Exploring the genetic diversity of jackfruit (Artocarpus heterophyllus Lam.) grown in Uganda based on SSR markers

Nakintu, Justine; Albrecht, Christian; Müller, Christina M.; Kagoro‐Rugunda, Grace; Andama, Morgan; Olet, Eunice Apio; Lejju, Julius Bunny; Gemeinholzer, Birgit

doi:10.1007/s10722-019-00830-5

Cited by 12 publications

(10 citation statements)

References 33 publications

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“…Recently, a major improvement in understanding the molecular mechanisms and genes involved in controlling the ascorbic acid accumulation and fruit softening was brought about by the whole genome sequencing of Psidium guajava [ 231 ]. In the case of jackfruit, genetic diversity analysis has shown that white pulp and firm textured fruit varieties were more genetically diverse compared to red and yellow pulps and soft textured fruits, respectively [ 232 ]. A notable addition to the genetic information of jackfruit is its draft genome assembly.…”

Section: Genomic Assisted Breeding Strategies In Tropical Fruit Cropsmentioning

confidence: 99%

Genomic Approaches for Improvement of Tropical Fruits: Fruit Quality, Shelf Life and Nutrient Content

Mathiazhagan

Chidambara

Laxman

et al. 2021

Genes

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The breeding of tropical fruit trees for improving fruit traits is complicated, due to the long juvenile phase, generation cycle, parthenocarpy, polyploidy, polyembryony, heterozygosity and biotic and abiotic factors, as well as a lack of good genomic resources. Many molecular techniques have recently evolved to assist and hasten conventional breeding efforts. Molecular markers linked to fruit development and fruit quality traits such as fruit shape, size, texture, aroma, peel and pulp colour were identified in tropical fruit crops, facilitating Marker-assisted breeding (MAB). An increase in the availability of genome sequences of tropical fruits further aided in the discovery of SNP variants/Indels, QTLs and genes that can ascertain the genetic determinants of fruit characters. Through multi-omics approaches such as genomics, transcriptomics, metabolomics and proteomics, the identification and quantification of transcripts, including non-coding RNAs, involved in sugar metabolism, fruit development and ripening, shelf life, and the biotic and abiotic stress that impacts fruit quality were made possible. Utilizing genomic assisted breeding methods such as genome wide association (GWAS), genomic selection (GS) and genetic modifications using CRISPR/Cas9 and transgenics has paved the way to studying gene function and developing cultivars with desirable fruit traits by overcoming long breeding cycles. Such comprehensive multi-omics approaches related to fruit characters in tropical fruits and their applications in breeding strategies and crop improvement are reviewed, discussed and presented here.

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Section: Genomic Assisted Breeding Strategies In Tropical Fruit Cropsmentioning

confidence: 99%

Genomic Approaches for Improvement of Tropical Fruits: Fruit Quality, Shelf Life and Nutrient Content

Mathiazhagan

Chidambara

Laxman

et al. 2021

Genes

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“…Though there are some noticeable differences in the way jackfruit varieties are categorized in different countries, the use of fruit texture and pulp colour seem to be consistent worldwide. In addition, a study conducted on the Genetic diversity of jackfruit grown in Uganda revealed two genetic clusters and one of the clusters was closely related to samples from Asia ( (Nakintu et al, 2019) suggesting existence of similar varieties or shared ancestral origin.…”

Section: Ethno-varieties Of Jackfruitmentioning

confidence: 99%

“…In its geographical range (Asia, Africa and South America), it is mostly grown for its nutritious big fruits (Borines et al, 2014;Haq, 2006). Due to the big size of its fruits, in Uganda, jackfruit is known as Ffenensi or Ffene derived from a Luganda language phrase "Ffena ensi tulya kuno", literally meaning that the fruit can feed the whole world (Nakintu et al, 2019). In addition to its nutritious fruits, jackfruit tree is a source of fuel, timber, medicine and fodder (Borines et al, 2014;Haq, 2006).…”

Section: Introductionmentioning

confidence: 99%

“…For instance strong human selection has been reported to be responsible for creating genetic bottlenecks (Hyten et al, 2006) leading to reduction of crops' genetic diversity (Turyagyenda et al, 2012;Wang, 2011). Despite the existence of selection pressures against the crop, recent findings revealed that Uganda harbors high genetic diversity of jackfruit (Nakintu et al, 2019). However, the genetic information needs to be complemented by documentation of ethno-varieties of jackfruit and its distribution in the country.…”

Section: Introductionmentioning

confidence: 99%

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Ethno-varieties and Distribution of jackfruit tree (Artocarpus heterophyllus Lam.) in Uganda: implications for trade, food security and germplasm conservation

Nakintu

Olet

Andama

et al. 2019

EAJSTI

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Artocarpus heterophyllus Lam. is a fruit tree crop largely grown in tropical regions for its edible fruits. Though listed among underutilized crops, the demand for jackfruit in Uganda has increased. Amidst the increase in demand, the crop faces strong selective pressure and yet there is no documentation of the varieties and distribution of the crop in the country. This study therefore aimed at determining the varieties and distribution of jackfruit in Uganda using folk knowledge to provide a baseline for its production, booming market and conservation. A cross-sectional survey involving 349 participants comprising of 205 jackfruit traders and 144 jackfruit farmers from three political regions and three agro-ecological zones was conducted. Data were collected through face to face interviews using a semi-structured questionnaire and direct observations. Classification of jackfruit varieties, geographical location of the source of jackfruits for traders and the time of harvest of the fruit by the farmers were investigated. Occurrence of varieties per household was determined through on-farm visits. Data analysis techniques involved descriptive, chi-square and Cramer’s V measure of association analyses. Traders mainly obtained jackfruit from Central (46.0%) and Eastern (37.6%) political regions, Lake Victoria Crescent and Mbale Farmlands (41.1%) and Southern and Eastern Lake Kyoga Basin (30.0%) agro-ecological zones. Jackfruit varieties were classified basing on fruit texture and pulp colour, revealing four ethno-varieties, soft (Serebera), firm yellow (Kanaanansi), firm red (Namusaayi) and firm white (Namata). Namata and Serebera registered the lowest occurrences political regions and agro-ecological zones. Farmers harvested jackfruit throughout the year with a peak season in December and January. Folk knowledge provided baseline information for jackfruit variety categorization. Selection pressure exerted on Serebera and Namata demands for germplasm conservation. Since jackfruit thrives in a wide range of climatic conditions, its cultivation should be encouraged to ensure food security and sustain the increasing demand.

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“…ISSR markers have been used to assess genetic diversity in many plant species, including jackfruit (Hai et al, 2009), guava (Youssef and Ibrahim, 2016), date palm (Purayil et al, 2018), banana (Babu et al, 2018 and doum palm (Khalil et al, 2019). Moreover, other molecular markers have been used in the assessment of genetic variability in jackfruit, including AFLP (Schnella et al, 2001;Shyamalamma et al, 2008;Li et al, 2010), RAPD (Simon et al, 2007;Gopalsamy et al, 2012;Prasad et al, 2014;Krishnan et al, 2015) and SSR (Nakintu et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Morphological, Chemical and Molecular Variations Among Some Jackfruit Landraces

2020

AJAS

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Assessment of genetic diversity and relationship among six landraces of jackfruit (Artocarpus heterophyllus) grown in Aswan Botanical Garden (Aswan, Egypt) was preformed using morphological, chemical and molecular evaluations. A wide range of variability was observed among the tested landraces, reflected by highly significant differences in all evaluated traits. Among which, fruit length, seed weight, fruit peel weight, total phenolics, non-reducing sugars, protein, calcium, phosphorus and potassium content showed higher influence than others, the way that affected the relationship among landraces and their grouping in dendrogram. These traits are highly recommended to be included in successive evaluation studies of jackfruit. Cluster analysis based on the phenotypic data allowed the grouping of the landraces according to their shared features of higher or lower values of morphological and chemical traits, which could be helpful in the subsequent crop improvement efforts. On the other hand, molecular analysis using inter simple sequence repeats (ISSR) markers clearly confirmed the degree of variability among jackfruit landraces by showing a high percentage of polymorphism (up to 71.43%) and providing a good cluster relationship in the ISSRbased-dendrogram. Furthermore, combining phenotypic and molecular data to perform cluster analysis, gave an insight into the landraces' relationships. High similarity was observed between molecular-and combined-based dendrograms unlike phenotypic-based one. Results herein can benefit the breeding programs of jackfruit.

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Exploring the genetic diversity of jackfruit (Artocarpus heterophyllus Lam.) grown in Uganda based on SSR markers

Cited by 12 publications

References 33 publications

Genomic Approaches for Improvement of Tropical Fruits: Fruit Quality, Shelf Life and Nutrient Content

Genomic Approaches for Improvement of Tropical Fruits: Fruit Quality, Shelf Life and Nutrient Content

Ethno-varieties and Distribution of jackfruit tree (Artocarpus heterophyllus Lam.) in Uganda: implications for trade, food security and germplasm conservation

Morphological, Chemical and Molecular Variations Among Some Jackfruit Landraces

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