Consulta: subjectFacets:"Plant Breeding"
Registros recuperados: 4
Data/hora: 09/06/2024 01:56:46

R&amp;D Appropriability and Planned Obsolescence: Empirical Evidence from Wheat Breeding in the UK (1960-1995)
Provedor de dados: 31
Autores: Rangnekar,   Dwijen.
Plant breeders face a unique appropriation problem - plants are reproducible, genetic information is heritable and seeds can be multiplied. The paper uses indicators of varietal age as a proxy for durability to examine strategies of planned obsolescence. Using wheat breeding in the UK, evidence of strategies of planned obsolescence is confirmed. This is then corroborated with evidence of tendencies towards increased proliferation of varieties on the market and breeding strategies that focus on incremental productivity improvements (i.e. increased efficiency) and narrow and limited disease resistance (i.e. reduced durability).
Tipo: Conference Paper or Presentation
Palavras-chave: Planned Obsolescence; R&amp;D appropriability; Innovation; Plant Breeding; Crop Production/Industries; L13; O31; Q10.
Ano: 2002
URL: http://purl.umn.edu/24904

ADOPTION OF MAIZE AND WHEAT TECHNOLOGIES IN EASTERN AFRICA: A SYNTHESIS OF THE FINDINGS OF 22 CASE STUDIES
Provedor de dados: 31
Autores: Doss,   Cheryl R.; Mwangi,   Wilfred; Verkuijl,   Hugo; De Groote,   Hugo.
This paper synthesizes the findings of 22 micro-level studies on technology adoption carried out by the International Maize and Wheat Improvement Center (CIMMYT) with national agricultural research systems in Ethiopia, Kenya, Tanzania, and Uganda from 1996-1999. The authors found that technology adoption is taking place across Eastern Africa but considerable scope remains to improve the productivity of smallholder agriculture in higher potential regions with high levels of adoption. Extension was the variable most highly correlated with technology adoption, and extension services continue to play an important role in disseminating information on new varieties and how to manage them. Despite the usefulness of the micro-study results, especially for priority...
Tipo: Working or Discussion Paper
Palavras-chave: Maize; Wheat; Innovation adoption; Technology transfer; Plant Breeding; Small farms; Case studies; Fertilizers; Private sector; Nongovernmental organizations; Research institutions; International organizations; Kenya; Tanzania; Uganda; Farm Management.
Ano: 2003
URL: http://purl.umn.edu/46522

Recurrent mass selection for upright plant architecture in common bean
Provedor de dados: 63
Autores: Pires,Luiz Paulo Miranda; Ramalho,Magno Antonio Patto; Abreu,Ângela de Fátima Barbosa; Ferreira,Monica Christina.
Plant with a more upright architecture offers many advantages to farmers. Recurrent mass selection (RS) programs for carioca type common bean have been implemented for the purpose of obtaining new lines that will generate the high yields that are associated with upright plant archi tecture. This study aimed to assess the efficiency of recurrent mass selection (RS) for upright plant architecture in common bean (Phaseolus vulgaris) and the effect of RS on grain yield and to verify whether or not there is still variability in the population that favors continuing selection programs, using information obtained from progenies evaluated in cycle five (CV) and cycle eight (CVIII) of the RS program. Mass selection for more upright plants was performed visually in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Plant Breeding; Genetic progress; Genetic variability.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162014000300009

Genetic effects for controlling stripe rust (Puccinia striiformis f. sp. tritici) resistance in wheat through joint segregation analysis
Provedor de dados: 1
Autores: Ullah, Kalim; Khan, Naqib Ullah; Gul, Rozina; Gul, Samrin; Khan, Mohammad Irfaq; Khan, Imdad Ullah.
Mixed inheritance analysis using joint segregation analysis (JSA) for stripe rust (Puccinia striiformis f. sp. tritici) resistance was carried out in six basic populations (P1, F1, P2, BC1, BC2 and F2) of four wheat crosses (Hashim-08 × LU-26, Farid-06 × Shafaq, Parula × Blue Silver, TD-1 × D-97603) during crop season 2009 to 2012. Genes controlling stripe rust resistance were assessed by using area under disease progress curve (AUDPC). The AUDPC was controlled by mixed two additive-dominant-epistatic major genes plus additive-dominant-epistasis of polygenes in cross Hashim-08 × LU-26 (model E), while in Farid-06 × Shafaq, it was controlled by mixed two major additive-dominant genes plus additive-dominant polygenes (model E-2). In cross Parula × Blue...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Quantitative Genetics; Wheat Breeding; Disease resistance area under disease progress curve (AUDPC); Major gene and polygene inheritance; Segregating populations; Stripe rust (Puccinia striiformis f. sp. tritici); Triticum aestivum L. Genetics; Plant Breeding; Genotypic disease resistance.
Ano: 2016
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/28347