The Heading Response and Regional Adaptability of Rice Varieties under the Temperature and Day-Length Conditions of Major Rice Production Areas in North Korea

Woonho Yang; Shingu Kang; Jong-Seo Choi; Dae-Woo Lee

doi:10.7740/kjcs.2022.67.4.222

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2022 Vol.67, Issue 4 Preview Page Next Page

Original Research Article

The Heading Response and Regional Adaptability of Rice Varieties under the Temperature and Day-Length Conditions of Major Rice Production Areas in North Korea 북한 주요 벼 재배지역의 기온과 일장 환경에서 품종의 출수 반응과 지역 적응성 분석

1 December 2022. pp. 222-233

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Abstract

The heading responses of rice varieties that originated from South Korea, North Korea, and northern China were examined under the temperature and day-length conditions of 13 major rice production areas in North Korea. Kenjiandao3 and Nongdae3 originated from China, Olbyeo1, Olbyeo2 and Sonbong9 from North Korea, and Joun from South Korea demonstrated the earliest heading stage depending on the regional environment. Out of 40 rice varieties, 34 reached the heading stage within the regional safe marginal heading date (SMHD) under Haeju and Sariwon environmental conditions, while 16 to 17 varieties reached the heading stage under Wonsan, Changjon, Supung, and Yongyon environmental conditions. Some middle and mid-late maturing varieties that originated from South Korea reached the heading stage within the SMHD under the temperature and day-length conditions of Kaesong, Haeju, Sariwon, Nampo, and Pyongyang that are located in the west-southern plain. The majority of early maturing varieties, but not the middle or mid-late ones, reached the heading stage within the SMHD under the environmental conditions of Singye, Anju, Kusong, and Sinuiju. Only a few early maturing varieties demonstrated the heading stage within the SMHD under Yongyon, Changjon, and Wonsan environments. The number of days to heading was highly positively correlated among all regions; however, it was not consistent among the rice varieties. The 40 rice varieties that had been tested were classified into seven groups according to their heading responses to the temperature and day-length variations of the 13 regional conditions at 65% similarity level in cluster analysis.

Keywords

day-length

heading response

North Korea

rice

temperature

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Information

Publisher :The Korean Society of Crop Science
Publisher(Ko) :한국작물학회
Journal Title :The Korean Journal of Crop Science
Journal Title(Ko) :한국작물학회지
Volume : 67
No :4
Pages :222-233
Received Date : 2022-09-06
Revised Date : 2022-10-21
Accepted Date : 2022-10-31
DOI :https://doi.org/10.7740/kjcs.2022.67.4.222

The Korean Journal of Crop Science ISSN:0252-9777(Print) 2287-8432(Online) 한국작물학회지

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