Analysis of the genetic diversity of super sweet corn inbred lines using SSR and SSAP markers

Wr, Ko; Kj, Sa; Roy, Neha Samir; Choi, Hong‐Seok; Jk, Lee

doi:10.4238/gmr.15017392

Cited by 8 publications

(6 citation statements)

References 34 publications

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“…The gene diversity computed for the 268 sweet corn inbreds is likely to be overestimated, as stated before, due to unusual high residual heterozygosity at some loci, and thus, conclusion regarding genetic diversity in the sweet corns of public sectors in Thailand must be interpreted with caution. However, the gene diversity found in our sweet corns (0.71) was comparable to that found in 12 inbreds (0.64) reported by Ferreira et al (2018) and in 87 inbreds reported by Ko et al (2016).…”

Section: Genetic Diversity In the Sweet Corn Inbredssupporting

confidence: 83%

“…A total of 224 alleles were detected with the number of alleles per locus (N A ) ranging from 5 (markers umc1123, umc1394 and umc1276) to 20 (marker bnlg1033) with an average of 11.2 (Table 1). The average number of alleles per locus in our sweet corns was much higher than that in sweet corn germplasms previously reported by Ko et al (2016) (1.96 alleles per locus from 50 SSRs in 87 diverse sweet corn inbreds conserved in a public institute of Korea), by Mehta et al (2017) ). Nonetheless, the high number of alleles and alleles per locus in our study indicates wide genetic variation among the sweet corn inbred lines in the public sectors in Thailand.…”

Section: Ssr Variationcontrasting

confidence: 63%

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Genetic diversity of sweet corn inbred lines of public sectors in Thailand revealed by SSR markers

Laosatit

Amkul

Somta

et al. 2022

Crop Breed. Appl. Biotechnol.

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The Thailand governmental institutes play important roles in genetic improvement of sweet corn in Thailand. We assessed the genetic diversity of 268 sweet corn inbreds from three major institutes (NCSRC-KU, CNFCRC, and KKU) and three commercial hybrids using 20 SSR markers. The markers detected 224 alleles in total, with an average of 11.2 alleles per locus. Overall gene diversity was relatively high, being 0.7. Allelic richness, gene diversity, and heterozygosity in the inbreds among the three institutes were comparable. However, the inbreds from KKU possessed the greatest number of unique alleles and rare alleles, albeit they showed the highest percentage of genetic impurity. Neighbor-joining, principal coordinate, and STRUCTURE analyses showed that the inbreds were genetically different. Our findings provide insight into the breeding gene pool and population structures of the sweet corn germplasm of the public sector in Thailand, enhancing efficiency of sweet corn germplasm utilization for developing new varieties.

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Section: Genetic Diversity In the Sweet Corn Inbredssupporting

confidence: 83%

Section: Ssr Variationcontrasting

confidence: 63%

Genetic diversity of sweet corn inbred lines of public sectors in Thailand revealed by SSR markers

Laosatit

Amkul

Somta

et al. 2022

Crop Breed. Appl. Biotechnol.

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“…They identified inbreds for synthesis of pools and populations to develop novel inbreds and prospective heterotic combinations in various genetic backgrounds (sh2sh2 x sh2sh2, su1su1 x su1su1, su1su1/sh2sh2 x su1su1/sh2sh2, sh2sh2 x su1su1/sh2sh2 and su1su1 x su1su1/sh2sh2). For maize-breeding programs in Korea, Ko et al [13] compared the efficiency of simple sequence repeat (SSR) and sequence specific amplified polymorphism (SSAP) markers for analyzing genetic diversity, genetic relationships, and population structure of 87 supersweet corn inbred lines from different origins. Even though supersweet corn has a narrow genetic origin and is not widely used in Korea; they found enough variability for breeding supersweet for Korea.…”

Section: Genetic Basis Of Modern Sweet Cornmentioning

confidence: 99%

Sweet Corn Research around the World 2015–2020

2021

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Modern sweet corn is distinguished from other vegetable corns by the presence of one or more recessive alleles within the maize endosperm starch synthesis pathway. This results in reduced starch content and increased sugar concentration when consumed fresh. Fresh sweet corn originated in the USA and has since been introduced in countries around the World with increasing popularity as a favored vegetable choice. Several reviews have been published recently on endosperm genetics, breeding, and physiology that focus on the basic biology and uses in the US. However, new questions concerning sustainability, environmental care, and climate change, along with the introduction of sweet corn in other countries have produced a variety of new uses and research activities. This review is a summary of the sweet corn research published during the five years preceding 2021.

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“…QTL/modifier genes in the starch biosynthesis pathway may influence kernel sweetness (Qi et al 2009, Whitt et al 2002 in the sh2sh2/su1su1 genetic background. Wide genetic In view of the growing importance of sweet corn and to accelerate the pace of progress of sweet corn cultivar development, it is therefore, important to develop promising sweet corn hybrids with high kernel sweetness and per se productivity (Ko et al 2016, Mehta et al 2017. Only few centres in selected countries possess organized sweet corn breeding programmes, and hybrids are predominantly in the genetic background of either sh2sh2 or su1su1.…”

Section: Resultsmentioning

confidence: 99%

Analysis of responses of novel double mutant (sh2sh2/su1su1) sweet corn hybrids for kernel sweetness under different sowing- and harvest-time

Mehta¹,

Hossain²,

Muthusamy³

et al. 2017

Indian J Agri Sci

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Sweet corn used as vegetable and component of various snack items, has emerged as one of the popular choices across the world. Identification of suitable sowing- and harvest-time for achieving high-kernel sweetness and yield is of paramount importance for successful commercialization of sweet corn hybrids. In the present study, 11 novel double mutant sweet corn (sh2sh2/su1su1) hybrids along with traditional sh2sh2-based checks were evaluated at three sowing- and harvest-dates. Kernel brix across double mutant sweet corn hybrids ranged from 17.6-26.6% (Mean:21.0%) and was comparatively higher than sh2sh2-based checks (19.3%). Sowing- and harvest- time had significant influence on brix accounting 19.4% and 8.5% of the total variation, respectively. Genotype Ã— sowing time, genotypeÃ— harvest time and genotype Ã— sowing time Ã— harvest time interactions contributed 11.4%, 10.3% and 15.2% of the total variation for brix, respectively. Average brix across harvest dates attained highest value in third sowing and 24-days after pollination recorded the highest brix across sowing dates. Few hybrids also displayed stable brix across sowing- and harvest- time. Significant influence of sowing time on both cob- and fodder- yield was also observed, and third sowing was identified as the most favourable environment for both the traits. Kernel sweetness did not show any correlation with cob- and fodder- yield. The information generated here hold significant promise in the improvement of sweet corn. This is the first ever report of responses of sh2sh2/su1su1-based hybrids to different sowing- and harvest- time for kernel sweetness and yield.

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Analysis of the genetic diversity of super sweet corn inbred lines using SSR and SSAP markers

Cited by 8 publications

References 34 publications

Genetic diversity of sweet corn inbred lines of public sectors in Thailand revealed by SSR markers

Genetic diversity of sweet corn inbred lines of public sectors in Thailand revealed by SSR markers

Sweet Corn Research around the World 2015–2020

Analysis of responses of novel double mutant (sh2sh2/su1su1) sweet corn hybrids for kernel sweetness under different sowing- and harvest-time

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