KOREAN JOURNAL OF CROP SCIENCE (한국작물학회지)
- Volume 42 Issue 3
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- Pages.270-274
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- 1997
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- 0252-9777(pISSN)
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- 2287-8432(eISSN)
Combining Ability of Japonica Rices for Salinity Tolerance at Seedling Stage
자포니카 벼 품종의 유묘 내한성에 대한 조합능력
- Lee, Kyu-Seong (National Honam Agricultural Experiment) ;
- Park, Nam-Kyu (Research Management Bureau, RDA) ;
- Yang, Sae-Jun (Research Management Bureau, RDA)
- Published : 1997.06.01
Abstract
This experiment was conducted to evaluate the combining ability of japonica rices for improving the salinity tolerance at seedling stage. Nine varieties used in partial diallel analysis included three varieties of each tolerant, moderately tolerant and susceptible one. Twelve-day-old seedlings were grown in saline solution, initially at an EC of 6 dS /m for four days, followed by an EC of 12 dS /m for 20 days. The agronomic characters at seedling stage such as plant height, dry shoot weight and dry root weight were measured to analyze for combining ability of the parents. General combining ability(GCA) and specific combining ability(SCA) effects were highly significant for all tested parameters. However, mean squares for GCA were about five times larger than that for SCA suggesting the preponderance of additive gene action. Among tolerant varieties, Gaori and Namyang 7 were good combiner for improving the salinity tolerance at seedling stage in GCA as well as SCA.
자포니카 벼 내염성 품종육성을 위한 모본들의 조합능력을 아는 것은 교배친의 선정과 육종효율면에서 대단히 중요하다. 본 연구는 유묘기 내염성 관련형질에 대해 내염성 정도가 다른 9개 품종을 가지고, 이면 교배를 실시하여 모본 및 F