Bibliothek

X
feed icon rss

Ihre E-Mail wurde erfolgreich gesendet. Bitte prüfen Sie Ihren Maileingang.

Leider ist ein Fehler beim E-Mail-Versand aufgetreten. Bitte versuchen Sie es erneut.

Vorgang fortführen?

Exportieren
  • 1
    Digitale Medien
    Digitale Medien
    Pollen Characteristics and Genetics of Induced and Spontaneous Genetic Male-Sterile Mutants in Rice (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Plant breeding 109 (1992), S. 0 
    Details
    ISSN: 1439-0523
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Pollen characteristics, inheritance and allelism of 23 genetic male-sterile (ms) mutants of rice (Oryza sativa L.) were investigated. Ten of the mutants were induced by ethyl methane sulfonate, one induced by ethyleneimine, seven induced by gamma rays, one induced by streptomycin, one derived from tissue culture and three were spontaneous mutants found in the field. Four pollen abortion types were observed among these ms mutants: 3 no-pollen (NP) type, 6 complete pollen abortion (CPA) type, 13 partial pollen abortion (PPA) type, and 1 stainable pollen abortion (SPA) type. Progeny tests over two years indicated that each of the mutants was inherited as a monogenic recessive. A partial diallel cross among the 23 ms mutants indicated that mutant E2 was allelic to G4, E5 was allelic to E9, N2 was allelic to N3, and that three other mutants, E3, G6 and T1, shared the same ms locus. Gene symbols ms-46 (t) through ms-63 (t) were assigned to these mutants.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1439-0523.1992.tb00159.x
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 2
    Digitale Medien
    Digitale Medien
    Geographic distribution and multilocus organization of isozyme variation of rice (Oryza sativa L.) (2000)
    Springer
    Theoretical and applied genetics 101 (2000), S. 379-387 
    Details
    ISSN: 1432-2242
    Schlagwort(e): Key words Rice ; Isozyme variation ; Multilocus organization ; Evolution
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract  Genetic organization of isozyme variation in rice (Oryza sativa L.) was investigated based on 17 polymorphic isozyme loci using a sample of 511 accessions of worldwide origin. The genetic diversity within the species was very high (H=0.36 with 4.82 alleles per locus), as compared with most selfing plant species. Three diversity centers were detected for isozyme variation including South Asia, China and Southeast Asia. The accessions were classified into three well-differentiated cultivar groups corresponding to the indica and japonica subspecies, and a new unnamed group. Variation within the cultivar groups accounted for 80% of the total isozyme variation. Within-country variation accounted for 58% of the total variation while among-region and among-country variation within the cultivar groups accounted for only 14% and 8% of the total variation. Analyses using log-linear models revealed that pronounced non-random associations between and among alleles at many unlinked isozyme loci were organized in a non-hierarchical pattern, and subspecific and macro-geographic differentiation was much more pronounced in multilocus phenotype frequencies than in allelic frequencies at individual loci. These results suggest that selection on multilocus gene complexes was largely responsible for the maintenance of the extensive isozyme variation within the species and the indica-japonica differentiation. Our results further suggest the independent domestication of indica and japonica, the dual origins of the indica rice from China and South Asia (India), and the differentiation of the ecotypes ’javanica’ and the ’temperate japonica’ within the japonica subspecies.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s001220051494
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 3
    Digitale Medien
    Digitale Medien
    On the use of genetic male sterility in screening for cytoplasmic-genetic sterility in barley (1967)
    Springer
    Euphytica 16 (1967), S. 350-353 
    Details
    ISSN: 1573-5060
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Abstract A method is outlined for using genetic male sterility to screen for cytoplasmic-genetic sterility in barley. Since the method utilizes genetic male sterile plants as females, a very large number of crosses can be made. The critical cytoplasmic-genetic interaction will occur in the F1 generation, further minimizing time and effort required in the screening process. The method was put to test with materials from a breeding program. The desired cytoplasmic-genetic interaction was not observed. Since only ten male stocks were tested, it is suggested that further studies with stocks of more diverse origin might prove successful. {fx350-1}
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00028941
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 4
    Digitale Medien
    Digitale Medien
    Genetic and environmental variation in protein content of rice (Oryza sativa L.) (1973)
    Springer
    Euphytica 22 (1973), S. 264-273 
    Details
    ISSN: 1573-5060
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Summary The inheritance of protein content in rice was studied in the six possible hybrid populations among four varieties: Calrose from the USA, Ku Jung Do from Korea, and Kitaminori and Isao Mochi from Japan. Each population consisted of 100 random lines. Standard unit heritabilities for the correlation of F2 panicle values with F3 hill-plot protein values were not significantly different from zero, and variance component heritabilities for F3 hill-plots were low. Among the F3 populations significant genetic variation for protein content was observed in the crosses of Ku Jung Do × Calrose, and Kitaminori × Calrose. Genotypic, phenotypic, and environmental estimates of correlations among protein content, kernel weight, heading date, and plant height were examined. High protein content was significantly correlated with light kernels, early heading, and short stature. Low protein heritabilities were tentatively attributed to genotype × year interaction, to an environmental gradient affecting protein content in the field, and to within-line segregation for the early generations tested. It was suggested that selection for protein content be deferred until later generations. However, selection for high protein content may in some cases be incompatible with selection objectives for other traits.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00022634
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 5
    Digitale Medien
    Digitale Medien
    Yield of F1, F2 and F3 hybrids of rice (Oryza sativa L.) (1976)
    Springer
    Euphytica 25 (1976), S. 587-595 
    Details
    ISSN: 1573-5060
    Schlagwort(e): Oryza sativa ; rice ; yield ; yield components ; heterosis ; varietal hybrids
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Summary Yield and yield components of F1 hybrids were studied in three experiments at 30×30 cm spacings and in one experiment at 15×15 cm spacings. In the 30×30 cm experiments, 10 of the 41 hybrids tested significantly outyielded their high parents. However, only 2 hybrids significantly outyielded the best cultivar: one hybrid yielded 23 % and the other 16 % more than their respective check cultivars. The four hybrids in the 15×15 cm experiment yielded only 59 to 92% as much as their high parents. In areas where rice is transplanted at relatively wide spacings, the observed levels of F1 heterosis in selected hybrids may be sufficient to warrant production of hybrid rice, if enough hybrid seed can be produced. For direct-seeding at the high rates normal in the USA, the relatively small levels of heterosis and the difficulties of hybrid seed production preclude use of F1 hybrid rice cultivars at present. None of 19 bulk F2 and F3 hybrids in two experiments yielded significantly more than its high parent. Similarly, none of the 12 mixtures included in one experiment yielded significantly more than its high parent. On the basis of yield alone, using bulk F2 or F3 or simple mixture populations is not merited.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00041596
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 6
    Digitale Medien
    Digitale Medien
    Genetic analysis of male sterility in rice mutants with environmentally influenced levels of fertility (1991)
    Springer
    Euphytica 55 (1991), S. 179-186 
    Details
    ISSN: 1573-5060
    Schlagwort(e): chemical mutagenesis ; male sterility ; Oryza sativa ; pollen ; rice
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Summary Twenty-six male sterile plants grown in the field were recovered in the M7 generation from ethyl methane sulfonate-treated material of the rice cultivar M-201. Fertility increased five-fold when ratooned plants from the field were grown in a growth chamber with a 12 hour daylength. Crosses between mutant and normal fertile cultivars produced fertile F1 plants. Female fertility was normal as judged by percent seed set from unbagged panicles of parental and recombinant lines. Transgressive segregation for fertility was observed for all crosses in the F2 and F3 generations. Five of 37 F3 male sterile plants showed moderate levels of seed fertility under winter greenhouse conditions and reduced seed set when transplanted to summer field plots. Fertility data from reciprocal crosses suggested cytoplasmic factors had little or no effect on levels of male sterility in the mutant lines. Chi-squared analyses of F2 and F3 generation results indicated male sterility of the mutants is conditioned by two nuclear genes with epistatic effects.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00025231
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
Schließen ⊗
Diese Webseite nutzt Cookies und das Analyse-Tool Matomo. Weitere Informationen finden Sie hier...