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  • 1
    Electronic Resource
    Electronic Resource
    Photorefractive parameters and light-induced absorption in BaTiO3 (1995)
    Springer
    Applied physics 61 (1995), S. 553-557 
    Details
    ISSN: 1432-0630
    Keywords: 78.20 ; 61.72 ; 72.40. + w
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The light-induced absorption coefficient Δα and the light-intensity dependence of the photorefractive parameters known as the effective trap density NE, the mobility-recombination product μτr and the photoconductivity σph have been measured for four nominally pure BaTiO3 crystals. The qualitative correlation between Δα, NE, Δα,NE, (μτr)−1 and σph has been revealed. The results are explained by the two-center model of deep and shallow traps.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01540258
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Differentiation and classification of parental lines and favorable genic interactions affecting F1 fertility in distant crosses of rice (Oryza sativa L.) (1998)
    Springer
    Theoretical and applied genetics 96 (1998), S. 526-538 
    Details
    ISSN: 1432-2242
    Keywords: Key words Oryza sativa L. ; Genetic differentiation ; Classification of parental lines ; Restriction fragment length polymorphism (RFLP) ; Genic interaction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  This study was intended to investigate the extent of genetic differentiation in parental lines of rice hybrids and to analyze the genetic basis underlying the fertility phenomenon in distant crosses. Two subsets of rice material (111 entries in total) were used, including 81 doubled-haploid (DH) lines and 30 Indica and Japonica rice varieties or lines (as a control). The DH lines was derived from a heterotic Indica/Japonica cross (Gui630/02428) by anther culture. The materials in the control represent a broad spectrum of the Asian cultivated rice gene pool including landraces, primitive cultivars, historically important cultivars, modern elite cultivars, super rice and parents of superior hybrids. In accordance with the NC II design, 57 out of the DH lines were test-crossed to two important wide compatibility lines: photoperiod-sensitive genetic male sterile (PGMS) line N422s and thermo-sensitive genetic male sterile (TGMS) line Peiai64s. The F1s and their parents, 182 entries in total, were examined for the performance of seven traits in a replicated field trial. All the rice materials was surveyed for polymorphisms using 92 RFLP markers selected from two published molecular marker linkage maps. Genotypes of the F1 hybrids at the molecular-marker loci were deduced from the parental genotypes. The analysis showed that there were two types of genetic differentiation in the two subsets of rice material; that is, qualitative differentiation in the control and quantitative differentiation in the DH lines. In addition, favorable genic interactions (both intra- or inter-locus) contributed to better increase the fertility in hybrids of distant crosses through incorporation of a wide-compatibility line as the female parent. Favorable genic interactions can be applied in hybrid rice breeding programs by selecting parents with an appropriate extent of genetic differentiation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220050770
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    Paper (German National Licenses)
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