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
Filter
  • dry bean  (2)
  • Centers of domestication  (1)
  • Gene pyramiding  (1)
  • 1
    Digitale Medien
    Digitale Medien
    Yield stability of determinate and indeterminate dry bean cultivars (1987)
    Springer
    Theoretical and applied genetics 74 (1987), S. 516-521 
    Details
    ISSN: 1432-2242
    Schlagwort(e): Phaseolus vulgaris L. ; Gene pool ; Growth habit ; Centers of domestication ; Architype
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary Yield stability of determinate and indeterminate dry bean (Phaseolus vulgaris L.) cultivars was compared using regression of genotypic performance on environmental means. Yields of 28 dry bean cultivars differing in plant growth habit and commercial class designation were obtained from 42 Michigan performance nurseries over the 6 year period 1980 to 1985. The determinate type I large-seeded kidney and cranberry bean cultivars had below-average seed yield and large mean square deviations from regression. Lower yielding determinate small-seeded navy cultivars had low deviation mean square values, while higher yielding determinate navy cultivars had correspondingly higher mean square deviations from regression. Although seed yield of cultivars with an indeterminate growth habit was greater than determinate cultivars, prostrate type III indeterminate cultivars had deviation mean square values equivalent to those of large-seeded determinate cultivars. The erect, short vine type II indeterminate cultivars (architypes) had greater than average seed yields and minimum deviations from regression. Compared with other plant types, the architype group showed a greater yield response to more productive environments, with regression coefficient values significantly greater than unity. These results indicate that the type II growth habit offers the breeder the best opportunity of obtaining greater seed yield without incurring loss of yield stability as occurs with the type I and type III growth habits. Since the dry bean cultivars utilized in this study represent two distinct centers of domestication, the regression analysis suggests that cultivars from the predominant genetic center demonstrate more yield stability. A non-significant rank correlation coefficient between the combined and separate analyses for deviation mean square values of large-seeded cultivars implies that commercial dry bean classes should be compared separately based on center of domestication.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00289831
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 2
    Digitale Medien
    Digitale Medien
    Identification and potential use of a molecular marker for rust resistance in common bean (1993)
    Springer
    Theoretical and applied genetics 85 (1993), S. 745-749 
    Details
    ISSN: 1432-2242
    Schlagwort(e): Polymerase chain reaction ; Random amplified polymorphic DNA (RAPD) ; Phaseolus vulgaris ; Uromyces appendiculatus ; Gene pyramiding
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary The Up 2 gene of common bean (Phaseolus Vulgaris L.) is an important source of dominant genetic resistance to the bean rust pathogen [Uromyces appendiculatus (Pers. ex Pers.) Unger var ‘appendiculatus’ [syn U. Phaseoli (Reben) Wint.]. Up 2 in combination with other rust resistance genes may be used to obtain potentially stable genetic resistance. It is difficult, however, to combine rust resistance genes effective against a single race due to epistatic interactions that frequently occur between them. A strategy that employed bulked DNA samples formed separately from the DNA of three BC6F2 individuals with Up 2 and three without Up 2 as contrasting near-isogenic lines (NILs) was used to identify random amplified polymorphic DNA fragments (RAPDs) tightly linked to the Up 2 locus. Only 1 of 931 fragments amplified by 167 10-mer primers of arbitrary sequence in the polymerase chain reaction (PCR) was polymorphic. The RAPD marker (OA141100) amplified by the 5′-TCTGTGCTGG-3′ primer was repeatable and its presence and absence easy to score. No recombination was observed between OA141100 and the dominant Up 2 allele within a segregating BC6F2 population of 84 individuals. This result suggests that OA141100 and Up 2 are tightly linked. Andean and Mesoamerican bean germ plasm, with and without the Up 2 allele, were assayed for the presence of OA141100. Apparently, the marker is of Andean origin because all Andean lines, with or without the Up 2 allele, contained the marker, and the marker was absent in all Mesoamerican germ plasm except the lines to which Up-2 had been purposely transferred. These results suggest that OA141100 will be most useful for pyramiding Up 2 with other rust resistance genes into germ plasm of Mesoamerican origin where the marker does not traditionally exist. The use of bulked DNA samples may have concentrated resources toward the identification of RAPDs that were tightly linked to the target locus. Marker-based selection may provide an alternative to the time-consuming testcrosses required to pyramid bean rust resistance genes that exhibit epistasis.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00225014
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 3
    Digitale Medien
    Digitale Medien
    Phenotypic recurrent selection in ideotype breeding of pinto beans (1987)
    Springer
    Euphytica 36 (1987), S. 69-80 
    Details
    ISSN: 1573-5060
    Schlagwort(e): Phaseolus vulgaris ; dry bean ; common bean ; recurrent selection ; ideotype ; architype ; plant architecture ; linkage ; seed size ; growth habit ; plant type
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Summary Plant growth habit (type) plays a major determining role in the acceptance of a dry bean cultivar by commercial growers. Under the threat of wet fall conditions in the midwestern U.S., growers show a preference for upright plant types-I and II over the more prostrate type-III growth habit of commercial pinto cultivars. The prostrate habit creates considerably more risk of harvest losses and potential of white mold (Sclerotinia sclerotiorum) development during a wet growing season. The breeding strategy being utilized to develop better adapted pinto bean cultivars for the humid midwest is based on the concept of ideotype breeding which has been successfully applied to small seeded navy and black beans. A system of phenotypic recurrent selection using S1 selection is being followed in order to recombine desirable traits from two diverse germplasm pools. One germplasm pool possesses the desirable architectural plant form and disease resistance traits of the small-seeded types while the medium-seeded germplasm source possesses the desirable seed size, shape and color characteristics of the pinto class. Since a repulsion phase linkage appears to exist between type-II architecture (architype) and medium seed size (40 g/100 seeds), recurrent selection is shown to be the most effective procedure for breaking up undesirable linkage groups and for increasing the frequency of desirable genes, thus enhancing the chance for the desirable genetic recombinations to occur.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00730649
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 4
    Digitale Medien
    Digitale Medien
    Allozyme evaluation of upright common bean genotypes (1993)
    Springer
    Euphytica 67 (1993), S. 65-70 
    Details
    ISSN: 1573-5060
    Schlagwort(e): architype ; diaphorase ; dry bean ; ideotype ; isozyme ; Phaseolus vulgaris L.
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Summary In common bean (Phaseolus vulgaris L.) the diaphorase (DIA) allozyme variant Diap-2 105 is frequently present in plants with upright, type II plant architecture. The genetic relationship between upright plant architecture and Diap-2 105 was investigated in eight F2 populations derived from crosses between navy bean and pinto bean parental lines differing for type I, II, and III growth habit and DIA genotype. Segregation at the Diap-2 locus followed the expected 1:2:1 ratio in all eight F2 populations and when pooled across F2 populations. F2 data from 1345 individuals indicated that plant architecture and the Diap-2 locus are not linked (r=0.03, P=0.333). However, the Diap-2 105 allozyme was present in 71% of advanced navy, pinto, and great northern genotypes with type II plant architecture. Due to random drift, Diap-2 105, initially associated with type II architecture through founder effect, may be maintained in such genotypes without providing greater fitness or without being associated with a locus or linked loci governing upright plant architecture.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00022726
    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...