT1 and RD10 at Chum Phae, Khon Kaen, Sakon Nakorn, Udon Thani, and Surin Rice Research Center during 2005-2008 as total 17 environments. 25-30 days seedling of tested rice lines were transplanted with 20*20 cm spacing. Fertilizer was applied as basal at the rate of 6-6-6 kg N-P2O5-K2O/rai and 6-0-0 kg N-P2O5-K2O/rai as topdressing. Grain yield was then harvested in 4.6 square m area. Analysis of total variation showed that grain yield, harvesting age, plant height and panicle per hill of each tested line was significantly different. Interaction between genotype and environment.