Genotype x environment interaction and growth stability of exotic tree willow (Salix spp.) clones
190 / 62
Authors
-
N.B. Singh
Department of Tree Improvement and Genetic Resources, College of Forestry, Dr. Y. S. Parmar University of Horticulture and Forestry, Nauni, Solan 173 230
-
J.P. Sharma
Department of Tree Improvement and Genetic Resources, College of Forestry, Dr. Y. S. Parmar University of Horticulture and Forestry, Nauni, Solan 173 230
-
Punit Choudhary
Department of Tree Improvement and Genetic Resources, College of Forestry, Dr. Y. S. Parmar University of Horticulture and Forestry, Nauni, Solan 173 230
-
R.K. Gupta
Department of Basic Science, Dr. Y. S. Parmar University of Horticulture and Forestry, Nauni, Solan 173 230
Abstract
Eighteen selected clones of Salix were taken to study genotype x environment interaction. Significant differences were observed for genotype, environments and genotype x environment interaction except non-significant genotype x environment interaction for plant height increments. Stability analysis revealed that the most of the genotypes were responsive to environmental changes. TheSalix clones
exhibited maximum growth in 2007 and 2010 growth years. Based on phenotypic indices (Pi), regression coefficient (bi) and deviation from regression (S2di) the clones J-799, SI-63-007 and NZ-1002 for volume index and SI-63-007 for diameter at breast height were found most adaptive to overall environments. Suitable clones for poor environment
was J-194, while for average environments were V-99, NZ-1040 and NZ-1179, respectively for diameter at breast height. Clones suitable for rich environment are PN7-31 for diameter at breast height and NZ-1140 and 131/25 for volume index. The clones identified for different agro ecological regions must be chosen by considering stability of the clones towards that environment.