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RISS 인기검색어
- 검색키워드
- 저자 : 崔鳳鎬(Bongho Choe) (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
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A maize inbred line “Euisung” resistant to black streaked dwarf virus
Bongho Choe(崔鳳鎬),Keun Yong Park(朴根龍) 한국육종학회 1986 한국육종학회지 Vol.18 No.4
The black strecked dwarf virus(BSDV) is one of the most destructive maize virus diseases in southern part of Korea. As one measure to counterattack the disease, a breeding program was initiated in 1979 at the Chungnam National University in cooperation with the Crop Experiment Station, Rural Development Administration. The breeding materials used were all collected from Korean local areas. After a series of breeding efforts, an inbred line, Euisung, was developed and screened out as a resistant line from field screening tests conducted at two locations in 1986. The Euisung inbred line had no apparent disease symptoms throughout the growth period, while susceptible lines were all stunted during early stage of growth. The genetic nature of the disease resistance in the line is not known yet, but the the Euisung line may have a great breeding potential for developing disease resistant hybrieds in Korea.
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Agronomic characteristics of maize inbreds with Tillers and their hybrids
Bongho Choe(崔鳳鎬),Heebong Lee(李喜鳳),Wonkoo Lee(李元九) 한국육종학회 1991 한국육종학회지 Vol.23 No.4
In order to develop maize hybrids with tillers, two tillering maize inbreds, IK2 and IK3, were developed in addition to IK1 formerly reported. The lines were developed by ear-to-row selection method and self-fertilization of maize populations grown in Korea. IK2 was derived by selfing the F₁ between a tillering maize line from Korea and an inbred line, B68, from the U. S. A. One of the criteria for plant selection was the number of tillers per plant. After eight generations of selfing, IK2 and IK3 were considered fixed in producing two to three tillers per plant under ordinary plant spacing. Each tiller of the two inbreds had at least one harvestable ear. IK2 has more upright tillering habit than IK3. The IK2 and IK3 were evaluated as parents for tillering hybrids for three years and they performed well for producing more dry weight than single-stalked hybrid because of its large tillers, but the single-stalked hybrid had a higher grain content than the multi-tillered hybrids. The F₁ between IK2 and IK3 produced very uniform number of tillers per plant. F₁s, between the inbreds showed positive values of heterosis for plant height, tillers per plant, ear height, ears per plant, kernel weight per plant, 100-kernel weight, dry weight and for kernel yield per 10a.
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多穗多蘖性 옥수수 硏究 Ⅵ. IK 自殖系統의 導入系統과의 組合能力
Heebong Lee(李喜鳳),Bongho Choe(崔鳳鎬) 한국육종학회 1991 한국육종학회지 Vol.23 No.4
This experiment was conducted to develop hybrid corn with tillers. Seven hybrids, which were made from crosses among the three derived lines from Korean local maize lines(IK₁, ₂, and IK₃) and two exotic inbreds(PI213749 and Teosinte), were compared with check hybrids(P3160). Tasseling days of tillered hybrids were generally delayed by 7 days, while stem height of hybrids tillering were similar and ear height were high compared with check hybrid. Number of tillers per plant in all tillering hybrids were about 4.0, but effective tiller of these was only 2 to 3. Average ears per plant were about 5. Especially, ear size and seed set of IK₂/PI213749 of these hybirds were very promising. Accordingly, yield per 10a of these tillered hybrids wad also higher than that of check hybrid. Fresh weight per 10a was 10.3tons in IK₂/PI213749. Dry weight of these hybrids(1.7tons) was significantly higher than that of the check hybrid(1.2 tons). Correlation coefficients between fresh weight and tillers per plant, and stem height, and tillers per plant were very high, and between yield per 10a and ears per plant, and kernels weight per plant, and ear weight per plant, and 100 kernel weight were also high. Estimated heritabilities of tillers per plant and ears per plant were very low but heritabilities for other characteristics were very high. The contribution of ear weight and tillers upon yield per 10a were assumed to be the most influential characteristics by path coefficient analysis. However, these characteristics were regared as a effective selection marker for the hybrids development with multi-ear and tillers.
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