http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Effect of Low Temperature on Heterosis for Traits Related to Cold Tolerance in Japonica Rice
Sang Nag Ahn,Eung Gee Jeong,Jong Doo Yea 한국육종학회 2004 한국육종학회지 Vol.36 No.3
Forty-four F1 hybrids derived from crosses among eleven temperate japonica rice cultivars were grown and evaluated for traits related to cold tolerance including days to heading and spikelet fertility in the cold-water irrigated plot (17℃) and
DNA Marker Facilitated Analysis and Selection of Low Tiller Number in Rice
Sang Nag Ahn,Soo Jin Kwon,Dong Beom Yoon,M. Y. Saleem,Jung Pil Suh 한국육종학회 2003 한국육종학회지 Vol.35 No.4
Molecular markers were used to map and characterize quantitative trait loci (QTLs) for panicle number per plant and other traits of agronomic importance in an inter-subspecific cross population of rice. The parents of the cross were a Tongil-type cultivar
Sang-Min Yeo,Yeo-Tae Yun,Hae-Hwang Kim,Sang-Nag Ahn 한국육종학회 2013 한국육종학회 심포지엄 Vol.2013 No.07
Grain size is a major determinant of grain yield in rice. In a previous study, a QTL for grain width(GW), qgw1 was detected on chromosome 1 using 96 BC3F8 lines derived from a cross between ‘Hwaseongbyeo’ as a recurrent parent and ‘O. rufipogon’ as a donor parent. At this locus, the O. rufipogon allele increased GW. Among the 96 introgression lines, three ILs with the O. rufipogon qgw1 locus showed significantly increase in grain width compare to the recurrent parent. One of the three lines, CR572 was selected and crossed to ‘Hwaseongbyeo’. A total of 494 F2:3 were evaluated for grain width and agronomic traits in the field. QTL analysis in 494 F2:3 lines indicated that QTL for grain width was located in the interval RM495–RM5443. To narrow down the position of qgw1, substitution mapping using F4 lines with different cross-over breakpoints in the region is underway. The result will be discussed.
Relationship Between Heterosis and Genetic Divergence in Tongil-type Rice(Oryza sativa L.)
Ahn, Sang-Nag,Kim, Yun-Sun 충남대학교 농업과학연구소 2001 농업과학연구 Vol.28 No.1
RAPDs 분석에 양친의 유전적 유사성 정도가 F1 잡종강세 예측에 효율적으로 이용될 수 있는지 알아보고자 통일형 6 품종 (밀양42, IR747, 백운찰벼, 삼강벼, 수원307, 이리 356) 간 반이면 교배 F1 15조합을 작성하였다 양친과 F1을 공시하여 조사한 수량 등 8개의 특성과 RAPDs 분석을 통해 구한 양친의 유전적거리와의 관계를 조사하였다. 120개의 Operon 프라이머를 6개 품종의 DNA 증폭에 이용한 결과 336개의 밴드가 발생되었으며 이중 168개가 6개 품종 중 1개 이상의 품종에서 변이를 보였다. 6품종간 유전적 거리는 최소 0.157(백운찰벼와 수원307호 간), 최대 0.383(삼강벼와 이리356호 간)의 분포를 보였다. 잡종강세의 정도는 정조수량(129%), 수당립수(125%), 수장(109%) 등이 높은 잡종강세를 보였고, 유전적거리는 수당립수와 통계적으로 유의한 부의 상관을 보였지만, 정조수량, 천립중등과는 유의한 상관을 보이지 않았다 In this study we evaluated genetic divergence among six Tongil-type rice varieties and assessed the relationship between genetic &stance and hybrid performance in all possible non-reciprocal crosses between them The 15 F1 hybrids along with the six parents were evaluated for eight traits of agronomic importance including yield in a replicated field trial The six parents were examined for DNA polymorphism using 120 random decamer oligonucleotide primers A total of 168 polymorphic variants were generated and based on the polymorphism data. genetic distances (GDs) ranged from 0157 to 0.333 Heterosis was observed in hybrids for most of the traits, and yield exhibited the highest heterosis among the eight traits examined The correlation values of GDs with F1 performance were not significant. Also the correlations of GDs with midparent and better-parent heterosis were not significant except for spikelets per panicle Our results have indicated that GDs based on the RAPDs markers may not be useful for predicting heterotic combinations in Tongil-type rice and are supportive of the idea that the level of correlations between hybrid performance and genetic divergence is dependent on the germplasm emploved.