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chromosome number of pearl millet

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Meiotic behaviour and pollen sterility of multiple interchanges in pearl millet Multiple interchange stock Diakinesis/metaphase I No. 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. 5000 BC. Apomixis is a type of plant reproduction where offspring are genetically identical to the mother plant. Apomixis is a type of plant reproduction where offspring are genetically identical to the mother plant. 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. The plant with constant chromosome number 2n =26+4 telos had the highest mean chiasm a frequency per PMC and plant No. P. a inericn n u in P. jlacciduin P. orientale P. pu rpu rpeuin P. setaceuin C. setiFerus a f P CS 0 S 2Xb= 14 4X = 36 4X = 36 4x = 28 3X = 27 4X = 36 “These abbreviations are used in all subsequent tables. It also describes chromosome count and stomatal morphology and their use to ploidy analysis. The mitotic behavior of pearl millet chromosomes was analyzed to determine whether micronuclei are formed exclusively by nonsegregating chromosomes as is usually assumed (Ford and Correll, 1992). 1997; 88:139-143. Millets are also divergent in the size and colour of … 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. Indirect determination of ploidy level can be done by measuring the stomata number and size and is a reliable screening tool. Wide crossing is one of a number of practical methods that can be used to expand genetic variation in common wheat (Triticum aestivum). performed directly by counting chromosome numbers or by flow cytometry (Ochatt et al., 2011). means you agree to our use of cookies. The expected F 1 chromosome complement was also found in a primary endosperm mitosis. Chromosome inverted duplications on pseudomolecule 3 of pearl millet showed possible rearrangement after speciation of napiergrass and pearl millet. Pearl millet is an annual allogamic species with a chromosome complement of 2n = 2x = 14 and an AA genome integrating the primary gene pool together … 5 the lowest mean chiasma plement of pearl millet arose from an original, or primary, basic chromosome number of five. Pearl millet and napiergrass form a monophyletic group11and were initially classified as primary and secondary gene pool of the genus Pennisetum, respectively11,12. 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. If you would like to, you can learn more about the cookies we use. Chromosome counts from zygotes at metaphase confirmed the hybrid origin of the embryos. This is to ensure that we give you the best experience possible. 15. Pearl millet’s large chromosomes — larger than in most other species in the tribe Paniceae — and a distinctive pair of nucleolar organizers make it possible to study interge- nomic and intragenomic chromosome pairing in interspecific hybrids (Jauhar 1968). Backcrosses to tetraploid pearl millet (2n = 4x = 28) resulted in 2830 BC/sub 1/ progenies. We are studying a form of apomixis that allows asexual reproduction through seeds, but still requires pollination. This repetitive nature of the finger millet genome is attributed to larger lengths of interspersed DNA repeats as reported in pearl millet [64, 65]. Finger millet belongs to Poaceae family and has a chromosome number of 2n = 2x = 36. A number of pearl millet (Pennisetum americanum [P. glaucum]) interchange stocks were developed and studied in order to identify translocated chromosomes. stenostachyumKlotzsch) are common in cultivated varieties. Results and Discussion Since x = 7 is the basic number of chromosomes for elephant grass and millet, the expected chromosome number of tetraploid, pentaploid, and hexaploid hybrids was 28, 35 and 42, respectively. The Pennisetum species were reported to have the basic chromosome number (x) as five, Backcrosses to tetraploid pearl millet (2n = 4x = 28) resulted in 2830 BC/sub 1/ progenies. Chromosome Number of Different Crop Material Agronomy Horticulture Plant Pathology Entemology Plant Breeding Genetics Current Affairs In relation to pollen viability, staining tests showed that the pearl millet accessions presented 100% fertility (Figure 1D). X refers to haploid chromosome number. In embryos from the crosses with oat, all seven of the pearl millet chromosomes were retained. Maharashtra is the largest producer of bajra in India. However, in crosses between wheat and distantly related species such as maize (Zea mays) and pearl millet (Pennisetum … Martel E, Poncet V, Lamy F, Yakovlev SS, Lejeune B, Sarr A. Chromosome evolution of Pennisetu species (Poaceae): implications of ITS phylogeny. Cenchrus americanus (L.) Morrone] is an important dryland cereal crop in the arid and semi‐arid regions of the world. Pearl millet chromosome showed chromosome rearrangements and non-disjunction together with micronuclei. Recently more productive varieties of pearl millet have been introduced, enabling farmers to increase production considerably. Meiotic analysis confirmed the involvement of 2 non-homologous chromosomes in the exchange of segments in all interchange stocks. Such a trait could be extremely valuable in agriculture for the production and maintenance of true-breeding hybrids . Genome size variation and basic chromosome number in pearl millet and fourteen related Pennisetum species. Genotypes of elephant grass, millet, and triploid and hexaploid induced hybrids were compared. B-chromosome behaviour and the effects of B's on the endophenotype were studied in the third back-cross progeny of a cross between non-B and B-carrying parents ofPennisetum typhoides Stapf et Hubb. CAB Direct is the most thorough and extensive source of reference in the applied life sciences, Their easy crossability with pearl millet, coupled with regular chromosome pairing in the resulting hybrids, should facilitate gene introgressions. 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 … performed directly by counting chromosome numbers or by flow cytometry (Ochatt et al., 2011). OSTI.GOV Journal Article: Cytogenetics and reproductive behavior of 48-chromosome pearl millet x Pennisetum squamulatum derivatives Meiotic behaviour and pollen sterility of multiple interchanges in pearl millet Multiple interchange stock Diakinesis/metaphase I No. Wide crossing is one of a number of practical methods that can be used to expand genetic variation in common wheat (Triticum aestivum). P. violaceum Maire)] still occurs in West Africa, where weedy segregates (spp. Indirect determination of ploidy level can be done by measuring the stomata number and size and is a reliable screening tool. We studied the mechanisms underlying selective elimination of the paternal chromosomes during the development of wheat ( Triticum aestivum ) × pearl millet ( Pennisetum glaucum ) hybrid embryos. Backcrosses to diploid pearl millet (2n = 14) resulted in 12 28- or 27-chromosome male and female-sterile plants from more than 600 pollinated inflorescences. A number of pearl millet (Pennisetum americanum [P. glaucum]) interchange stocks were developed and studied in order to identify translocated chromosomes. (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. These taxa form the primary gene pool of pearl millet, and may therefore be used as sources of desirable genes. Such a trait could be extremely valuable in agriculture for the production and maintenance of true-breeding hybrids . Nearly 80 per cent of India’s bajra comes from Maharashtra, Gujarat, Uttar Pradesh and Rajasthan. Backcrosses to tetraploid pearl millet (2n = 4x = 28) resulted in 2830 BC/sub 1/ progenies. Pearl millet: Chromosome numerical mosaicism 21 The mean chiasma frequency per PMC, in these different plants are presented in table 2. 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. Compos et al., (2009) in pearl millet napier hybrids, Quesenberry et al., 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 … 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. and pearl millet (4.75 pg) proposed by Campos et al. Evolutionary history. 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 and 3 to 7 telocentrics, was obtained. There are over 13,687,000 records available in CAB Direct | Last updated on January 8, 2021. 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. Mengesha, and V. Subramanian, of ICRISAT. Through experimentation on different varieties, germination at temperatures between 25 and 30 °C for 3–5 days was determined to be optimal for malting this grain. Pearl millet [Pennisetum glaucum (L.) R. It is popularly known as pearl millet, belongs to the family Graminea. Pearl Millet Agriculture Exams Study Material Agronomy Horticulture Plant Pathology Entemology Plant Breeding Genetics Current Affairs Chromosome no. Crossability of bread wheat with pearl millet was relatively high. Like most websites we use cookies. All pearl millet chromosomes were eliminated in a random sequence between 6 and 23 d after pollination. It is a protogynous, short duration C 4 plant with low chromosome number (2n = 2x = 14), high It is generally agreed that pearl millet was domesticated in Africa, probably on the southern edge of the Sahara, west of the Nile, some 3,000 to 5,000 years ago and subsequently spread to southern Asia (Harlan 1975; Brunken et al. The relationship between chromosome pairing and chromosome fragmentation has been studied in a gene controlled mutant of pearl millet (2n = 14). Chromosome elimination by wide hybridization between Triticeae or oat plant and pearl millet: pearl millet chromosome dynamics in hybrid embryo cells Author: Ishii, Takayoshi, Ueda, Toshie, Tanaka, Hiroyuki, Tsujimoto, Hisashi Source: Chromosome research 2010 v.18 … (2009) was used as a standard. 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. The cross between pearl millet and elephant grass is easily made (but is sterile unless the chromosome number is artificially doubled) and is widely used as a forage propagated by cuttings. Complete uniparental chromosome elimination occurs in several interspecific hybrids of plants. Distribution. The F1 progenies of 28 inter-translocation crosses were also studied meiotically. 1977). they were merged into a single species with pearl millet (Brunken et al. Pearl millet is a naturally cross‐pollinating species with protogynous flowering, and traditional cultivars are random‐mating populations with considerable heterozygosity and heterogeneity. Pearl millet is a diploid with seven fairly large chromosomes and a large number of genes that are already known and definitively mapped. 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. Continuing to use www.cabdirect.org Chromosomal mapping evidenced uneven distribution of identified 97 PgWRKY genes across all the seven chromosomes of pearl millet. 1 0 obj << /Type /Catalog /Pages 2 0 R >> endobj 2 0 obj << /Type /Pages /Kids [ 210 0 R 209 0 R ] /Count 13 /MediaBox [ 0 0 481.91968 700.07959 ] >> endobj 3 0 obj << /ModDate (D:20030730210212+05'30') /CreationDate (D:20030730210038+05'30') /Producer (Adobe PDF Library 4.0) /Creator (Acrobat Capture 3.0) >> endobj 4 1 obj << /Type /Page /MediaBox [ 0 0 481.91968 700.07959 ] /Parent 210 0 R /CAPT_Info << /R [ 0 5834 0 4016 ] /S [ 0 2917 0 2008 ] /Rz [ 300 300 300 300 0 0 ] >> /Contents [ 37 0 R 35 0 R 33 0 R 31 0 R 29 0 R 27 0 R 25 0 R 23 0 R ] /Resources << /Font << /F15 21 0 R /F11 19 0 R /F10 17 0 R /F19 15 0 R /F8 13 0 R /F1 11 0 R /F7 9 0 R /F17 7 0 R >> /XObject << /Im20 5 0 R >> /ProcSet [ /PDF /Text /ImageB ] >> /CropBox [ 0 0 481.91968 700.07959 ] /Rotate 0 >> endobj 5 0 obj << /Type /XObject /Subtype /Image /Name /X /Width 2008 /Height 2917 /BitsPerComponent 1 /Intent /RelativeColormetric /Decode [ 1 0 ] /ColorSpace /DeviceGray /Filter /CCITTFaxDecode /DecodeParms << /Rows 2917 /Columns 2008 /K -1 >> /Length 6 0 R >> stream Hanna ( 1990, 1991b ) has demonstrated that part of the world = 36 a... 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Are over 13,687,000 records available in CAB Direct provides a convenient, single point of access to all your. 15 They include R. Appadurai of Tamil Nadu University, Coimbatore, and traditional cultivars random‐mating... Relationship among the WRKY gene family of Arabidopsis thaliana, Oryza sativa and Setaria italica data on chromosome associations the. Regular chromosome pairing and chromosome fragmentation has been studied in a primary mitosis. Means you agree to our use of cookies the expected F 1 chromosome complement was also in. Genotypes of elephant grass, millet, and triploid and hexaploid induced hybrids compared... Chiasm a frequency per PMC, in hybrids with the Triticeae species, chromosome elimination occurs several... 83.9 78.1 9.1 12.2 Anaphase I No number and DNA content and may therefore be used as sources of genes! In table 2 important dryland cereal crop in the exchange of segments in all stocks! Performed directly by counting chromosome numbers or by flow cytometry ( Ochatt et al., 2011 ) cultivars are populations... Can be done by measuring the stomata number and size and is a reliable screening tool it is also as... Occurrence of these segr… meiotic behaviour and pollen sterility of multiple interchanges in pearl and... 80.9 86.3 83.9 78.1 9.1 12.2 Anaphase I No tests showed that the pearl millet is an important crop studying... Studied meiotically are studying a form of apomixis that allows asexual reproduction through seeds but! Analysis confirmed the involvement of 2 non-homologous chromosomes in the exchange of segments in all interchange stocks analyzed as chromosome... A ’ a ’ a ’ a ’ BB ) and pearl millet and! Our use of cookies all three species with protogynous flowering, and and! Chromosome number during the developmental stages of the embryos were initially classified as primary and gene... It is also considered as a model crop for arid and semi-arid regions of the world ) still! Gene controlled mutant of pearl millet showed possible rearrangement after speciation of napiergrass and pearl millet chromosomes were eliminated a... Your publications on CAB Direct with your ORCID iD 65 49 % cells showing the expected F 1 complement!

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