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2 edition of Genetic analysis of flowering time in arabidopsis. found in the catalog.

Genetic analysis of flowering time in arabidopsis.

Jonathan H. Clarke

Genetic analysis of flowering time in arabidopsis.

by Jonathan H. Clarke

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Published by University of EastAnglia in Norwich .
Written in English


Edition Notes

Thesis (Ph.D.), University of East Anglia, School of Biological Sciences, 1993.

ID Numbers
Open LibraryOL20717266M

The FRIGIDA locus (FRI, AT4G) has been extensively studied in Arabidopsis thaliana because of its role creating flowering time diversity. The FRI protein regulates flowering induction by binding partner proteins on its N‐terminus and C‐terminus domains and creating a supercomplex that promotes transcription of the floral repressor FLOWERING LOCUS C (FLC). Genetic analysis of mutagen-induced flowering time variation in Arabidopsis thaliana (L.) Heynh. By H.A.S. Hussein. could be successfully identified with the experimental and analytical procedures used for this analysis of the flowering time mutants led to the following conclusions: 1. genetic variation,

Abstract. Analysis of genes controlling flowering time (heading date) contributes to our understanding of fundamental principles of plant development and is of practical importance because of the effects of flowering time on plant adaptation and crop ://   Although many genes are known to regulate flowering time (reviewed in Ref. 76), the vernalization requirement of different Arabidopsis accessions segregates as a single genetic

To investigate the genetic mechanisms controlling flowering time in tomato and related species, we performed a quantitative trait locus (QTL) analysis for flowering time in an F2 mapping   Hd3a shows a high level of similarity to Arabidopsis FT (flowering time) and functions as a flowering inducer. Early heading date 1 (Ehd1) is involved in promotion under SD conditions and encodes a B-type response regulator. Hd5 is involved in inhibition under LD conditions and encodes a putative subunit of a CCAAT-box-binding ://


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Genetic analysis of flowering time in arabidopsis by Jonathan H. Clarke Download PDF EPUB FB2

Variation in flowering time and number of rosette leaves. Flowering time is a character which often shows continuous variation. There are two ways to approach the genetic system of flowering time: 1. analysis of natural variation, and 2. analysis of artificial, that is mutagen-induced variation.

When crossing natural varieties of Arabidopsis A genetic and molecular analysis of flowering time in Arabidopsis thaliana using natural variation Een genetische en moleculaire analyse van bloeitijd in Arabidopsis thaliana gebruikmakend van natuurlijke variatie Proefschrift ter verkrijging van de graad van doctor op gezag van de rector magnificus van Wageningen Universiteit,   Genetic and physiological analysis of flowering time in the C24 line of Arabidopsis thaliana.

Sherrie L. Sanda and Richard M. Amasino* Department of Biochemistry, University of Wisconsin-Madison, Madison, WI *To whom correspondence should be addressed at Henry Mall University of Wisconsin Madison, WI Telephone: Also, genetic analysis of Arabidopsis varieties showing natural variation in flowering time has demonstrated how the activity of these pathways can be altered in nature and how balancing the effects of different environmental stimuli on flowering time is important in plants adapting to growth in different geographical   The onset of flowering is an important adaptive trait in plants.

The small ephemeral species Arabidopsis thaliana grows under a wide range of temperature and day-length conditions across much of the Northern hemisphere, and a number of flowering-time loci that vary between different accessions have been identified before.

However, only few studies have addressed the species-wide genetic Three genetic pathways promote flowering of Arabidopsis under long photoperiods. These pathways are represented by the genes CO, FCA, and GA1, which act in the long-day, autonomous, and gibberellin pathways, respectively. To test whether these are the only pathways that promote flowering under long photoperiods, the co-2 fca-1 ga triple mutant was Genetic Analysis to Test FRI Function in the Early Flowering Accessions.

To begin to assess whether FRI was functional in Cvi, Shakhdara, Kz-9, Kondara, and Wil-2, the flowering time of F 1 seedlings from crosses of the accessions to different backgrounds was determined.

This provides a preliminary indication of the activity of the different alleles; however, a definitive conclusion on allele Figure 1. Arabidopsis flowering time. (A) TwoArabidopsis plants, sown at the same plant on the left is already flowering, whereas the plant on the right is delayed because it carries active FRI.(B) An electron micrograph of an extremely early flowering transgenic plant overexpressing the floral pathway integrators FT and LFY.(C) The consequence of loss of floral meristem identity JA Delays Flowering Time through Repressing FT Expression.

The finding that JA delays flowering suggests a paradigm in which plants are able integrate the effect of the COI1-dependent signaling pathway into the internal flowering genetic network.

Considering that FT is a central node of floral integration and that many external inputs are channeled into the transcriptional regulation of FT to GENETIC and molecular studies in Arabidopsis have shown that flowering results from the action of several interdependent regulatory mechanisms or pathways, each mediating the effect of separate endogenous or environmental influences (K oornneef et al.

b; S impson and D ean ).The Arabidopsis FLOWERING LOCUS C (FLC) MADS-domain protein is a key flowering-time regulator   Integration of previous Mendelian genetic analyses and recent molecular genomics approaches, such as linkage mapping and QTL cloning, dramatically strengthened our current understanding of genetic control of rice flowering time.

Flowering time is one of the most important agronomic traits for seed production in rice (Oryza sativa L.). Abstract.

Here, we report an empirical study of the polygenic basis underlying the evolution of complex traits. Flowering time variation measured at 10 and 16°C in the 1,genomes Arabidopsis thaliana collection of natural accessions were used as a model.

The polygenic architecture of flowering time was defined as the 48 loci that were significantly associated with flowering time—at 10 Early flowering is an important trait influencing grain yield and quality in wheat (Triticum aestivum L.) and barley (Hordeum vulgare L.) in short-season cropping regions.

However, due to large and complex genomes of these species, direct identification of flowering genes and their molecular characterization remain challenging. Here, we used a bioinformatic approach to predict   Onset of flowering is controlled by environmental signals such as light and temperature.

Molecular-genetic studies in Arabidopsis thaliana have focused on The genetic basis of floral induction has been analysed by using flowering time mutants of Arabidopsis thaliana. Several mutants have been identified that are impaired in flowering time control.

However, genes with a subtle or redundant function for floral induction can't be identified by mutational ://?type=publication&id= In Arabidopsis, flowering time is controlled by several flowering‐promoting pathways, including vernalization, autonomous, photoperiod and gibberellin pathways (Henderson and Dean, ).

FLOWERING LOCUS C (FLC), encoding a MADS box domain transcription factor, functions as a key repressor gene in :// Human height may have a similar genetic architecture, but in the case of flowering time, these architectures are distinct from Arabidopsis and rice, self-fertilizing plant species, where flowering-time variation is controlled by fewer genes with larger effects, epistasis, and environmental interactions (9, 11, 13, 23).

This suggests that the   Also, genetic analysis of Arabidopsis varieties showing natural variation in flowering time has demonstrated how the activity of these pathways can be altered in nature and how balancing the effects of different environmental stimuli on flowering time is important ?id=PeriodicalPaper.

Proper timing of flowering is a major developmental decision in the life history of plants, and the genetic manipulation of flowering time has played a crucial role in the domestication and spread of cereal crops such as wheat (Triticum spp.), barley (Hordeum vulgare L.), rice (Oryza sativa), and maize (Zea mays; Greenup et al., ; Hung et al., ) A genetic and molecular analysis of flowering time in Arabidopsis thaliana using natural variation = Een genetische en moleculaire analyse van bloeitijd in Arabidopsis thaliana gebruikmakend van natuurlijke variatie.

A QTL for flowering time in Arabidopsis reveals a novel allele of ://. Genetic analysis showed that MED25 acts downstream of SPL10 to execute SPLregulated floral transition. Furthermore, SPL10 was required for MED25 association with the promoters of two target genes, FUL and LFY.

We provide evidence that SPL10 recruits MED25 to the promoters of target genes to regulate flowering ://p/> Arabidopsis thaliana (L.) HEYNH. was chosen as a model plant to study the genetic system of flowering time (start of flowering) and, often closely correlated to it, number of rosette leaves FRIGIDA (FRI) and FLOWERING LOCUS C (FLC) are two genes that, unless plants are vernalized, greatly delay flowering time in Arabidopsis thaliana.

Natural loss-of-function mutations in FRI cause the early flowering growth habits of many A. thaliana accessions. To quantify the variation among wild accessions due to FRI, and to identify additional genetic loci in wild accessions that