Genetic divergence studies in coriander (Coriandrum sativum L.)
Loading...
Date
2017
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
CCSHAU
Abstract
The present investigation entitled “Genetic divergence studies in coriander (Coriandrum sativum
L.)” was conducted at Research Farm of the Department of Vegetable Science, Chaudhary Charan Singh
Haryana Agricultural University, Hisar, during winter season of 2014-15 and the laboratory study was
carried out in the Department of Molecular Biology, Biotechnology and Bioinformatics during 2015-16.
113 coriander genotypes collected from different regions were sown in field following randomized block
design with three replications. To study DUS characters, the genotypes were observed visually and
categorized into different classes based on different morphological traits with the help of crop descriptors.
It is concluded that the morphological traits like leaf luster of longest basal leaf, leaf margin of longest
basal leaf, leaf colour of longest basal leaf, stem pigmentation, corolla colour, nodal pigmentation,
growth habit, seed colour, seed shape, seed size and seed ridge proved best for identification purpose, and
from this, it is also evident that there was a sufficient diversity for these traits in genotypes under study.
Variability studies reveal that there was a wide range of genetic diversity for yield and its attributing traits
in 113 coriander genotypes, which were evaluated under field conditions. The genotypic as well as
phenotypic correlations showed that the seed yield per plant had significant and positive association with
number of seeds per umbel, umbelletes per umbel, umbels per plant and secondary branches. Path analysis
revealed that high positive direct effects were exerted by traits like number of seeds per umbel, umbel per
plant, length of longest basal leaves and test weight on seed yield per plant, these are importance in crop
improvement, as they directly contribute towards seed yield per plant and in divergence study genotypes of
cluster III and VI showed highest mean values for seed yield per plant. Hybridization between these
clusters and other with highest mean for yield contributing traits can give promising results. However, for
more precise and accurate identification, the modern biotechnological tool like molecular markers could be
utilized. RAPD and ISSR were employed to assess the genetic diversity in best performing 48 coriander
genotypes, which were selected among 113 genotypes evaluated, which gave the clear picture of diversity
existence in genotypes at genetic level as DNA markers are not influenced by environmental effects or
plant growth stages, and both RAPD and ISSR markers proved best for assessing genetic diversity.
Description
Keywords
null