• Korean Journal of Plant Taxonomy
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• v.46 no.4
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• pp.378-391
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• 2016

Eighteen morphological characters from 40 populations and ten isozyme loci from 35 populations of Sedum latiovalifolium and related species were examined to investigate the degree of morphological and genetic variation. The high-frequency marker alleles $MDH-2^a$ and $PGI-1^a$ in S. aizoon, S. kamtschaticum, and S. zokuriense did not appear in the populations of S. latiovalifolium. In addition, the high-frequency allele ($MDH-2^c$) in S. latiovalifolium appeared at a very low frequency in other subg. aizoon species. Thus, the isozyme data did not support a hybrid origin of S. latiovalifolium from S. aizoon with S. kamtschaticum. The results of an unweighted pair-group method using the arithmetic average method and a principal components analysis using morphological data also did not support a hybrid origin of S. latiovalifolium. However, our data strongly suggest that some individuals from the populations found in the Gumdaebong area were most likely hybrids due to introgression between S. latiovalifolium and S. kamtschaticum or S. aizoon and S. kamtschaticum.

• Journal of Life Science
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• v.18 no.7
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• pp.907-911
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• 2008

Radish (Raphanus sativus L.) is one of very important crop plants in the world. It is very important to determine hybrid seed quality in the production of hybrid Brassica vegetable seeds to avoid unacceptable contamination with self-inbred (sib) seeds. The allozyme for evaluating seed purity in a commercial $F_1-hybrid$ radish cultivar is demonstrated. Three hundred sixty seeds from the male and female harvest were subsequently screened for seed purity using 27 isozyme loci. Especially, F1 hybrids of radish, Per-1 ($aa{\times}bb$), Lap-1 ($aa{\times}bb$), Est-1 ($aa{\times}bb$) were presented clear hybrid bands. Est-1 locus revealed that 15 (8.3%) seeds from the female harvest and 26 (14.4%) seeds from the male harvest were sibs. It maintains higher than average level of genetic diversity compared with their correspondent parents. Shannon's index of phenotypic diversity (I) of hybrids was the highest of all accessions (R. sativus L. cv. Daepeng, R. sativus L. cv. Backza, and their hybrids). The allozyme may lead to a better insight into the hybrid seed purity.

• The Bimonthly Magazine for Agrochemicals and Plant Protection
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• v.4 no.8
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• pp.56-63
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• 1983

화본과 식물에 속하며 염색체 수가 n=10개인 옥수수의 유연식물 또는 야생종으로 생각되는 식물에는 남아메리카 일부 지방에서 야생하는 부유종과 멕시코 지방의 테오신트(Teosinte grass)와 중앙아메리카에 분포하는 옥수수와 교잡이 가능하다는 가마그라스(Gamagrass)의 3종이 옥수수의 기원이라는 학설이 있다.

• Journal of Korean Society of Forest Science
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• v.89 no.1
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• pp.18-23
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• 2000

Leaves of various, 3 to 5-year-old Quercus hybrids were intermediate in size between their parental species. The petiole length was the smallest in the hybrids of Q. dentata ${\times}$ Q. crispula $F_1$ and was intermediate in the hybrids of Q. aliena ${\times}$ Q. serrata $F_1$ and Q. dentata ${\times}$ Q. aliena $F_1$ between their parents. The number of serration in hybrids was close to their mother tree's in most of crossing combinations. The serration depth and the ratio between longitudinal and transverse length of leaves were intermediate between the values of their parental species.

• Journal of Sericultural and Entomological Science
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• v.7
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• pp.49-52
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• 1967

In the F$_1$ hybrids and parents of silkworms, the silkworms of 47 blocks in summer and 68 blocks in fall in 1965 were reared in order to know the effect of mortality on the difference of sex ratio. The results analyzed are as follows; 1. In Moran of Japanese strain-parent and Morean x Daedong of F$_1$ hybrid, there is of no effect of an increase and decrease of mortality on the sex ratio. So male is not always stronger than female. 2. In Daedong of Chinese strain-parent, the more the mortality in the blocks is, the higher the survival ratio of male pupa becomes. (Y=0.233x-41.67). 3. As the results mentioned above, the present investigation method of cocoon quality of Chinese strains with the same number of cocoons of both sexes will have to be considered again, according to the cocoon crops, as far as concerned with the reasonable sampling from the population.

• Journal of Korean Society of Forest Science
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• v.87 no.2
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• pp.194-200
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• 1998

The difference in leaf bud flushing times of Quercus species and their hybrids was compared among the trees from natural forest, seedlings from natural pollination and artificial crossing. In the natural forest of the Hiruzen experimental forest of Tottori University, Japan, Quercus species flushed in the order of Q. crispula > Q. anguste-lepidota > Q. takatorensis ${\fallingdotseq}$ Q. serrate > Q. dentata. The flushing time of seedlings from natural pollination was in the order of Q. aliena ${\fallingdotseq}$ Q. crispula > Q. angustelepidota > Q. takatorensis ${\fallingdotseq}$ Q. serrate > Q. dentata. The flushing times of $F_1$ hybrids by artificial crossing were between those of parental species. From the result of interspecific hybridization, it is shown that the earliness of flushing in Quercus species is a genetic character considered hereditable to progenies.

• Journal of Korean Society of Forest Science
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• v.88 no.4
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• pp.485-489
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• 1999

The germination percentages of Quercus hybrid seeds produced in 1994 using stored pollens were low. The survival rate and height growth within 2 years differed according to crossing combinations. The survival rate and growth of seedlings from hybrid seeds produced in 1991 and 1993 were investigated. The survival rates of five-year-old and three-year-old seedlings were from 71 to 100% and from 33 to 100%, respectively. The survival rates differed according to cross combinations. The mortality of seedlings increased in proportion to the increase of percentages of dwarf seedlings. The growth of five-year-old seedlings, of which mother tree was Q. aliena, was the best. The growth of seedlings produced by artificial crossing tended to be worse than that of natural crossing.

• Journal of Korean Society of Forest Science
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• v.90 no.1
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• pp.19-27
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• 2001

From two to five-year-old hybrids of Q. serrate ${\times}$ Q. dentate; Q. dentata ${\times}$ Q. serrata, Q. dentate ${\times}$ Q. mongolica var. crispula, and Q. dentata ${\times}$ Q. aliena, intermediate-size of stellate hairs or both types of their parents have been observed. Especially the hybrids between Q. serrate and Q. aliena and Q. aliena and Q. serrate had both types of their parents. The trichomes of the hybrids between Q. fabri and Q. serrate was the characteristics of Q. serrate. It was possible to identify two to five-year-old of interspecific hybrids based on trichome characteristics.

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 2003.04a
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• pp.438-441
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• 2003

남해 동부 연안 지역 지하수의 해수 침투 영향을 광역적으로 파악하기 위하여, 202개소의 지하수 시료를 채취하고 수리지구화학적 연구를 수행하였다. 전체 시료 중 14.4%가 500 $\mu\textrm{m}$/cm을 초과하는 높은 EC값을 나타내어 해수 영향을 시사해 주었다. 해수 영향 판단의 또 다른 파라메터로 사용되는 CI/HCO$_3$ 몰비는 전체 시료의 23.3%가 1.3 이상의 값을 나타내었다. 한편, 대표적으로 해수침투 영향 및 인위적 오염의 영향을 각각 반영하는 것으로 알려진 Cl과 NO$_3$의 농도에 관한 누적도수분포도를 작성하여 배경수질군과 오염영향군을 구분짓는 배경치(background concentration)를 구한 결과, 각각 Cl = 22.3 mg/1 및 NO$_3$= 23.1 mg/l로 나타났다. 이 두 파라메터의 농도 분포를 기준으로 하여 채취된 지하수 시료를 크게 4개의 그룹으로 나눌 수 있었다. 그 결과, 자연적 또는 인위적 기원의 오염이 배제된 그룹 1은 전체 시료의 31%, 자연적 오염(해수 영향)을 반영하는 그룹 2는 전체의 24%, 인위적 오염의 영향을 반영하는 그룹 3은 전체의 9%, 해수 영향 및 인위적 오염을 동시에 반영하는 그룹4는 전체의 36%로 나타났다. 또한 그룹2와 그룹4는 대부분 Na-Cl유형으로 진화하는 Ca-Cl유형을 나타내었다. 따라서, 여러 지구화학 방법에 의한 해수 영향 판단 결과는 서로 잘 일치하고 있음을 알 수 있다. 결국, 지구화학적 파라메터를 종합적으로 활용함으로써, 연안 지역 해수침투의 효과적인 파악은 물론 예측 및 방지, 복구에 효과적으로 사용될 수 있을 것으로 판단된다.으로 토양에서 유동 가능성이 있는 중금속만을 추출하였다. 분석실험은 토양의 Cd2+ 와 Pb2+를 대상으로 행하여졌으며, 여러 토양에서 추출 분석한 결과를 EDTA분석결과와 비교하였다. 실험결과, 중금속은 매우 신속하게 고분자 자성체와 결합하였고, 그 후 자성체를 외부 자장으로 모은 후 산으로 용해시키고, 결합된 중금속은 Graphite furnace AAS로 분석함으로써 빠르고 효율적으로 분석실험을 수행할 수 있음을 알 수 있었다. 한편, 실험에서 나타난 수치들을 비교 검토한 결과 토양 분석시 sandy soil에서는 자성체를 이용한 분석이 EDTA에 의한 방법보다 더 높은 추출도를 보인 반면, silt 함량이 많은 토양의 경우에서 EDTA분석에서 더 높은 중금속 추출도를 보였다.s 중에서 490nm와 555nm의 복합밴드를 포함하는 OC2 알고리즘(ocean color chlorophyll 2 algorithm)을 사용하는 것이 OC2 series 및 OC4 알고리즘보다 좋은 추정 값을 도출할 수 있을 것으로 기대된다.환경에서는 5일에서 7월에 주로 이 충체의 유충이 발육되고 전파되는 것으로 추측되었다.러 가지 방법들을 적극 적용하여 금후 검토해볼 필요가 있을 것이다.잡은 전혀 삭과가 형성되지 않았다. 이 결과는 종간 교잡종을 자방친으로 하고 그 자방친의 화분친을 사용할 때만 교잡이 이루어지고 있음을 나타내고 있다. 따라서 여교잡을 통한 종간잡종 품종육성 활용방안을 금후 적극 확대 검토해야 할 것이다하였다.함을 보이고 있다.X> , ZnCl$_{3}$$^{-}$같은 이온과 MgCl$^{+}$, MgCl$_{2}$같은 이온종을 형성하기 때문인것 같다. 한편 어

• Journal of Life Science
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• v.14 no.4
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• pp.696-701
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• 2004

The present study was carried out to investigate the redcell types of horse breeds. A total of 210 horses (73 Korean native horses, 118 crossbreed horses, and 19 Mongolian horses) were tested a redcell types by serological procedure, and their phenotypes and gene frequencies were estimated. The blood groups phenotypes observed with highest frequency were Aa (27.4%, 63.6%, 63.2%), Ca (97.3%, 94.9%, 89.5%), K- (97.3%, 99.2%, 84.2%), Pa (39.7%, 44.9%, 42.1%), and Ua (71.2%, 70.3%, 63.2%) in the Korean native horse, crossbreed horse, and Mongolian horse, respectively. In the D system and Q system, phenotypes observed with highest frequency were Dbcm/dghm (12.3%), Dbcm/cgm (14.4%), Dcgm/dghm (15.8%), and Qc (56.2%), Qabc (36.4%), Qc (31.6%) in the Korean native horse, crossbreed horse, and Mongolian horse, respectively Alleles observed with highest frequency were A- (0.287), Ca(0.827), Ddghm (0.226), K- (0.985), Pa (0.358), Qc (0.494), U-(0.529) in the Korean native horse, Aa (0.529), Ca (0.776), Dbcm (0.306), K- (0.995), P- (0.531), Q- (0.504), U- (0.548) in crossbreed horse, and Aa (0.421), Ca (0.895), Ddghm (0.421), K- (0.842), Pa (0.447), Qc (0.448), Ua (0.632) in Mongolian horse. Dcfgk and D- alleles were not detected in these horses. These results present basic information for estimating the genetic relationships between the Korean native horse, and developing a system for parentage verification and individual identification in these horses.