Indian Society of Genetics & Plant Breeding

Study on dispersion of genetic variation among Indian garlic ecotypes using agro morphological traits

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Garlic (Allium sativum L.) a clonally propagated bulbous

crop, is of high medicinal value owing to its sulphurcontaining

compounds. Although asexually propagated,

garlic depicts wide genetic diversity in agro-morphological

traits and biochemical composition. A study was conducted

to dissect the extent of genetic divergence among 625 Indian

garlic genotypes considering 21 agro-morphological traits.

Pooled analysis exhibited significant variation among

accessions for various morphological traits. Ward’s

clustering method clustered germplasm collection into three

distinct groups. Clustering pattern did not correspond with

geographical origin of accessions. Strong and positive

correlation of marketable yield with plant weightwith leaves

(r = 0.83), plant weight without leaves (r = 0.84), average

bulb weight (r = 0.50), plant height (r = 0.58), pseudostem

length (r = 0.59), number of leaves (r = 0.54) and weight of

fifty cloves (r = 0.49) was recorded. These traits will be

useful for direct selection in crops like garlic. Principal

Component analysis minimised 21 components up to 12

vectors which measured nearly 90% variation. Conservation

of such vital and diverse garlic genotype is prerequisite to

assure successful selection breeding programme.

Keywords: Genetic diversity, Principal Component Analysis, correlation, cluster analysis, Allium sativum L.


Year: 2020
Volume: 80
Issue: 1
Article DOI: 10.31742/IJGPB.80.1.12
Print ISSN: 0019-5200
Online ISSN: 0975-6906



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