Effect of genotypic x environmental (G x E) and genetic variability on rice yield and grain quality characters [electronic resource].
تأثير التفاعل بين التركيب الوراثى والبيئة والاختلافات الوراثية على صفات المحصول ومكوناته وصفات الجودة فى الأرز.
- p.967-982.
Includes reference.
Fifteen rice varieties and five promising lines were grown at Sakha and Gemmeiza Farm Stations during 2006 and 2001, seasons. The effect of genotype x environment (GC E) interactions and genotypic (GCV) and phenotypic (PCV) coeffICients of variability, broad sense heritability, genetic advance and phenotypic correlation coefficients were estimated for days to 50% heading. plant height, panicle length, no. of panicles/ plant. no, ,of filled grains/panicle, sterility%. 100.grain weight. grain yield/plant, grain shape, hulling%, milling%, head rice%, grain elongation. gelatinization temperature (GT.), gel consistency (GC) and amylose content. The results indicated that the interaction of genotypes x location was highly significant for plant height, panicle length, no. of panicles/ plant. no. of filled grains/panicle, grain yield/plant, and significant for head rice% and gelatinization temperature. The interaction of variety x location x year was highly significant for all studied characters except gel consistency and amylose content characters. Genotypic and phenotypic coefficient of variation (GCV,PCV) were found to be high for no. of filled grains/panicle. days to 50% heading, amylose content,grain elongation and head rice. Broad- sense heritability estimates ranged from moderate to high for all studied characters. High expected genetic a9vance was associated with high heritability. High heritability values coupled in plant height. no. of filled grains/panicle, gel consistency, milling %, hilling'% and head rice%. These results indicated _that individual plant selection for these characters should be effective and satisfactory for successful breeding purpose. The genotypes, GZ 6951-9-7-1-3, Sakha.101, GZ 8372-13-1-3-1. Sakha 104, Giza 176, GZ 8494-2-1-3-1, Sakha 102. Giza 118. GZ 8455-6-8- 1 and Sakha 103 gave the highest mean values for the 9ieid and its component characters under Gemmeiza Farm Station. Highly significant and positive phenotypic correlation was found between grain yield/plant and each of panicle. length, no. of panicle/plant. no. of filled grains/panicle, 100-grain weight, hilling %. milling % and head rice at both locations.