• Korean Journal of Breeding Science
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• v.40 no.4
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• pp.517-520
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• 2008

A new standard rose cultivar 'Pink holic' was bred from the cross between pink standard cultivar 'Lyvia' and red standard cultivar 'Sioux' at the National Horticulture Research Institute. The cross was made in 2002 and 'Pink holic' was finally selected in 2007 after investigating characteristics for three years from 2005 to 2007. 'Pink holic', a light pink standard cultivar grows vigorously and has powder mildew resistant. The major characteristics of this cultivar are $185.4stems/m^2/year$ in yield, 83.9cm in length of cut flower, 11.0cm in flower diameter, 42.9 in petal number, and 22.4 days in vase life. This cultivar can be propagated by both cutting and grafting. The consumer's preference of this cultivar is relatively higher than that of control cultivar, 'Moon light'.

• Korean Journal of Breeding Science
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• v.40 no.4
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• pp.435-438
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• 2008

A new spray rose cultivar 'Morning Shine' was bred from the cross between light pink spray cultivar 'Charming' and white spray cultivar 'Princess' at the National Horticulture Research Institute. The cross was made in 2000 and 'Morning Shine' was finally selected in 2006 after investigating characteristics for three years from 2003 to 2006. 'Morning Shine', a light yellow spray cultivar grows vigorously and has high productivity. The major characteristics of this cultivar are $159.7 stems/m^2/year$ in yield, 74.3 cm in length of cut flower, 7.2 cm in flower diameter, 35.6 in petal number, and 13.0 days in vase life. This cultivar can be propagated by both cutting and grafting. The consumer's preference of this cultivar is relatively higher than that of control cultivar, 'Sunny Lady'.

• Korean Journal of Breeding Science
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• v.43 no.6
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• pp.564-567
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• 2011

A new standard rose cultivar 'Pink Bell' was bred from a cross between pink standard cultivar 'Sweet Pink' and pink standard cultivar '"Pink Pearl' at the National Institute of Horticultural & Herbal Science. A cross was made in 2003 and 'Pink Bell' was finally selected in 2008 after investigating its characteristics for three years from 2006 to 2008 (UPOV standards). 'Pink Bell', a pink color standard cultivar grows vigorously and has a high yield. The major characteristics of this cultivar are $162stems/m^2/year$ in yield, 69.8 cm in length of cut flower, 10.4 cm in flower diameter, 44.5 in petal number per stem, and 12.0 days in vase life. This cultivar can be propagated by both cutting and grafting. The consumer's preference of this cultivar was relatively higher than that of control cultivar, 'Nobless'.

• Korean Journal of Breeding Science
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• v.42 no.3
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• pp.284-287
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• 2010

A new standard rose cv. 'Honey Lemon' was bred by the cross between white standard cv. 'Escimo' and light pink standard cv. 'Medeo' at the National Institute of Horticultural Research Institute. The cross was made in 1999 and 'Honey Lemon' was finally selected in 2003 after investigating characteristics for three years from 2001 to 2003. 'Honey Lemon', a white standard cultivar grows vigorously and has good flower shape. The major characteristics of this cultivar are $248.0stems/m^2/year$ in yield, 53.0 cm in length of cut flower, 8.0 cm in flower diameter, 17.0 in petal number, and 16.9 days in vase life. This cultivar can be propagated by both cutting and grafting. The consumer's preference of this cultivar is relatively higher than that of control cv., 'Tineke'. (Registration number: 1151).

• Korean Journal of Breeding Science
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• v.42 no.6
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• pp.623-626
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• 2010

A new standard rose cultivar 'White Day' was bred from the cross between white standard cultivar 'Athena' and white standard cultivar 'Tineke'at the National Institute of Horticultural and Herbal Science. The cross was made in 1998 and 'White Day'was finally selected in 2002 after investigating its characteristics for three years from 2000 to 2002 (UPOV standards). 'White Day', a white standard cultivar grows vigorously and has good flower shape. The major characteristics of this cultivar are 106.3 stems/$m^2$/year in yield, 68.6 cm in length of cut flower, 14.3 cm in flower diameter, 93.5 in petal number per stem, and 13.4 days in vase life. This cultivar can be propagated by both cutting and grafting. The consumer's preference of this cultivar is relatively higher than that of control cultivar, 'Tineke'.

• Asian-Australasian Journal of Animal Sciences
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• v.17 no.10
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• pp.1350-1353
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• 2004

To further investigate the regions on porcine chromosome 7 that are responsible for economically important traits, phenotypic data from a total of 287 F2 individuals were collected and analyzed from 1998 to 2000. All animals were genotyped for eight microsatellite loci spanning the length of chromosome 7. QTL analysis was performed using interval mapping under the line-cross model. A permutation test was used to establish significance levels associated with QTL effects. Observed QTL effects were (chromosomewide significance, position of maximum significance in centimorgans): Birth weight (<0.01, 3); Carcass length (<0.05, 80); Longissimus muscle area (<0.01, 69); Skin percentage (<0.01, 69); Bone percentage (<0.01, 74); Fat depths at shoulder (<0.05, 54);Mean fat depth (<0.05, 81); Moisture in m. Longissimus Dorsi (<0.05, 88). Additional evidence was also found which suggested QTL for dressing percentage and fat depths at buttock. This study offers confirmation of several QTL affecting growth and carcass traits on SSC7 and provides an important step in the search for the actual major genes involved in the traits of economic interest.

• Korean Journal of Breeding Science
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• v.42 no.1
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• pp.100-108
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• 2010

This study was carried out to confirm the chromosome constitution and homoeologous recombination of progenies derived from various cross combination using tetraploid OA interspecific hybrid originated from mitotic chromosome doubling. Based on the chromosome analysis of progenies crossed reciprocally, there were only triploid progenies when crossed with diploid Asiatics as male or female parent. While only tetraploid progenies were produced when crossed tetraploid Asiatics or tetraploid OA hybrid with tetraploid OA hybrid, respectively. However, two types of progenies, that is, diploid and triploid plants, were produced from cross combinations between diploid Oriental hybrid and tetraploid OA hybrid. From the GISH analysis of OA hybrid, it was confirmed that diploid $F_1$ OA hybrid was consisted of 24 chromosomes (12 Oriental and 12 Asiatics) showing authentic OA hybrid. On the other hand, it was notified that triploid plants (3x=36) were consisted of 24 Asiatics lily chromosomes and 12 Oriental lily chromosomes by analysis of backcross progenies derived from either $A{\times}OA$ or $OA{\times}A$ crosses. In cross between tetraploid OA and OA, all the progenies were tetraploid with equal number of chromosomes without any homoeologous recombination, i.e. each 24 chromosomes of Oriental and Asiatics. In 2x-4x ($O{\times}OA$) cross combination, some progenies had 2x=24 chromosomes originated from only Oriental hybrid, and other progenies had 3x=36 chromosomes derived from 24 chromosomes of Oriental hybrid and 12 chromosomes of Asiatic hybrid. Only tetraploid Asiatics chromosomes without any Oriental one were produced in all the progenies from 4x-4x ($AA{\times}OA$) cross combination.

• Nuclear Engineering and Technology
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• v.54 no.3
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• pp.959-964
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• 2022

Lead is an important material, both for fusion or fission reactors. The cross sections of natural lead should be validated because lead is a main component of lithium-lead modules suggested for fusion power plants and it directly affects the crucial variable, tritium breeding ratio. The presented study discusses a validation of the lead transport libraries by dint of the activation of carefully selected activation samples. The high emission standard ²⁵²Cf neutron source was used as a neutron source for the presented validation experiment. In the irradiation setup, the samples were placed behind 5 and 10 cm of the lead material. Samples were measured using a gamma spectrometry to infer the reaction rate and compared with MCNP6 calculations using ENDF/B-VIII.0 lead cross sections. The experiment used validated IRDFF-II dosimetric reactions to validate lead cross sections, namely ¹⁹⁷Au(n, 2n)¹⁹⁶Au, ⁵⁸Ni(n,p)⁵⁸Co, ⁹³Nb(n, 2n)^92mNb, ¹¹⁵In(n,n')^115mIn, ¹¹⁵In(n,γ)^116mIn, ¹⁹⁷Au(n,γ)¹⁹⁸Au and ⁶³Cu(n,γ)⁶⁴Cu reactions. The threshold reactions agree reasonably with calculations; however, the experimental data suggests a higher thermal neutron flux behind lead bricks. The paper also suggests ²⁵²Cf isotropic source as a valuable tool for validation of some cross-sections important for fusion applications, i.e. reactions on structural materials, e.g. Cu, Pb, etc.

• Journal of Forest and Environmental Science
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• v.40 no.3
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• pp.259-264
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• 2024

Dalbergia sissoo and Dalbergia latifolia are the two most important timber wood species that are indigenous to the Indo-Pak subcontinent producing very high-quality timber. Its wood is used to produce high-quality furniture. Due to overexploitation and dieback disease, their production is seriously hampered and threatens their genetic diversity. Several ecotypes are tolerant to dieback thus offering an opportunity to develop a superior hybrid for the establishment of plantations for hybrid seed production. Hybrid evaluation can only be done by using DNA markers such as SSR markers. Cross-specific amplification of SSR markers is a cost-effective way of producing DNA markers for species lacking genetic information. Here, we report for the first-time successful cross-amplification of SSR markers in Dalbergia latifolia and added new SSR markers in D. sissoo. Cross-species amplification resulted in 13 successful SSR markers in D. latifolia and an addition of 14 markers in D. sissoo of expected sizes. Six SSR markers were further selected randomly to validate the breeding behavior of both species. A diverse DNA profile of seed progenies matched to different pollen donors deviated from the same mother suggested cross-pollination is the most likely mechanism of seed production in D. sissoo and D. latifolia. However, the results must be validated by using a large sample size and through controlled pollinations. SSR markers thus developed will be useful in the conservation and development of superior hybrids for sustainable development and production of commercial populations in Dalbergia sissoo and D. latifolia.

• Plant Resources
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• v.4 no.3
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• pp.157-160
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• 2001

The wild Pyrus plants belong to the deciduous woody plants in Rosaceae family. Most are cultivated for fruit productions, but some for ornamental plants. There are 5 Pyrus species including Pyrus ussuriensis and 8 varieties cultivated in Korea. In Korea, these plants are populated near villages or on the hills, and they are easily propagated since their fruit are very juicy and quite big in size. Plant breeding to get improved cultivars is not difficult because the Pyrus plants are easy to cross breeding among its genus. Because not only this reason but there have been shown lots of variation in wild groups, the Pyrus plants inhabited in Korea are excellent deciduous woody plants and favorable fruit trees to develop ornamental plants. It is necessary to develop many kinds of fruit trees and ornamental trees containing genetically different character, so that it will be satisfied for many different people's taste and demands. Collecting lots of wild plant resource with diverse genes is necessary for plant breeding.