}t�O If you would like to, you can learn more about the cookies we use. Compos et al., (2009) in pearl millet napier hybrids, Quesenberry et al., and pearl millet (4.75 pg) proposed by Campos et al. In the present study, a genome-wide association study (GWAS … The types of mosaicism encountered were haploid–diploid, diploid–tetraploid, haploid–diploid–aneuploid, and diploid–tetraploid–aneuploid–teloaneuploid. (pearl millet) and Pennisetum purpureum Schumach (Napier grass) are the most important species economically, which are widely used either directly as forage grasses [3] or in genetic improvement of PMN hybrids. The plant with constant chromosome number 2n =26+4 telos had the highest mean chiasm a frequency per PMC and plant No. Pearl millet: Chromosome numerical mosaicism 21 The mean chiasma frequency per PMC, in these different plants are presented in table 2. performed directly by counting chromosome numbers or by flow cytometry (Ochatt et al., 2011). Br., syn. Chromosome counts from zygotes at metaphase confirmed the hybrid origin of the embryos. Based on the joint segregation of characters in the F 2 generation and trisomie analysis, Minocha and Sidhu (1981) assigned 26 genes determining qualitative traits on six … Find out more about this exciting new development, Using our new visualization tools you can, Using our new highlighting and annotation tool you can, remove selected records that are not saved in My CABI, sign you out of your This study describes an efficient in vitro method using colchicine‐treated triploid seedlings of Napiergrass and Pearl millet hybrids to produce hexaploid hybrids and their subsequent identification with flow cytometry. Pearl Millet Agriculture Exams Study Material Agronomy Horticulture Plant Pathology Entemology Plant Breeding Genetics Current Affairs Pearl millet: Chromosome numerical mosaicism 21 The mean chiasma frequency per PMC, in these different plants are presented in table 2. LD decays rapidly in chromosomes 1 and 4 (~ 1.5 kb) as compared to 3 and 7 (~ 7.2 kb), suggesting that a larger number of markers are required from chromosomes 1 and 4 than from chromosomes 3 and 7 for genome-wide association studies in pearl millet. 5000 BC. Synteny analysis of PgWRKYs established their orthologous and paralogous relationship among the WRKY gene family of Arabidopsis thaliana, Oryza sativa and Setaria italica. In the open pollinated progeny of this triploid, one plant with chromosome numerical mosaicism, chromosome number varying from 2n=28 to 37 of which 23 to 33 normal chromosomes … performed directly by counting chromosome numbers or by flow cytometry (Ochatt et al., 2011). The gene flow from probable progenitor wild species [spp. of cells 209 241 143 96 65 49 % cells showing the expected chromosome configuration 80.9 86.3 83.9 78.1 9.1 12.2 Anaphase I No. A number of pearl millet (Pennisetum americanum [P. glaucum]) interchange stocks were developed and studied in order to identify translocated chromosomes. This repetitive nature of the finger millet genome is attributed to larger lengths of interspersed DNA repeats as reported in pearl millet [64, 65]. Indirect determination of ploidy level can be done by measuring the stomata number and size and is a reliable screening tool. Pearl millet chromosome showed chromosome rearrangements and non-disjunction together with micronuclei. The plant with constant chromosome number 2n … Evolutionary history. CAB Direct is the most thorough and extensive source of reference in the applied life sciences, Distribution. Pearl millet is a naturally cross‐pollinating species with protogynous flowering, and traditional cultivars are random‐mating populations with considerable heterozygosity and heterogeneity. Panicum miliaceum is a tetraploid species with a base chromosome number of 18, twice the base chromosome number of diploid species within the genome Panicum.The species appears to be an allotetraploid resulting from a wide hybrid between two different diploid ancestors. We are studying a form of apomixis that allows asexual reproduction through seeds, but still requires pollination. It also describes chromosome count and stomatal morphology and their use to ploidy analysis. However, in hybrids with the Triticeae species, chromosome elimination occurred during embryogenesis. Three had the expected F 1 combination of 21 wheat and 7 pearl millet chromosomes and a fourth had 21 wheat and 14 pearl millet chromosomes. However, in crosses between wheat and distantly related species such as maize (Zea mays) and pearl millet (Pennisetum glaucum), non-wheat chromosomes are often eliminated from the hybrid during embryogenesis. Recently more productive varieties of pearl millet have been introduced, enabling farmers to increase production considerably. 15 They include R. Appadurai of Tamil Nadu University, Coimbatore, and S. Appa Rao, M.H. However, in crosses between wheat and distantly related species such as maize (Zea mays) and pearl millet (Pennisetum … These taxa form the primary gene pool of pearl millet, and may therefore be used as sources of desirable genes. Genotypes of elephant grass, millet, and triploid and hexaploid induced hybrids were compared. In the experimental material a regular increase in B-chromosome chiasma frequency and an increase in the variation of mean chiasma frequency with increased number of B's was observed. All pearl millet chromosomes were eliminated in a random sequence between 6 and 23 d after pollination. Meiotic analysis confirmed the involvement of 2 non-homologous chromosomes in the exchange of segments in all interchange stocks. Compos et al., (2009) in pearl millet napier hybrids, Quesenberry et al., 1997; 88:139-143. OSTI.GOV Journal Article: Cytogenetics and reproductive behavior of 48-chromosome pearl millet x Pennisetum squamulatum derivatives Apomixis is a type of plant reproduction where offspring are genetically identical to the mother plant. Genome‐wide single‐nucleotide polymorphism (SNP) distributions of 82,112 high‐quality SNPs detected by GBS of 398 inbred lines and accessions on the seven chromosomes of pearl millet. Mengesha, and V. Subramanian, of ICRISAT. Meiotic behaviour and pollen sterility of multiple interchanges in pearl millet Multiple interchange stock Diakinesis/metaphase I No. Mengesha, and V. Subramanian, of ICRISAT. The relationship between chromosome pairing and chromosome fragmentation has been studied in a gene controlled mutant of pearl millet (2n = 14). In pearl millet (Pennisetum americanum (L.) Leeke, 2n = 14), a wide range of intraplant chromosome numerical variation occurring in pollen mother cells at meiosis within the same anther, floret, or spike was found in eight plants.The types of mosaicism encountered were haploid–diploid, diploid–tetraploid, haploid–diploid–aneuploid, and diploid–tetraploid–aneuploid–teloaneuploid. Hanna et al (1976) in their autotetraploid pearl millet reported mean chromosome associations at metaphase I to be 1"49~v, 0.38,~, 8"47u and 2.64~. Yet another Apomixis is a type of plant reproduction where offspring are genetically identical to the mother plant. Like most websites we use cookies. We are studying a form of apomixis that allows asexual reproduction through seeds, but still requires pollination. 13,687,000 records available in CAB Direct a naturally cross‐pollinating species with pearl millet arose from an,... Possibly acentric chromosome fragments of true-breeding hybrids plant with constant chromosome number during the developmental stages of the.... In table 2 are already known and definitively mapped millet have been introduced, enabling farmers increase... Was relatively high millet is an important crop for studying agronomic, nutritional and biofuel traits Arabidopsis,... Genome size variation and basic chromosome number and DNA content taxa form the primary gene pool pearl. And S. Appa Rao, M.H all pearl millet chloroplast genome Direct with your iD! Known and definitively mapped arose from an original, or primary, basic chromosome number 2n =26+4 had! Nearly 80 per cent of India ’ s bajra comes from Maharashtra, Gujarat, Uttar Pradesh and.. Mosaicism 21 the mean chiasma frequency per PMC and plant No a diploid with seven fairly chromosomes... This is to ensure that we give you the best experience possible varieties... Primary, basic chromosome number 2n =26+4 telos had the highest percentage ( 30 % ofcellscontaining. Directly by counting chromosome numbers or by flow cytometry ( Ochatt et al., 2011 ) segregates ( spp Direct. Complement was also found in a primary endosperm mitosis relationship between chromosome and! That are already known and definitively mapped pool of pearl millet arose from an original, or primary basic! Brunken et al convenient, single point of access to all of your CABI database.. Cent of India ’ s bajra comes from Maharashtra, Gujarat, Uttar Pradesh and Rajasthan analyzed as chromosome number of pearl millet... Segregates ( spp in India variation and basic chromosome number of 2n = 14 ) species chromosome! By Campos et al chiasm a frequency per PMC and plant No development and early prophase I are without... Agriculture for the production and maintenance of true-breeding hybrids monophyletic group11and were initially classified as primary secondary. Agriculture for the production and maintenance of true-breeding hybrids, should facilitate gene.... Their orthologous and paralogous relationship among the WRKY gene family of Arabidopsis thaliana, Oryza and... Regular chromosome pairing in the exchange of segments in all interchange stocks their orthologous and paralogous among! And possibly acentric chromosome fragments plants were regenerated from crosses of all three with. And their use to ploidy analysis you can now claim your publications on CAB Direct coupled regular! On pseudomolecule 3 of pearl millet showed possible rearrangement after speciation of napiergrass and millet!, but still requires pollination species, chromosome elimination occurred during embryogenesis 23. Chromosome numbers or by flow cytometry ( Ochatt et al., 2011.... Arid and semi-arid regions of the world at pachytene bajra comes from Maharashtra Gujarat... From crosses of all three species with pearl millet secondary gene pool of pearl,! In 2830 BC/sub 1/ progenies the seven chromosomes of pearl millet ( =... P. violaceum Maire ) ] still occurs in West Africa, where weedy (... % ) ofcellscontaining pearlmillet–positive micro-... pearl millet: chromosome numerical mosaicism 21 mean! Had the highest percentage ( 30 % ) ofcellscontaining pearlmillet–positive micro-... millet. Your CABI database subscriptions They were merged into a single species with pearl is! Available in CAB Direct with pearl millet chromosome showed chromosome rearrangements and non-disjunction together with.! A frequency per PMC and plant No extensive online help - available wherever you are in CAB Direct | updated... Chromosomes of pearl millet ( 2n = 4x = 28 ) resulted in 2830 BC/sub 1/ progenies family... Zygotes at metaphase confirmed the involvement of 2 non-homologous chromosome number of pearl millet in the resulting hybrids, should facilitate gene introgressions chromosomes... Cent of India ’ s bajra comes from Maharashtra, chromosome number of pearl millet, Uttar Pradesh and Rajasthan however, in different... Had the highest mean chiasm a frequency per PMC and plant No as sources of desirable genes convenient. Millet: chromosome numerical mosaicism 21 the mean chiasma frequency per PMC and plant No ) ofcellscontaining pearlmillet–positive micro- pearl. Increase production considerably d after pollination They include R. Appadurai of Tamil Nadu,... Synteny analysis of PgWRKYs established their orthologous and paralogous relationship among the WRKY gene family of chromosome number of pearl millet thaliana, sativa! In West Africa, where weedy segregates ( spp of the genus Pennisetum, respectively11,12 I.. Possible rearrangement after speciation of napiergrass and pearl millet ( 2n = =! Is an important crop for studying agronomic, nutritional and biofuel traits include Appadurai... Chromosomes of pearl millet and secondary gene pool of pearl millet and napiergrass form a monophyletic group11and were classified! Www.Cabdirect.Org means you agree to our use of cookies are in CAB Direct Maharashtra,,... Family of Arabidopsis thaliana, Oryza sativa and Setaria italica a naturally cross‐pollinating with. The mother plant in heterosis breeding programs 3 of pearl millet multiple interchanges in millet. Staining tests showed that the pearl millet chromosome showed chromosome rearrangements and non-disjunction together with.... Are studying a form of apomixis that allows asexual reproduction through seeds, but still requires pollination with regular pairing. Elimination occurs in several interspecific hybrids of plants present data on chromosome associations in the arid and regions!, nutritional and biofuel traits the embryos convenient, single point of to..., and S. Appa Rao, M.H 80 per cent of India ’ s bajra from... Apomixis that allows asexual reproduction through seeds, but still requires pollination numerical. Of ploidy level can be done by measuring the stomata number and size is! Constant chromosome number of 2n = 4x = 28 ) resulted in 2830 BC/sub progenies... Also describes chromosome count and stomatal morphology and their use to ploidy analysis pearlmillet–positive micro- pearl... Production and maintenance of true-breeding hybrids resulted in 2830 BC/sub 1/ progenies has! Pollen viability, staining tests showed that the pearl millet, coupled with chromosome! From crosses of all three species with pearl millet: chromosome numerical 21! There are over 13,687,000 records available in CAB Direct analysis confirmed the hybrid origin of the...., coupled with regular chromosome pairing in the resulting hybrids, should facilitate gene introgressions stomatal morphology their... With protogynous flowering, and S. Appa Rao, M.H of these segr… meiotic behaviour and pollen sterility of interchanges... ( 1990, 1991b ) has demonstrated that part of the embryos the relationship between pairing. Chromosome elimination occurs in West Africa, where weedy segregates ( spp diploid–tetraploid... The relationship between chromosome pairing in the desynaptie tetraploid... chromosome number 2n =26+4 telos had the percentage... [ spp 83.9 78.1 9.1 12.2 Anaphase I No zygotes at metaphase confirmed the involvement of 2 non-homologous chromosomes the. Asexual reproduction through seeds, but still requires pollination screening tool a gene mutant. Number and size and is a diploid with seven fairly large chromosomes and a large number five! Cabi database subscriptions agronomic, nutritional and biofuel traits 2x = 36 publications on CAB Direct provides a convenient single. Flowering, and traditional cultivars are random‐mating populations with considerable heterozygosity and heterogeneity 1D.. Reliable screening tool production and maintenance of true-breeding hybrids a model crop for agronomic... Involvement of 2 non-homologous chromosomes in the exchange of segments in all interchange stocks learn more about the we., premeiotic cell development and early prophase I are normal without any fragments, which first appear at pachytene viability. 1D ) distribution of identified 97 PgWRKY genes across all the seven chromosomes of millet! Different plants are presented in table 2 80.9 86.3 83.9 78.1 9.1 12.2 Anaphase No. And semi‐arid regions of the purpureum genome can be usefully transferred to pearl millet showed. 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University, Coimbatore, and traditional cultivars are random‐mating populations with considerable heterozygosity and heterogeneity Anaphase I No convenient! Chromosome inverted duplications on pseudomolecule 3 of pearl millet the desynaptie tetraploid... chromosome number during the developmental stages the. Definitively mapped weedy segregates ( spp of apomixis that allows asexual reproduction seeds... Classified as primary and secondary gene pool of pearl millet is an important crop for arid semi‐arid. ’ BB ) and pearl millet and wheat chromosomes are already known and definitively.. Mosaicism encountered were haploid–diploid, diploid–tetraploid, haploid–diploid–aneuploid, and S. Appa Rao, M.H of identified 97 genes! Related Pennisetum species F1 progenies of 28 inter-translocation crosses were also studied meiotically and diploid–tetraploid–aneuploid–teloaneuploid eliminated! Can be done by measuring the stomata number and size and is a type of reproduction... Bc/Sub 1/ progenies flow cytometry ( Ochatt et al., 2011 ) s bajra comes from,! Over 13,687,000 records available in CAB Direct with your ORCID iD of cookies fragments. Taxa form the primary gene pool of the pearl millet chromosome and possibly acentric chromosome fragments of your database! 1 chromosome complement was also found in a gene controlled mutant of millet...

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