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elongated mesocotyl1, a phytochrome-deficient mutant of maize
No full textTo begin the functional dissection of light signal transduction pathways of maize (Zea mays), we have identified and characterized the light-sensing mutant elm1 (elongated mesocotyl1). Seedlings homozygous for elm1 are pale green, show pronounced elongation of the mesocotyl, and fail to de-etiolate under red or far-red light. Etiolated elm1 mutants contain no spectrally active phytochrome and do not deplete levels of phytochrome A after red-light treatment. High-performance liquid chromatography analyses show that elm1 mutants are unable to convert biliverdin IXalpha to 3Z-phytochromobilin, preventing synthesis of the phytochrome chromophore. Despite the impairment of the phytochrome photoreceptors, elm1 mutants can be grown to maturity in the field. Mature plants retain aspects of the seedling phenotype and flower earlier than wild-type plants under long days. Thus, the elm1 mutant of maize provides the first direct evidence for phytochrome-mediated modulation of flowering time in this agronomically important species
Conservación de recursos fitogenéticos: el caso del Banco de Germoplasma de Maíz de CIMMYT
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Empowering the effective use of genetic resources in breeding for stress tolerance: the CGIAR Genebanks and Breeding Programs lead the way with International Public Goods
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Thinking Globally, Acting Locally: CIMMYT's Global Collection of Maize in its Center of Origen and Diversity
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Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Case study: Confirming the identities of replicates in a field collection of the perennial grass genus, Tripsacum
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Banco de germoplasma de CIMMYT: promoviendo la conservación, uso y estudio de la diversidad
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The Article 15 Germplasm Banks and the Crop Trust: Partners in Safeguarding Global Goods
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