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Understanding genetic diversity, population structure and development of a core collection of Indian accessions of watermelon (Citrullus lanatus (Thunb.) Matsum. and Nakai).

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Title Understanding genetic diversity, population structure and development of a core collection of Indian accessions of watermelon (Citrullus lanatus (Thunb.) Matsum. and Nakai).
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Creator Not Available
Pal, S., Revadi, M., Thontadarya, R., Reddy, D., Varalakshmi, B., Pandey, C. and Eguru Sreenivasa Rao
 
Subject Genetic diversity, Indian core set, Population structure, Watermelon
 
Description Not Available
Most of the modern-day improved watermelon varieties succumb to various biotic and abiotic stresses
mainly because of their narrow genetic base. Insights into the genetic diversity and population
structure are crucial for broadening the genetic base and improving the adaptive value. The present
experiment was conducted to study the genetic diversity and population structure of a germplasm
panel comprising 336 Citrullus sp. accessions. Another objective was to formulate a core collection
of Indian Citrullus sp. accessions. Data from 23 highly polymorphic microsatellite markers were
used for genetic diversity and population structure analysis while both molecular and phenotypic
data from 17 traits were used to formulate the core set. The markers yielded a total of 69 alleles with
an average of three alleles per locus. Initially, the accessions clustered into two populations and an
admixture group. Intra-population analysis revealed three and two statistically distinct subpopulations
in Pop I and Pop II, respectively. The exotic collections were predominant in Pop I-A, Pop II-A
and Pop II-B while the Indian accessions were preponderant in Pop I-B and Pop I-C. Pop I-B recorded
the maximum magnitude of gene diversity and the highest number of alleles. The welladapted
Indian landraces could be deployed in future watermelon improvement programmes.
The formulated core collection (n = 46; 23.71% of the entire collection studied) would ease in maintenance
of the diversity present among indigenous Citrullus sp. accessions; would ease trait search
while exploring Indian diversity and can be pooled with other collection(s) to form a global core of
watermelon.
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Date 2021-07-23T09:05:28Z
2021-07-23T09:05:28Z
1001-01-01
 
Type Research Paper
 
Identifier 1. Pal, S., Revadi, M., Thontadarya, R., Reddy, D., Varalakshmi, B., Pandey, C. and Eguru Sreenivasa Rao (2020). Understanding genetic diversity, population structure and development of a core collection of Indian accessions of watermelon (Citrullus lanatus (Thunb.) Matsum. and Nakai). Plant Genetic Resources: Characterization and Utilization, 1-10. doi:10.1017/S1479262120000386
1479-2621
http://krishi.icar.gov.in/jspui/handle/123456789/49520
 
Language English
 
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Publisher Not Available