Plant viral vectors are superior tools for genetic manipulation, allowing rapid induction or suppression of expression of a target gene in plants. This is a particularly effective technology for use in breeding fruit trees, which are difficult to manipulate using recombinant DNA technologies. We reported previously that if apple seed embryos (cotyledons) are infected with an Apple latent spheri...

Pear psylla (Cacopsylla pyricola Foërster) is the most serious pest of the European pear (Pyrus communis L.) in the production regions of Europe and North America. Nine plant germplasm introductions of pear from Central Europe recently released from plant quarantine were evaluated for nymphal feeding antixenosis, a primary mode of resistance known to be correlated with ovipositional antixenosis...

Because most regions of Japan are in the temperate climate zone, many deciduous and evergreen fruit crops are cultivated in Japan. In addition to fruit cultivation in the temperate zone, some southern areas, such as the Ryukyu Islands that stretch from Kyushu to Taiwan, are at the northern limits for tropical fruit production without the need of artificial heating. At present, annual fruit prod...

conventional methods of pear breeding, largely based on intra- and inter-specific hybridization, are difficult because pear is highly heterozygous, polygenic and has a long juvenile period. genetic improvements of pear cultivars are possible through induction of mutations and gene transfer by genetic engineering. a general prerequisite for these approaches is to establish an efficient plant reg...

Pear (Pyrus spp.) is one of the most important edible fruits belonging to family Rosaceae. DNA markers, molecular genetics and genomics, breeding pear have greatly progressed over last few decades. The development reliable such as simple sequence repeats single nucleotide polymorphisms, has allowed profiling accessions, assessment genetic diversity within species, analyses phylogenetic relation...

Japanese pear (Pyrus pyrifolia) exhibits gametophytic self-incompatibility (GSI) controlled by a complex and multiallelic S locus. The pistil-part product of the S locus is the polymorphic ribonuclease, S-RNase. Information on S-genotypes is important for the production and breeding of Japanese pears. Molecular analyses of S-genotypes of Japanese pear have been conducted with the CAPS (cleaved ...

The article presents preliminary results of studies on the assessment VNIISPK breeding common quince use as an intensive type seedling rootstock for pear cultivation in conditions Central Russia. It was established that is suitable to be used Russian midland and has sufficient winter resistance overground root systems, high yield good compatibility with some varieties. Strong fusion active grow...

Abstract We analyzed the genome sequence of a Japanese pear (Pyrus pyrifolia) to facilitate its genetics and genomics as well breeding programs, in which variety 'Nijisseiki' with superior flesh texture has been used parent for most cultivars. De novo assembly long reads covered 136× generated 503.9 Mb contigs consisting 114 sequences an N50 value 7.6 Mb. Contigs were assigned genetic maps esta...