• 한국작물학회:학술대회논문집
• /
• 한국작물학회 2017년도 9th Asian Crop Science Association conference
• /
• pp.339-339
• /
• 2017

The long grain rice varieties adaptable to South-east Asia tropical regions were tried to develop in Cambodian Agriculture Research and Development Institute (CARDI), Cambodia. The final goal is to develop rice varieties which can culture in diverse environmental conditions of tropical regions of South-east Asia under climate change. We collected and evaluated for agronomic traits of 131 rice germplasm from Cambodia, China, India, Indonesia, Myanmar, Philippines and Vietnam in CARDI. We selected core germplasm including leading varieties of target countries and made 813 F1 cross combinations between leading varieties of each country and promising germplasm of high yield potential, resistance to biotic/abiotic stresses, aromatic rice, and so on. Out of 607 F1s evaluated to heading date, plant type, agronomic traits, and grain type, 106 F1s selected and advanced to F2 populations. 106 F2 populations were evaluated to major agronomic traits, grain type and yield-component traits, and selected 2,560 plants in 62 F2 populations. During six seasons in 2014~2016, the lines of F3 subsequent-generation were cultured a total of 6,256 lines. In yield trial for promising lines in F5 generation, the growth duration from sowing to harvesting was 97~114 days. These lines were 88~129 in number of grain per panicle, an average of 84.6% in the range of 79.3~91.9% in the percentage of ripened grain and 17.5~22.8g in 1000-brown rice weight. The rough rice yields were in the range of 4.33~6.06 ton/ha with an average of 5.23 ton/ha. The yield was increased to 5~47% than Chulsa and 12~41% than IR66. Five lines, KR54-28-1, KR55-14-2, KR57-5-2, KR67-57-2 and KR128-19-1 were 5.33~6.06 ton/ha in rough rice yield. These high yield potential lines would be evaluated to adaptability in Cambodia, Laos, Myanmar and Vietnam during 2017.

• 한국작물학회:학술대회논문집
• /
• 한국작물학회 2017년도 9th Asian Crop Science Association conference
• /
• pp.155-155
• /
• 2017

The long grain rice varieties adaptable to South-east Asia tropical regions were tried to develop in Cambodian Agriculture Research and Development Institute (CARDI), Cambodia. The final goal is to develop rice varieties which can culture in diverse environmental conditions of tropical regions of South-east Asia under climate change. We collected and evaluated for agronomic traits of 131 rice germplasm from Cambodia, China, India, Indonesia, Myanmar, Philippines and Vietnam in CARDI. We selected core germplasm including leading varieties of target countries and made 813 F1 cross combinations between leading varieties of each country and promising germplasm of high yield potential, resistance to biotic/abiotic stresses, aromatic rice, and so on. Out of 607 F1s evaluated to heading date, plant type, agronomic traits, and grain type, 106 F1s selected and advanced to F2 populations. 106 F2 populations were evaluated to major agronomic traits, grain type and yield-component traits, and selected 2,560 plants in 62 F2 populations. During six seasons in 2014~2016, the lines of F3 subsequent-generation were cultured a total of 6,256 lines. In yield trial for promising lines in F5 generation, the growth duration from sowing to harvesting was 97~114 days. These lines were 88~129 in number of grain per panicle, an average of 84.6% in the range of 79.3~91.9% in the percentage of ripened grain and 17.5~22.8g in 1000-brown rice weight. The rough rice yields were in the range of 4.33~6.06 ton/ha with an average of 5.23 ton/ha. The yield was increased to 5~47% than Chulsa and 12~41% than IR66. Five lines, KR54-28-1, KR55-14-2, KR57-5-2, KR67-57-2 and KR128-19-1 were 5.33~6.06 ton/ha in rough rice yield. These high yield potential lines would be evaluated to adaptability in Cambodia, Laos, Myanmar and Vietnam during 2017.

• 한국자원식물학회지
• /
• 제31권5호
• /
• pp.489-497
• /
• 2018

본 연구는 메밀 유전자원의 재배시기별 농업특성과 플라보노이드 함량을 수집 지역별로 비교하여 메밀 신품종 육성을 위한 소재와 기초정보를 제공하기 위해 수행되었다. 메밀의 개화기와 성숙기는 봄 재배에서는 파종일로부터 각각 40일과 90일이 소요되었으며, 가을재배에서는 31일과 69일로 가을 재배시 더 빠른 개화기와 성숙기를 보였다. 수량성과 관계된 주경절수와 총분지수 조사결과 봄 재배시 주경절수는 평균 15.6개, 가을 재배시 11.7개였고, 총분지수는 봄 재배에서 15.9개, 가을 재배에서 10.6개로 조사되어 봄 재배시 영양생장이 왕성함을 알 수 있었다. 그러나 백립중은 가을 재배시 평균 3.38 g으로 봄 재배의 2.51 g보다 더 무겁게 조사되었다. 수집지역별 특성을 조사한 결과 주경절수와 총분지수는 봄, 가을 재배 모두에서 전남 수집자원이 가장 많은 것으로 확인되었으며, 강원 수집자원이 가낭 낮게 조사되었다. 백립중은 강원 수집자원이 봄, 가을 재배에서 각각 2.63 g과 3.66 g으로 가장 높았으며 전남 수집자원은 반대로 가장 낮은 백립중인 2.40 g과 3.14 g을 나타내었다. 이 결과들은 메밀 유전자원의 재배 시기 및 수집 지역에 따라 생육특성 및 종자 생산이 달라짐을 의미한다. 메밀 플라보노이드 함량을 조사한 결과 봄 재배에서 0.20 mg/g DW, 가을 재배에서 0.40 mg/g DW의 플라보노이드 함량이 검출되어 봄 재배보다 가을 재배에서 2배 정도 높은 플라보노이드 함량을 확인하였다. 성숙 종자의 대부분을 차지하는 rutin 함량은 가을 재배에서 봄 재배보다 최소 1.2배에서 최대 3.8배 이상 높게 나타났다. 이는 봄과 가을 재배 시 비록 같은 자원을 사용했더라도 재배 환경이 플라보노이드 축적에 많을 영향을 주었으며, 재배 시기가 플라보노이드 축적에 중요한 요인임을 시사한다. 이들 결과를 종합할 때 메밀 품종 육성 시 유전자원의 재배시기별 특성과 플라보노이드 함량을 고려한 재료선발이 필요할 것으로 사료된다.