نتایج جستجو برای: b chromosome
تعداد نتایج: 1002957 فیلتر نتایج به سال:
Poor germination has been the main obstacles to widespread adoption of rainfed lowland rice production due saturated state soil, . In order produce types appropriate for direct seeded culture, current experiment was conducted find with anaerobic tolerance. The screening techniques tray method were used assess tolerance 402 different genotypes. Under conditions, genotypes 10 namely, IR 129077:1-...
Drimia is a heterogeneous, poorly understood genus that requires major rearrangement. Chromosome behavior of gigantea and viridula; two species in D. altissima complex was studied for karyotypes transmission extra chromosomes pair pollen viability. Meristematic cells at the root tips viridula were by conventional cytogenetic karyotype analysis. numbers 2n = 22 20 viridula, respectively. Extra c...
Background: Recurrent pregnancy loss is a form of infertility with at least three consecutive pregnancy losses or more. Y chromosome microdeletions are a class of most likely genetic factors that occur in a special zone of Y chromosome which is named azoospermia factor region. The purpose of this study was to analyze the presence of Y chromosome complete microdeletions in male partner of couple...
Eleven populations of five Avena species were analysed for meiotic characters including chiasma frequency and distribution as well as chromosomal association and segregation. Plants of a single population of A. eriantha showed the presence of 2n = 14 (diploid) and 2n = 4x = 28 chromosome number. Populations of A. barbata and A. wiestii possessed n = 14, while populations of A. sterilis ssp. lud...
رفتار میوزی برای اولین بار در زیر گونه Crocus cancellatus subsp. damascenus (سیتوتیپ 2n=8A ) گزارش میشود. نتایج نشان میدهد که این زیر گونه (سیتوتیپ 2n=8A) دارای مجموعه کروموزومی 2n=8 و عدد گامتی n=4 میباشد. دو جفت کروموزوم به هستک متصل بود که تایید کننده حضور دو جفت کروموزوم قمردار در این زیر گونه میباشد. حضور یک عدد B کروموزوم در هر دو مرحله میوز و میتوز در این سیتوتیپ برای اولین بار گزارش...
Although chromosome aberrations in T lymphocytes and bone marrow cells have been reported in atomic bomb survivors, the presence of chromosome abnormalities has not been demonstrated in B lymphocytes because of the technical difficulties involved in B-lymphocyte separation. A method for detecting chromosome aberrations in B lymphocytes was established by “stimulation” of B lymphocytes with Epst...
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