• 한국작물학회지
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• 제45권4호
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• pp.245-250
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• 2000

This study was conducted to analyze the responses of some agronomic traits to the different cultural environments and relations among the agronomic traits for selecting sesame varieties with higher cultural stabilities. The indexes for stability parameters measured were coefficient of variability, heritabilities, genetic correlations and path coefficients of agronomic traits according to locations and years in Korea. The heritabilities of agronomic traits showed different by locations and years. Number of seeds per capsule and 1000 seeds weight showed higher heritabilities, but stem length and seed weight per plant showed relatively lower heritabilities. Average heritabilities of some agronomic traits in 1998 were comparatively higher than those of 1999. Of six areas, Jinju area showed biggest coefficient of yield variability in 1998-1999. Iksan and Taegu areas showed higher heritabilities in 1998, but Iksan and Jinju areas showed lower heritabilities in 1999. Genetic correlations were slightly higher than corresponding phenotypic correlations. Stem length showed positive genetic correlation with the number of capsules per plant, and seed weight per plant and the number of capsule per plant showed positive genetic correlation with seed weight per plant. On the analysis of path coefficients, stem length and number of capsules effected highly on grain yield. Great regional variations were observed on the effects of agronomic traits on grain yield. Higher direct effects of stem length on grain yield were observed at Suwon, Chungwon, Taegu, Jinju and Naju areas, but in Iksan area was observed higher direct effect of the number of capsules per plant on grain yield in 1998. In 1999, higher direct effect of stem length on grain yield was observed at Chungwon and Suwon areas. Iksan and Taegu areas were also observed higher direct effect of the number of capsule per plant on grain yield.

• 한국자원식물학회지
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• 제17권3호
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• pp.304-313
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• 2004

본 연구는 교잡종 옥수수의 품종개발 및 옥수수의 생산능력 방법을 개선하기 위한 기초연구로 미국에서 도입된 유망자식계통들을 이용한 5개의 교배조합들 그리고 이들의 F$_1$ 및 F$_2$ 세대에서 6개의 농업형 질들에 대한 유전양상을 구명하였다. 공시된 5개의 교배조합들과 조사된 6개의 농업형질들에서의 잡종강세효과는 교배조합 및 농업형질들에 따라 다소 차이는 있었지만 교배조합들 중에서는 Mo17/B14A, Va85/B73조합들이 조사된 대부분의 형질들에서 가장 뚜렷한 잡종강세 효과를 나타내었으며 , 그리고 조사된 6개의 농업형질들 중에서는 종자생산량이 교배조합들 사이에서 가장 큰 잡종강세 효과를 나타내었다. 조사된 6개의 농업형질들 중에서 종자생산량은 5개의 교배 조합들 중에서 C103/ND203과 FR35/Oh43 조합을 제외한 나머지 조합들에서 자식약세 현상이 다른 형질들보다 가장 크게 나타났고, 그리고 이들 수량관련 형질들은 일부 교배조합들에서의 예외적 경우를 제외하면 모두 정의 방향으로 자식 약세 현상이 나타나는 것으로 관찰되었다. 공시된 5개의 교배조합들 중에서 Mo17/B14A, C103/ND203 조합들은 조사된 6개의 농업형질들 모두에서 50%이상의 비교적 높은 유전성을 나타내었고, 반면에 Va85/B73 조합은 100립 중을 제외한 모든 형질들에서, 그리고 FR35/Oh43 조합은 간장과 착수고를 제외한 모든 형질들에서 50% 이하의 낮은 유전력을 나타내었다. 그리고 조사된 6개의 농업형질들 중에서 이삭길이를 제외한 모든 형질들은 5개의 교배조합들 모두에서 평균 유전력이 50% 이상을 나타내었으므로 이러한 형질들은 옥수수의 교잡육종을 위한 중요한 선발형질들임을 나타내었다 이상의 결과에 의하면, 본 연구에 이용된 5개의 교배 조합들 중에서 대비 조합으로 쓰인 Mo17/B14A(수원19호)조합은 조사된 대부분의 형질들에서 비교적 높은 생육 및 수량특성을 나타내었으므로 옥수수의 계통선발에 의한 품종육성에 유용한 품종 및 자원인 것으로 확인되었다.

• Plant Breeding and Biotechnology
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• 제7권3호
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• pp.186-199
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• 2019

We selected 68 Chinese maize inbred lines to understand the genetic diversity, population structure, and marker-trait associations for eight agronomic traits and 50 simple sequence repeats (SSRs) markers. In this study, effective traits, such as days of anthesis (DA), days of silking (DS), ear height (EH), plant to ear height ratio (ER), plant height (PH), and leaf width (LW) were divided into PC1 and PC2 by PCA analysis for maize inbred lines. Genetic diversity analysis revealed a total of 506 alleles at 50 SSR loci. The mean number of alleles per locus was 10.12. The averages of genetic diversity (GD) and polymorphic information content (PIC) values were 0.771 and 0.743, respectively. Based on a membership probability threshold of 0.80, the population structure revealed that the total inbred lines were divided into three major groups with one admixed group. A marker-trait association using Q + K MLM showed that nine SSR markers (bnlg1017, umc2041, umc2400, bnlg105, umc1229, umc1250, umc1066, umc2092, and umc1426) were related with seven agronomic traits. Among these SSR markers, eight SSR markers were associated with only one agronomic trait (DA, DS, ER, LL, LW, PH, and ST), whereas one SSR marker (umc1229) was associated with two agronomic traits (DA and ST). These results will help in optimizing the choice of inbred lines for cross combinations, as well as in selecting markers for further maize breeding programs.

• Journal of Crop Science and Biotechnology
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• 제11권3호
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• pp.171-176
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• 2008

The agronomic traits, such as days to flowering and maturity, plant height, 100-seed weight and seed filling period, are quantitatively inherited and important characters in soybean(Glycine max L. Merr.). A total of 126 $F_5$ recombinant inbred lines(RILs) developed from the cross of PI 171451$\times$Hwaeomputkong were used to identify quantitative trait loci(QTLs) for days to flowering(FD), days to maturity(MD), plant height(PH), 100-seed weight(SW), number of branches(NB) and seed filling period(FP). A total of 136 simple sequence repeat(SSR) markers segregated in a RIL population were distributed over 20 linkage groups(LGs), covering 1073.9 cM of the soybean genome with the average distance between adjacent markers of 7.9 cM. Five independent QTLs were identified for FD, three for MD, two for PH, three for SW, one for NB and one for FP. Of these, three QTLs were related to more than two traits of FD, MD, PH, NB and FP and mapped near the same positions on LGs H and O. Thus, these traits could be correlated with biologically controlled major QTLs in this soybean RIL population.

• Journal of Crop Science and Biotechnology
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• 제10권4호
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• pp.249-256
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• 2007

A study was conducted to observe the variation and inheritance of agronomic traits and their interrelationship in mungbean. The objective of the study was to compare agronomic traits and hardseed percentage of 268 recombinant inbred lines(RILs) developed from the cross between wild Vigna subspecies sublobata "ACC 41" with the mungbean cultivar "Berken". The RIL population and their parents were evaluated under controlled conditions in a glass house at the University of Queensland, Brisbane, Australia. The results showed significant differences among the RILs and among the parents in all traits under study. Berken had a longer flowering date and a higher seed weight per plant, but less total leaf number and pod number per plant than ACC 41. A germination test between papers revealed that ACC 41 was 100% hard-seeded and did not germinate at all, while Berken germinated up to 100%. Their RILs distributed well between 0 to 100% hardseed. Upon scarification, all hardseed germinated within seven days. Narrowsense heritability estimates of total leave number, hardseedness, pod length, and pod width were highly heritable at 89.9, 98.9, 93.7, and 93.2%, respectively. The heritability of seed weight per plant and number of seeds per plant were lower at 63.1 and 58.4%, respectively. Seed weight per plant showed positive transgressive segregation when compared with ACC 41 and a positive correlation with 100 seed weight. While the number of seeds per pod showed a negative transgressive segregation when compared with Berken and a negative correlation with pod length and pod width. The RILs gave a 1:1 segregation ratio in leaflet shape, growth habit, and growth pattern, indicating that these traits were controlled by a single dominant gene.

• Journal of Plant Biotechnology
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• 제30권4호
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• pp.365-368
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• 2003

벼의 미수분 자방배양으로부터 분화된 후대집단 (0$_2$)의 주요 농업적 형질특성을 조사하고 이를 약배양 및 현미배양으로부터 분화된 후대집단과 상호비교하여 본 바, 주요농업형질의 계통내 고정도는 자방배양에서 87.9%,약에서는 89.8%,현미배양은 82.6%로 나타나 약배양과 마찬가지로 자방배양에서도 고정도가 높았다. 주요 형질별 분리양상을 보면 자방배양에서는 엽색이 4.2%로 가장 빈도가 높았으며, 약배양에서는 임성 (6.1%),현미배양에서는 엽색 (4.9%),임성 (4.9%)순이었다. 또한 캘러스를 1달과 2달 계대배양한 후대의 경우 간장에서 각각 8.9%와 10.0%로 분리하는 형질의 계통비율이 높게 나타났다. 간장, 수장, 출수기에 대한 변이성 정도는 자방배양에서는 약배양과 비슷한 정도의 변이를 보인 반면, 현미배양에서는 크게 나타났으며 간장과 수장의 평균은 모두 모품종인 화영벼에 비하여 줄어들었고 출수기는 다소 지연되는 경향을 보였다.

• 한국자원식물학회:학술대회논문집
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• 한국자원식물학회 2022년도 추계학술대회
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• pp.23-23
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• 2022

Rapeseed (Brassica napus L.) is one of the most valuable oilseed crop in the world. It is widely used in various industries, such as food, animal feed, energy and chemical industries. In order to improve the industrial requirements for rapeseed, useful agronomic characteristics (higher yields and disease resistance etc.) and modified oil traits (fatty acid composition and fat content) are important in rapeseed. However, Korea has limiting genetic resources of novel traits in rapeseed. In this research, novel rapeseed mutant genotypes by mutation breeding was developed. The mutant lines were generated by the treatment of the seeds of the original cultivar 'Tamra' with 700 Gy of gamma-ray (⁶⁰Co). Mutants showing varied in flowering time, crude fat content, seed yield and fatty acid content that exhibited stable inheritance of the mutated characteristics from M₅ to M₇ generations were selected. We investigated genetic variation using SNPs identified from GBS analysis in rapeseed mutant lines derived from the gamma-ray, and interactions between the major agronomic and the oil traits. Significantly associated SNP loci were explored along with candidate genes using SNPs obtained by GBS analysis. As a results of association mapping, a total of 322 SNPs were significantly associated with agronomic traits (155 SNPs) and oil traits (167 SNPs). A total of 70 genes were annotated from agronomic characteristics SNPs; among them 7 genes significantly enriched in developmental process, and a total of 70 genes were annotated from crude fat content and fatty acid compositions SNPs; among them, 11genes were significantly enriched in biosynthetic process. These results could be used for the selection of rapeseed cultivar with enhanced qualities and potential economic benefits.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2017년도 9th Asian Crop Science Association conference
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• pp.210-210
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• 2017

Sorghum is rich source of various phytochemicals including phenolic acids that have potential to significantly impact human health. Phytochemical production may be induced by not only genotype but a number of environmental factors including temperatures and amount of sunshine. The objective of this study was to determine the effect of planting date and harvesting stage on the agronomic and quality traits of 'Donganme' grain sorghum variety developed to produce high antioxidant activity. 'Donganme' were planted in three locations at four dates from early May to early July. Each planted fractions were harvested five times 35, 40, 45, 50, 55 days after head shooting date, respectively. Significant difference existed between the growth period and the agronomic traits. The interaction effects planting date and harvesting date was significant for plant height, tiller production, grain yield and antioxidant activity, indicating that low temperature and integrated sunshine influence on that traits. The result showed that antioxidant activity production occurred when the sorghum crop was grown in late season although the yield is lower. To produce antioxidant activity from sorghum grain need to consider the relation between the yield and nutrition component simultaneously.

• 한국연초학회지
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• 제24권2호
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• pp.130-132
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• 2002

The new burley tobacco variety, KB 301, was developed by the cross combination ’(Ky 17 x TI 1068)F$_4$ x TC 613’. The modified pedigree breeding method was used in the selection procedures. The agronomic traits and chemical constituents of KB 301 were very similar to those of Burley 21. But KB 301 had significantly higher content of total DVT than Burley 21. KB 301 was also resistant to black shank, TMV and PVY.

• 한국작물학회지
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• 제46권5호
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• pp.420-423
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• 2001

Combining ability in mungbean was studied in 15 quantitative traits through a 6 $\times$ 6 diallel cross. Both additive and non-additive gene effects were found conditioning the inheritane of nodes of the first peduncle, clusters per plant, clusters on main stem and branches, pods per plant, 1000 seed weight, grain yield per plant, biomass, and harvest index. The additive gene action was found significant for nodes on main stem, average internodal length, branches per plant, pods per cluster, pod length, and seeds per pod. The predominace of additive genetic variance was observed in all traits. For grain yield and yield components, the best combiner were VC3902A, VC1560D and ML-5, while the best combinations were the crosses VC3902A $\times$ ML-5, VC1560D $\times$ ML-5, and NM 92 $\times$ VC1560D.