Genetic diversity is the foundation of the genetic improvement of crops. Jan 23, 2016 genetic diversity analysis based on genomewide singlenucleotide polymorphism snp assay of a set of indian rice cultivars including modern highyielding varieties and landraces revealed two broad groups, one with aus and the other with indica cultivars. Assessment of the genetic diversity of rice germplasms. Snpbased analysis of genetic diversity reveals important. This research was carried out to study the genetic diversity among the 50 aromatic rice accessions from three regions peninsular malaysia, sabah, and. Assessing the genetic diversity for miniaturization of crop collections to form mini core collection will lead to greater utilization of germplasm to. Many pigmented rice landraces are still grown by ethnic communities for their nutritional and cultural value. Agriculture relies heavily on the genetic diversity of crop plants.
North s 20 estimation of genetic variability and correlation for grain yield components in rice oryza sativa l. Bare coulibaly 2, maji alhassan 1,3, karim traore 1, francis nwilene 4, ibnou dieng 5, rodomiro ortiz 6, and baboucarr manneh 1. To evaluate the genetic diversity and differentiation of major groups of chinese cultivars, we calculated several population genetic parameters for both global and chinese samples. Phyto83n12 1427 american phytopathological society. The result of genetic diversity analysis on 299 varieties of indica inbred rice with. Assessing the genetic diversity of rice originating from. The rice diversity project, funded by nsf, is a collaborative effort, led by susan mccouch at cornell university, to explore the genetic basis of variation in rice and its wild ancestors. To accelerate the development of hybrid rice in the tropics, detailed analysis of genetic diversity and the relationships among parental lines should be well. Genetic diversity analysis of rice germplasm in tripura. Pandey p, anurag pj, tiwari dk, yadav sk, kumar b 2009 genetic variability, diversity and association of quantitative traits with grain yield in rice oryza sativa l. Some of these tools have been developed by the rice diversity project. A set of 192 diverse rice germplasm lines were genotyped using 61 genome wide ssr markers to assess the molecular genetic diversity and genetic relatedness. Dna polymorphisms amplified by arbitrary primers diversity and differentiation of indica and japonica rice detected by rflp analysis.
The polymorphism information content pic ranged from 0. To assess the genetic diversity of the rice, 24 intragenic molecular markers representing 17 starch synthesisrelated genes were investigated in 115 taihu basin. Genetic diversity and differentiation of indica and japonica. Genetic diversity analysis of rice germplasm in tripura state. Diversity and population structure of red rice germplasm in.
Evaluation of genetic diversity in rice subspecies using. Genetic diversity and disease control in rice nature. However, it has other uses such as animal feed, production of alcoholic beverages such as wine, rice bran oil, fuel and manufacture of insulation materials chakravarthi and naravaneni, 2006. Preservation of the genetic diversity of a local common carp in the agricultural heritage rice fish system weizheng rena,1, liangliang hua,1, liang guoa,1, jian zhanga, lu tanga, entao zhanga, jiaen zhangb, shiming luob, jianjun tang a,2, and xin chen acollege of life sciences, zhejiang university, hangzhou 310058, china. The higher the level of genetic variation is in a population. The availability of an array of molecular marker systems allowed comparing the efficiency of two of these marker systems to estimate the relationships among various taxa. Diversity of some indonesia local glutinous rice oryza l. However, little study on rice landrace diversity in myanmar has been done. Very few studies, however, have investigated the genetic diversity of aus rice in bangladesh 68. Using rice genetic diversity to support farmers adaptation to climate change for sustainable production and improved livelihoods in india overall objective. Mar 01, 2005 within oryza sativa, there is an ancient and wellestablished divergence between the two major subspecies, indica and japonica, but finer levels of genetic structure are suggested by the breeding history.
There is a wide genetic diversity available in rice among and between landraces. Thus, the present investigation was intended to characterize the genetic resources of local landraces of rice oryza sativa l. Dec 11, 20 level and organization of genetic diversity of rice cultivars. Genetic structure associated with diversity and geographic distribution in the usda rice world collection hesham a.
Hybrid rice suitability in west africa by raafat elnamaky 1, mamadou m. Assessment of the genetic diversity and population. The knowledge of the extent and pattern of diversity in the crop species is a prerequisite for any crop improvement as it helps breeders in deciding suitable breeding strategies for their future improvement. While more comprehensive research into genetic variability, as well. Molecular characterization and genetic diversity analysis of. The objectives of present study were to examine the extent of genetic diversity in korean rice germplasm and the relationship of genetic diversity with the pedigree genotypes of korean rice cultivars. Eizenga abstract a diverse collection of 409 asian rice oryza sativa l.
Genetic diversity and differentiation in indica and japonica groups of the cultivated rice oryza sativa l. Mackill abstract molecular markers can reveal differences among accesmolecular markers are useful tools for evaluating genetic diversity sions at the dna level and thus provide a more direct, and determining cultivar. Genetic diversity of the rice blast fungus in a disease nursery in colombia. A similar finding was reported by behera et al 2012 in 33 medicinal rice genotypes when accessing genetic diversity among them. A total of 49 probes were selected to represent the entire rflp map at intervals of 2030 cm. Knowledge of genetic diversity and relationships among basmati rice genotypes. The objective of this study was to assess the genetic diversity among 40 cultivated varieties and five wild relatives of rice, oryza sativa l. Genetic erosion in traditional rice agroecosystems in southern philippines. Please view the pdf by using the full text pdf link under view to the left. Among them, japonica rice is likely the group derived from the first human manipulations of this species. Pdf analysis of genetic diversity and population structure.
Detailed information about the availability of material pdf. We also evaluated the likelihood of gene flow between wild and. A rice diversity panel evaluated for genetic and agro. Within oryza sativa, there is an ancient and wellestablished divergence between the two major subspecies, indica and japonica, but finer levels of genetic structure are suggested by the breeding history.
Genetic diversity analysis based on genomewide singlenucleotide polymorphism snp assay of a set of indian rice cultivars including modern highyielding varieties and landraces revealed two broad groups, one with aus and the other with indica cultivars. There were 600 pairs of ssr primers screened against 11 rice varieties. The result of genetic diversity analysis on 299 varieties of indica inbred rice. Analysis of genetic diversity and population structure of. The genetic diversity maintained in a species is considered as a function of its ecological and evolutionary history choudhury et al.
The purpose of this study was 1 to evaluate the conservation status of rice landraces in ethnic group areas in southwest of china, 2 to clarify the differences of genetic diversity of rice landraces between exsitu conservation and onfarm conservation over the past 35 years, 3 to explore the impact of traditional cultures on higher. Evaluation of genetic diversity in rice subspecies using microsatellite markers junjian ni, peter m. Multiple streams of genetic diversity in japonica rice biorxiv. The genetic diversity of rice genetic variation in rice can explain both the visible differences between the different varieties and their preference for certain environmental conditions for example, whether they thrive in the lowlands or at higher altitudes. Aug 17, 2000 control plots of monocultured crops allowed us to calculate the effect of diversity on the severity of rice blast, the major disease of rice5. Northeast rice collections are known to possess various agronomically important traits like biotic and abiotic stress tolerance, unique grain and cooking quality. Assessment and utilization of the genetic diversity in.
The similarity coefficients of the rice landraces fluctuated from 0. Genetic diversity of aromatic rice germplasm revealed by. Diversity and population structure of red rice germplasm. Ssr markers have been extensively used to identify genetic variation among rice species ren et al. This study assesses the genetic diversity in a collection of pigmented rice accessions from the philippines. Asian cultivated rice provides a clear picture of multiple foundations of crop diversity. Genetic diversity and population structure of rice. The aim of this study is to examine the genetic variation of about 500 landraces from the aus and boro ecotypes of rice that fall within the aus genetic group of rice based on 384 snp markers. Analysis of genetic diversity of 90 vietnamese localcolored rice accessions was evaluated by using 40 ssr markers.
The project evaluates genotypes and phenotypes in a diverse set of rice accessions and uses association mapping to link genotype and phenotype. Pdf genetic diversity of rice grain quality rochie. The high genetic diversity among rice varieties in the northeast indian region is due to combined effect of ecogeographical conditions, diverse agroecosystems, and diverse human cultural preferences. Preservation of the genetic diversity of a local common. Evaluation of genetic diversity in rice subspecies using microsatellite markers. Genetic variability study of yield and yield related traits. We make use of the 3,000 rice genomes 3k rg data set, first described in 2018, to 29 explore the genetic diversity of traditional japonica.
Pdf genetic diversity analysis of rice faridul islam. A significant amount of this genetic diversity is housed in rice gene banks around the world, with a copy also conserved in the snowy depths of svalbard, norway. Genetic diversity of tropical hybrid rice germplasm. The result based on rapd markers for 18 local rice varieties from tana toraja and enrekang indonesia showed a high level of diversity maulana et al.
Variability assessment for root and drought tolerance traits and. Among 27 them, japonica rice is likely the group derived from the first human manipulations of this 28 species. We make use of the 3,000 rice genomes 3k rg data set, first described in 2018, to explore the genetic diversity of traditional japonica rice. Folk rice varieties, traditional knowledge and nutritional. Diversity estimates are generally lacking for many wild crop relatives.
Analysis of population structure and genetic diversity. Molecular marker based genetic diversity analysis in rice. Thirtyfour microsatellite markers were studied across 21 types of rice to characterize and discriminate among different varieties. The studies on genetic variation, diversity and population structure of rice germplasm of north east india could be an important step for. The distribution patterns of some interesting observations were also carried out. Request pdf genetic diversity and disease control in rice crop heterogeneity is a possible solution to the vulnerability of monocultured crops to disease1, 2, 3. Genetic diversity and disease control in rice request pdf. Genetic diversity international rice research institute. Research open access genetic structure and diversity of.
Evaluation of genetic diversity of localcolored rice. Genetic erosion in traditional rice agroecosystems in. Department of agricultureagricultural research service dale bumpers national rice research center, stuttgart. Genetic diversity in plants 88 cultivated countries. Multiple streams of genetic diversity in japonica rice. Irri seeks to understand rice genetic diversity and uncover new genes and traits in rice that will help rice producers face challenges brought about by climate change, pests and diseases, and other unfavorable conditions. The rice diversity project is a collaborative effort to explore the genetic basis of variation in rice and its wild ancestors. A genetic diversity assessment of starch quality traits in rice. Pdf the objective of present study was to evaluate the genetic polymorphism and identification of diverse parents among the 76 rice accessions using.
Pdf genetic diversity studies in rice oryza sativa l. Sikdar1, nayem zobayer1 1department of genetic engineering and biotechmology, school of life sciences, shahjalal. Genetic diversity of aromatic rice germplasm revealed by ssr. Assessment of genetic diversity and molecular characterization among elite rice varieties of bangladesh is very important for germplasm management, varietal identification, and dna fingerprinting. Assessment of genetic diversity of drought tolerant and. Useful analysis tools in the study of genetic diversity in rice. Genetic diversity and classification of oryza sativa with. Group b consists of 28 isolates from beijing having a diversity of 0. Tai,2 jason coburn, steve kresovich and susan mccouch,3 plant breeding department, cornell university, ithaca, new york 148531901 and u.
Mcclung 2 1university of arkansas, rice research and extension center, stuttgart, usa. The rice genetic diversity is supplemented and supported by a wide spectrum of diversity at the species and ecosystem levels onfarm. Molecular marker based ssr genetic diversity analysis in deep water rice germplasms of bangladesh sadia matin1, m. Wild crop relatives are an important source of genetic diversity for crop improvement. Genetic diversity and population structure of rice varieties. Assessment of genetic diversity in rice oryza sativa l. In order to ascertain the diversity for its possible utilization in rice grain quality improvement in pakistan, local rice genetic resources 475 accessions collected from 3 rice cultivation zones and other parts of the country were investigated for the seed characters. Genotyping of 192 rice lines using 61 ssrs produced a total of 205 alleles with the pic value of 0.
Genetic diversity and population structure of rice varieties cultivated in temperate regions. Aromatic rice cultivars constitute a small but special group of rice and are considered the best in terms of quality and aroma. Agrama 1, wengui yan2, melissa jia2, robert fjellstrom2, anna m. Genetic diversity of rice grain quality intechopen. Marker analysis of these genotypes was carried out for three major drought tolerance qtls as well as green revolution gene, sd1. Sixteen informative primer pairs were selected, having high. Genetic diversity and classification of oryza sativa with emphasis on. Genetic diversity analysis reveals importance of green. Genetic diversity, microsatellites, oryza sativa, rice, temperate japonica germplasm. This diversity is supposed to play an important role in rice genetic improvement. Molecular marker based ssr genetic diversity analysis in.
Subramanian former director of research, tnau, coimbatore abstract rice oryza sativa l. The isolates from the liaoning province, where rice false smut has generated different take. Control plots of monocultured crops allowed us to calculate the effect of diversity on the severity of rice blast, the major disease of rice5. We determined dna fingerprints and pathotypes on international differentials for 151 isolates of the rice blast fungus pyricularia grisea that were collected from 15 rice cultivars at a blast disease breeding nursery in santa rosa, colombia. A rice diversity panel evaluated for genetic and agromorphological diversity between subpopulations and its geographic distribution m. The objective of the present study was to analyze how genetic diversity is distributed within and among populations of the wild rice species oryza glumaepatula in costa rica. Evaluation of genetic diversity in rice subspecies.
Increased knowledge into the genetic diversity of any germplasm collection, therefore, enhances the possibility of crop improvement and the development of superior cultivars. In this study, a sample of 234 accessions of rice was genotyped at. Genetic diversity and population structure of rice landraces. Despite extensive studies on cultivated rice, the genetic structure and subdivision of this crop remain unclear at both global and local scales.
Genetic diversity analysis of traditional rice variety. Genetic diversity is a natural resource for rice breeding to meet current food demands. Genotypingbysequencing gbs is a nextgenerationsequencing based method that takes advantage of reduced representation to enable highthroughput genotyping using a large number of snp markers. As the major element of germplasm, genetic diversity is a natural source for rice breeding to encounter existing food requirements 8. Level and organization of genetic diversity of rice cultivars.
Genetic diversity and population structure of basmati rice oryza. Studies based on the small set of rice genotypes have reported a loss in genetic diversity. Myanmar has diverse agronomic landscape and potentially preserves high level of genetic resources for important crop species. In this study, a sample of 234 accessions of rice was genotyped at 169 nuclear ssrs and two chloroplast loci. Abstract assessment of the genetic diversity and population structure in temperate japonica rice germplasm used in. As far as we know, the collection is one of the earliest collections for rice germplasm resources and therefore we name d it as ting s collection lu et al. In the present study, the genetic diversity and population structure of 141 genotypes including landraces, farmers varieties, elite cultivars and advanced breeding lines of basmati rice accession collected from nw himalayas were analyzed using 40 highly polymorphic trait linked ssr markers.
Molecular characterization and genetic diversity analysis. Pdf genetic diversity and population structure of rice. Rice is mainly used as a major source of human food. Our study indicated a moderate level of diversity among 16 rice genotypes. Exploring the genetic diversity within traditional. The northeastern region ner of india, comprising of arunachal pradesh, assam, manipur, meghalaya, mizoram, nagaland and tripura, is a hot spot for genetic diversity and the most probable origin of rice. Jan 24, 2020 indepth studies on the genetic diversity of crops indicate that domestication is likely a drawnout process that differs from the traditional representation of a simple rapid bottleneck. The numbers of polymorphic alleles ranged from 3 to 12 alleles per locus and average of 7. Putting plant genetic diversity and variability at. Ensure that rural communities are able to maintain and adapt traditional rice genetic diversity and to combine such actions with the introduction of new varieties landraces. Genetic diversity analysis of rice cultivars oryza sativa. Ever since the very beginning of agriculture more than 10 000years ago, during the process of domestication and cultivation of crop plants, a wealth of genetic diversity has been utilized and partly preserved.
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