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Performance of backcrosses involving transgressant doubled haploid lines in rice under contrasting moisture regimes: yield components and marker heterozygosity. (Cell Biology & Molecular Genetics).
Crop Science; 7/1/2003; Toorchi, Mahmoud Shashidhar, H.E. Gireesha, T.M. Hittalmani, Shailaja; 787 words
; ... and P467) transgressants for maximum root length were chosen from rice doubled haploid (DH) mapping population of IR64/Azucena. Each transgressant doubled haploid line was backcrossed to IR64. The nine B[C.sub.1][F.sub.1] populations, their parents ...
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In Vitro Haploid Production in Higher Plants. Volume 2: Applications.(Review)
Crop Science; 1/1/1999; Jauhar, Prem P.; 787 words
; ... haploids and doubled haploids (DH) in crop improvement ... uniquely associated with haploid derivation. The volume ... microspore-derived doubled haploids (DH) in some of the ... microspores at the single cell stage offers some ... Production of green haploid plants in large ...
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High Rates of "Unselected" Aneuploidy and Chromosome Rearrangements in tel1 mec1 Haploid Yeast Strains
Genetics; 5/1/2008; Vernon, Michael; Lobachev, Kirill; Petes, Thomas D; 787 words
; ... detection of DNA damage and in the regulation of telomere length. Haploid yeast tel1 mec1 strains were subcultured nonselectively for ~200 cell divisions. The subcultured strains had very high rates of ... CAN1 gene located near the end of chromosome V in a wild-type haploid strain is ~4 10^sup ...
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Cypress Surrogate Mother Produces Haploid Progeny From Alien Pollen
Genetics; 1/1/2008; Pichot, Christian; Liens, Benjamin; Nava, Juana L Rivera; Bachelier, Julien B; Maâtaoui, Mohamed El; 787 words
; ... dupreziana seedlings; the other progeny were haploid or diploid C. sempervirens seedlings ... sexual cycle follows the alternation of haploid and diploid cells delimited by meiosis ... from maternal tissue, either a somatic cell or a gamete with the somatic chromosome ... of a reduced gameto-phyte produces a ...
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Male Germ Line Development in Arabidopsis. duo pollen Mutants Reveal Gametophytic Regulators of Generative Cell Cycle Progression1[w]
Plant Physiology; 1/1/2005; Durbarry, Anjusha; Vizir, Igor; Twell, David; 787 words
; ... through the first haploid division at pollen ... of the generative cell cycle. Mutant generative ... produced by the haploid gametophyte generation ... restricted to a simple cell lineage of two cell ... in the control of cell cycle progression in specific cell lineages. The simple ...
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The Arabidopsis gene Tardy Asynchronous meiosis is required for the normal pace and synchrony of cell division during male meiosis
Plant Physiology; 11/1/2001; Magnard, Jean-Louis; Yang, Ming; Chen, Yun-Chia Sophia; Leary, Michele; McCormick, Shelia; 787 words
; ... Normal Pace and Synchrony of Cell Division during Male Meiosis1 ... organisms features synchronous cell divisions in a large number ... linked to the regulation of cell cycle progression. Here, we ... of delayed and asynchronous cell divisions during male meiosis ... cytokinesis yields a tetrad of ...
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Lrg1p Is a Rho1 GTPase-Activating Protein Required for Efficient Cell Fusion in Yeast
Genetics; 10/1/2004; Fitch, Pamela G; Gammie, Alison E; Lee, Debbie J; de Candal, Valeria Brizzio; Rose, Mark D; 787 words
; ... caused decreased rates of cell fusion and diploid formation ... combination with other cell fusion mutations. Consistent with an involvement in cell fusion, Lrg1p localized ... a Rho1p-GAP involved in cell fusion and speculate that it acts to locally inhibit cell wall synthesis to aid ...
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Targeted Degradation of the Cyclin-Dependent Kinase Inhibitor ICK4/KRP6 by RING-Type E3 Ligases Is Essential for Mitotic Cell Cycle Progression during Arabidopsis Gametogenesis(W)(OA)
Plant Cell; 6/1/2008; Liu, Jingjing; Zhang, Yiyue; Qin, Genji; Tsuge, Tomohiko; Sakaguchi, Norihiro; Luo, Guo; Sun, Kangtai; Shi, Dongqiao; Aki, Shiori; Zheng, Nuoyan; Aoyama, Takashi; Oka, Atsuhiro; Yang, Weicai; Umeda, Masaaki; Xie, Qi; Gu, Hongya; Qu, Li-Jia; 787 words
; ... mechanisms regulating mitotic cell cycle progression are not ... interphase arrest of the mitotic cell cycle at the microspore stage ... diploid sporophytic phase and a haploid gametophytic phase. In angiosperms ... female sporophytes produce haploid microspores and megaspores ... meiosis of the megaspore ...
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Aneuploidy: Cells Losing Their Balance
Genetics; 6/1/2008; Torres, Eduardo M; Williams, Bret R; Amon, Angelika; 787 words
; ... not the exact multiple of the haploid karyotype is known as aneuploidy ... exact multiple of the usually haploid number. This condition is distinct ... that generally interferes with cell proliferation and decreases ... average, only ≤0.5% of the haploid genome is tolerated as heterozygous ...
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Misexpression of the cyclin-dependent kinase inhibitor ICK1/KRP1 in single-celled Arabidopsis trichomes reduces endoreduplication and cell size and induces cell death
Plant Cell; 2/1/2003; Schnittger, Arp; Weinl, Christina; Bouyer, Daniel; Schobinger, Ulrike; Hulskamp, Martin; 787 words
; ... investigated the function of the CDK inhibitor ICK1/KRP1 on cell growth and differentiation independent of any compensatory ... Arabidopsis trichomes as a model system. By analyzing cell size with respect to DNA content, we dissected cell growth in a DNA-dependent and a DNA-independent ... misexpression ...
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