Search Results

differentiation of P. trituberculatus , further molecular evidence is necessary to determine its population structure and genetic differentiation status to develop strategies for genetic improvement and resource conservation. The use of AFLPs as a molecular marker has proven to be very effective for the

In: Crustaceana

reduced by 90%. At each temperature IS-5 juveniles emerged 2-3 days earlier than HP88. Keywords: heat tolerance, genetic improvement, reproduction, heat shock. The entomopathogenic nematode-bacterium associations of Steinernema- Xenorhabdus and Heterorhabditis-Photorhabdus are promising agents

In: Nematologica
Author: Aaron Zelcer

Lycopersicon wild species are the most promising sources for genetic variability in tomato (L. esculentum) breeding programs. Although several nuclear traits originated in wild relatives have been introgressed into commercial cultivars, the potential germplasm resources are severely limited in many instances by unilateral incompatibility and hybrid sterility among these crosses. Therefore, somatic hybridization is emerging as a powerful technique for generation of novel combinations of nuclear and cytoplasmic genomes, previously unattainable by conventional breeding. The variability in Lycopersicon taxa (based on classical taxonomy criteria, or molecular analyses of cytoplasmic genomes) is reviewed, and the potential contribution of cybridization or asymmetric somatic hybridization between tomato and related species is discussed.

In: Israel Journal of Plant Sciences

Improvement of specific gravity through tree breeding was an early choice made in the mid 20th century due to its ease of measurement and impact on pulp yield and lumber strength and stiffness. This was often the first, and in many cases, the only wood quality trait selected for. However, from a product standpoint, increased specific gravity has shown to lower many paper strength and stiffness properties and has been assumed to be directly attributable to increased fiber coarseness. As a result, it is currently not clear which fiber trait would best benefit a tree improvement program for paper products. This review found coarseness to be perhaps more important to paper strength and stiffness whereas tracheid length showed better promise from a breeding point of view due to its independence from specific gravity. However, both traits possessed strong heritability and influence on product performance and thus both would be beneficial to breed for depending on organizational goals and end product mix. The objective of this paper is to review and prioritize coarseness and tracheid length from both an end use and raw material perspective. To aid in prioritization, the variation, correlation, and heritability of both traits were reviewed along with significant genetic and phenotypic correlations. Variation trends within and between families as well as within a tree were reviewed.

In: IAWA Journal

The variation of specific gravity, ring width, tracheid length and tracheid crosssectional dimensions was studied among the remote natural forests of Cupressus sempervirens var. horizontalis Gord. of the Greek islands Crete, Rhodes and Samos.

In: IAWA Journal
Author: Guangchu
All major crop plants have been subjected to genetic improvement, either by selection and propagation or by breeding. Bamboos have received scant attention from plant breeders despite their importance as crop plants due to their unpredictable and uncontrollable flowering habits and to a limited understanding of genetic variation amongst the existing species. The potential for new, improved bamboo hybrids is enormous. The demand for bamboo is increasing worldwide and the diversity of uses to which it is put is growing steadily. Increases in demand can be met by increasing the areas of bamboo plantations, but improvements in the quality of raw bamboo can only be met by selection and breeding.
Professor Zhang Guangchu of Guangdong Forestry Research Institute has worked on bamboo hybridization for almost thirty years and has amassed a wide range of skills and experience. She has produced hybrid bamboos that are now being grown commercially in South China. INBAR recently invited her to distil her experiences and make them available to a wider audience and this manual is the result. The manual refers primarily to the bamboos of southern China where the author is based, but the principles and techniques are applicable worldwide.
This manual is one of the products of INBARs Ecological Security programme, which aims to improve the genetic diversity, conservation and management of bamboo and rattan resources, and to promote their use in environmental protection and rehabilitation. It aims to be the catalyst for scientists, technicians, foresters, farmers and individuals to undertake bamboo hybridization in their own regions, to stimulate relevant research and to promote the wider acceptance and use of hybrid bamboos.

after combined mutagen action. Comptes Rendus de l'Academie d'Agriculture, Sofia, Bulgaria 7: 37-41. Mehandjiev, A., Noveva, P., Kosturkova, G. 1999. Induced mutations and their application in genetic improvement of pea. Pisum Genetics 31: 24-27. Montalvan, R., Akichiko, A. 1998. Effect

In: Israel Journal of Plant Sciences

fungal growth is not possible as too many DJ would be lost. The low values recorded for WA 10 for S. capocapsae , S. abbasi and S. arenarium provide indication that there is potential for genetic improvement by selection. Should these values be tolerated by >90% of the DJ population, achieved

In: Nematology

pharmacological characteristics, affording fast genetic improvement of biomass source for both phytomedicine manufacturing and bioactive compound extraction. In addition, cutting- and tissue culture-based clonal propagation of selected plants can afford higher resistance to diseases ( Faleiro et al. 2019

In: Israel Journal of Plant Sciences

The production of gametoclonal and somaclonal variants in tomato is of great importance for the genetic improvement of tomato hybrids and cultivars. The possibility to obtain tomato plants resistant to Clavibacter michiganense subsp. michiganense (Cmm) through anther and tissue culture was investigated in the present study. Regenerants from anther and tissue cultures and their progenies (R1-R3) in the cultivars Roma ms and Bella, lines L. 24–13, and L. 6944, as well as the hybrids Roma ms × UC 82A, Roma ms × L. 31, Roma ms × Bella, and Cristy, were tested for resistance to Cmm. The regenerants differed in their resistance to Cmm. All regenerants from the anther culture of the genotype Roma ms and Roma ms × UC 82A are susceptible to the disease, while those from Bella and Roma ms × L. 31 vary from susceptible to resistant. The highest number of regenerants obtained from somatic tissue culture lacking disease symptoms until the end of the vegetation was observed in the genotypes Cristy and L. 24–13. Variation in regenerant resistance is found in R1, Rb, and R3. The results suggest that the gametoclonal and somaclonal variation may be efficiently applied to obtain tomato plants resistant to Cmm.

In: Israel Journal of Plant Sciences