Seed purpose watermelon – an underutilized potential oilseed crop for livelihood security in Indian arid zone

Mahla, H. R.; Rathore, Sanjay Singh; Venkatesan, K.; Mathur, B.K.

doi:10.17660/actahortic.2019.1241.2

Cited by 2 publications

(4 citation statements)

References 3 publications

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“…Earlier, Mahla et al . (2014) reported free gene flow between these two species resulted in the development of several intermediate forms in India. We found 19 accessions from overall, 131 from Pop I and eight from Pop II belonging to the admixture group with partial ancestry from more than one genetic background which might have resulted from the complex evolutionary process involving intercrossing and gene flow between different taxa.…”

Section: Discussionmentioning

confidence: 99%

“…Since then, it is under cultivation in irrigated as well as conserved moisture conditions and mainly for seed purpose in the arid and semi-arid regions of Rajasthan. As a result of gene flow between C. lanatus and C. colocynthis, several well-adapted landraces with novel characters have evolved in India (Mahla et al ., 2014). During the 11 th Century, the crop was introduced into China (Zhao, 2015), where few local dessert varieties and an edible-seeded variety were developed and are still prevalent (Levi et al ., 2017).…”

Section: Introductionmentioning

confidence: 99%

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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)

Pal

Revadi

Thontadarya

et al. 2020

Plant Genet. Resour.

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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 well-adapted 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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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Pal

Revadi

Thontadarya

et al. 2020

Plant Genet. Resour.

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“…However, in many Asian and African countries, watermelons are instead cultivated for edible seeds. In China and India, most of the edible seed watermelons are from C. lanatus (Zhang, 1996; Mahla et al, 2014), whereas in West Africa, egusi watermelon, from the indigenous C . mucosospermus are extensively cultivated for edible seed (Oyolu, 1977; Gusmini et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

“…mucosospermus are extensively cultivated for edible seed (Oyolu, 1977; Gusmini et al, 2004). C. colocynthis is also cultivated as an edible seed watermelon in the Arabian peninsula and in India (Schafferman et al, 1998; Mahla et al, 2014). The land under edible seed watermelon production is increasing and the market has expanded from China, India and Africa to Europe and the Americas (Zhang, 1996; National Research Council, 2006; Mahla et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Chromosomal Locations and Interactions of Four Loci Associated With Seed Coat Color in Watermelon

2019

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Different species of edible seed watermelons ( Citrullus spp.) are cultivated in Asia and Africa for their colorful nutritious seeds. Consumer preference varies for watermelon seed coat color. Therefore, it is an important consideration for watermelon breeders. In 1940s, a genetic model of four genes, R , T , W and D , was proposed to elucidate the inheritance of seed coat color in watermelon. In this study, we developed three segregating F 2 populations: Sugar Baby (dotted black seed, RRTTWW ) × plant introduction (PI) 482379 (green seed, rrTTWW ), Charleston Gray (dotted black seed, RRTTWW ) × PI 189225 (red seed, rrttWW ), and Charleston Gray (dotted black seed, RRTTWWdd ) × UGA147 (clump seed, RRTTwwDD ) to re-examine the four-gene model and to map the four genes. In the dotted black × green population, the dotted black seed coat color ( R_ ) is dominant to green seed coat color ( rr ). In the dotted black × red population, the dominant dotted black seed coat color and the recessive red seed coat color segregate for the R and T genes, where the R gene is dominantly epistatic to the T gene. However, the inheritance of the T locus did not fit the four-gene model, thus we named it T 1 . In the dotted black × clump population, the clump seed coat color and the dotted black seed coat color segregate for W and D , where D is recessively epistatic to W . The R , T 1 , W , and D loci were mapped on chromosomes 3, 5, 6, and 8, respectively, using QTL-seq and genotyping-by-sequencing (GBS). Kompetitive Allele Specific PCR (KASP™) assays and SNP markers linked to the four loci were developed to facilitate maker-assisted selection (MAS) for watermelon seed coat color.

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Seed purpose watermelon – an underutilized potential oilseed crop for livelihood security in Indian arid zone

Cited by 2 publications

References 3 publications

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

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

Chromosomal Locations and Interactions of Four Loci Associated With Seed Coat Color in Watermelon

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