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  • MADS box genes  (2)
  • Pollen  (2)
  • 157-951A; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Joides Resolution; Leg157; Ocean Drilling Program; ODP; Sample code/label; South Atlantic Ocean; Uniform resource locator/link to image
  • Springer  (4)
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  • 1
    Digitale Medien
    Digitale Medien
    Male gametophytic selection in maize (1982)
    Springer
    Theoretical and applied genetics 63 (1982), S. 249-254 
    Details
    ISSN: 1432-2242
    Schlagwort(e): Maize ; Pollen ; Gametophytic selection ; Competitive ability
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary There is evidence that male gametophyte selection is a widespread phenomenon in higher plants. The pollen tube growth rate is one of the main components of gametophyte selective value; genetic variability for this trait, due to the effect of single genes or to quantitative variation, has been described in maize. However, indication of gametophytic selection has been indirectly obtained; its effect was revealed by the positive relation observed between gametophyte competitive ability and sporophyte metrical traits. This paper considers the results of selection applied to gametophyte populations produced from single plants. The competitive ability of the lines was evaluated in comparison with that of a standard line by means of the pollen mixture technique. Sporophytic traits were measured in the hybrid progeny obtained by crossing selected S3 and S4 families with an unrelated single cross and an inbred line. Gametophyte selection produced inbred lines with high gametophyte competitive ability. In view of the selection procedure adopted, this result was interpreted as an indication of haploid expression of genes involved in the control of pollen tube growth. Moreover, this gametophytic trait was positively correlated with sporophytic traits (seedling weight, kernel weight and root tip growth in vitro), indicating that both groups of characters have a common genetic basis.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00304004
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    A multi-nucleate male-sterile mutant of maize with gametophytic expression (1997)
    Springer
    Sexual plant reproduction 10 (1997), S. 22-26 
    Details
    ISSN: 1432-2145
    Schlagwort(e): Key words Maize ; Pollen ; Male sterility ; Gametophytic mutants
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract  In order to dissect the complex genetic system that controls pollen development, we have undertaken a program of transposon insertion mutagenesis, with the purpose of producing mutations in gametophytically acting genes that are important for this process. The present work reports the developmental cytology of one of the mutants isolated, gaMS-2 (gametophytic male sterile-2). A peculiar feature of the mutant grains was lack of differentiation between the vegetative and the generative nuclei, leading to alteration in number, conformation and placement of nuclei. At anthesis, the grains carrying the mutant allele are about 40% of the normal grain size, contain a very reduced amount of starch and exhibit various nuclear abnormalities.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s004970050063
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    MADS box genes expressed in developing inflorescences of rice and sorghum (1997)
    Springer
    Molecular genetics and genomics 253 (1997), S. 615-623 
    Details
    ISSN: 1617-4623
    Schlagwort(e): Key words Flower development ; MADS box genes ; Oryza sativa ; Sorghum bicolor ; Synteny
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract With the aim of elucidating the complex genetic system controlling flower morphogenesis in cereals, we have characterized two rice and two sorghum MADS box genes isolated from cDNA libraries made from developing inflorescences. The rice clones OsMADS24 and OsMADS45, which share high homology with the Arabidopsis AGL2 and AGL4 MADS box genes, are expressed in the floral meristem, in all the primordia, and in mature floral organs. High expression levels have also been found in developing kernels. The sorghum clone SbMADS1 is also homologous to AGL2 and AGL4: expression analysis and mapping data suggest that it is the ortholog of OsMADS24. The pattern of expression of SbMADS2, the other sorghum MADS box gene, suggests that it may play a role as a meristem identity gene, as does AP1 in Arabidopsis, to which it shows considerable homology. The four genes have been mapped on a rice RFLP genetic map: the results are discussed in terms of synteny among cereals.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s004380050364
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    CaMADS1, a MADS box gene expressed in the carpel of hazelnut (1998)
    Springer
    Plant molecular biology 38 (1998), S. 1147-1160 
    Details
    ISSN: 1573-5028
    Schlagwort(e): hazelnut ; Corylus avellana ; MADS box genes ; flower development ; ovule ; AGAMOUS
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Hazelnut (Corylus avellana L.) is a species of economic interest that shows a peculiar floral biology. Unlike most of the angiosperms, which produce ovules during floral development such that they are ready for pollen at anthesis, hazelnut ovary development is delayed and triggered by compatible pollination. In order to elucidate the mechanisms regulating this unusual process and the role of the MADS box genes in ovary development, a cDNA library from pollinated styles of hazelnut was screened with a mixture of MADS box genes from different plant species. CaMADS1 (Corylus avellana MADS box), a floral-specific MADS box gene, was isolated, and characterized as belonging to the sub-family of the AGAMOUS genes. Northern blot, RT-PCR analyses and in situ hybridization experiments show a precise correlation between ovary development and CaMADS1 expression, indicating a role of this MADS box gene in the processes of floral organogenesis.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1006022524708
    Standort Signatur Erwartet Verfügbarkeit
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