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RISS 인기검색어
- 검색키워드
- 저자 : 알 엔 카우(R.N. Kaw) (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
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Estimates of combining ability for vegetative stage cold tolerance in rice
알 엔 카우(R. N. Kaw),로미 엠 비스페라스(R. M. Visperas),Huhn Pal Moon(文憲八),Jong Doo Yae(芮種斗) 한국육종학회 1986 한국육종학회지 Vol.18 No.1
Ninety F₁ rice hybrids were evaluated for combining abilily for low-temperature tolerance at the vegetative growth stage. Evaluation was done by subjecting the plant to 17℃ and 20℃ water temperatures in separate blocks from 20 days afler transplanting to maturity. Combining ability analysis showed the predominance of additive gene action. The Japonica parents viz. Shimokita, K48, SR5204-91-4-1, Stejaree 45, Barkat and K332 were good donors for vegetative stage cold tolerance. The best sca combinations involved both high and low general combiners. Parental performance per se was a good indicator of gca effects of the parents.
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Heterosis for vegetative stage cold tolerance in rice
Huhn Pal Moon(文憲八),알 엔 카우(R.N. Kaw),Jong Doo Yae(芮鍾斗) 한국육종학회 1987 한국육종학회지 Vol.19 No.4
Heterosis for low-temperature tolerance at the vegetative growth stage was studied in ninety F₁ rice hybrids. The F₁s were transplanted in 2.25-m long single row plots, replicated thrice and were subjected to cold water stress at 17℃ and 20℃, in separate blocks, starting from 20 days after transplanting until maturity. Leaf-discoloration was used as a measure of cold tolerance at the vegetative stage. Average mid-parent heterosis of - 40.7% and high-parent heterosis of - 61.9% was recorded in the japonica/indica group of crosses as compared to -18.6% and -26.0%, respectively, in the indica/indica group. Heterosis for cold hardiness was greater for the japonica/indica group of hybrids with 95.8% hybrids showing significant negative mid-parent heterosis and 100% high-parent heterosis (low leaf-discoloration scores mean high cold hardiness). In indica/indica group, only 6.3% had lower scores in japonica/indica group, suggesting some involvement of complimentary gene action in the inheritance of cold hardiness. Barkat/IR 29506, Shimokita/IR 29506 and Suweon 235 /IR 29506 from the japonica/indica group exhibited better cold tolerance than their respective cold tolerant parents. The correlation between mid-parent value and hybrid perfromance was of sufficient magnitude to indicate that prediction of hybrid performance from parental value should prove effective.
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