Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 11
    Electronic Resource
    Electronic Resource
    Competitive ability of maize pollen. Intergametophytic effects (1980)
    Springer
    Theoretical and applied genetics 57 (1980), S. 37-41 
    Details
    ISSN: 1432-2242
    Keywords: Maize pollen ; Competitive ability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Intergametophytic influences on pollen competitive ability were studied by means of the pollen mixture technique: mixtures of pollen from different genetic sources, marked for the presence of the normal or the mutant allele of the opaque-2 gene, were used to pollinate o2o2 female plants. The variation of relative frequency of one of the two kernel types from apex to base of the resulting ear, made it possible to measure the competitive ability by regression coefficients. The effect of the pollen marker on the character was estimated by analyzing the progeny of heterozygous o2/+ plants self-pollinated through four generations. The o2 allele-bearing pollen revealed a slower germination rate than the dominant counterpart; no differences between the two pollen types were observed with regard to tube growth rate. The occurrence of intergametophytic interactions was confirmed: the competitive ability of a line varied according to the genotype of the competing pollen. Thus, this component has to be taken into account in considering male gametophyte fertilization ability.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00276008
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 12
    Electronic Resource
    Electronic Resource
    Computerized scheme for the reaction of hemoglobin with ligands (1985)
    Springer
    The protein journal 4 (1985), S. 319-331 
    Details
    ISSN: 1573-4943
    Keywords: hemoglobin ; computer simulation ; finite-element approximation ; kinetic simulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A scheme for the reaction of hemoglobin with ligands is described, which postulates the functional heterogeneity of the chains, considers all possible combinations of the distribution of the ligand on the four chains of hemoglobin, and does not require simplifying assumptions about the hemoglobin reactivity. Ten tetrameric species are considered, together with 16 reactions between these species, each with an “on” and an “off” rate constant. The dissociation of hemoglobin tetramers into dimers is also considered, with four “on” and four “off” rate constants for the reactions between dimers, and ten equilibrium constants for the reactions between tetramers and dimers. Moreover, some side reactions, such as the “trapping” of ligands by a hemoglobin competitor, are included. A FORTRAN program, suitable for microcomputers, is described for handling this scheme, with some examples showing its advantages.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01025497
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...