Comparative Analysis on the Relationship between Head Rice Yield and Its Components in Korean High-quality Rice Varieties
2016
Yang, W., National Institute of Crop Science, Rural Development Administration, Suwon, Republic of Korea | Choi, K.J., National Institute of Crop Science, Rural Development Administration, Wanju, Republic of Korea | Shon, J., Rural Development Administration, Jeonju, Republic of Korea | Kang, S., National Institute of Crop Science, Rural Development Administration, Suwon, Republic of Korea | Shin, S.H., National Institute of Crop Science, Rural Development Administration, Suwon, Republic of Korea | Shim, K.B., National Institute of Crop Science, Rural Development Administration, Suwon, Republic of Korea | Kim, J., National Institute of Crop Science, Rural Development Administration, Wanju, Republic of Korea | Jung, H., National Institute of Crop Science, Rural Development Administration, Wanju, Republic of Korea | Jang, J.H., Gyeonggi-do Agricultural Research and Extension Services, Hwaseong, Republic of Korea | Jeong, J.S., Chungcheongbuk-do Agricultural Research and Extension Services, Cheongju, Republic of Korea | Lee, C.Y., Chungcheongbuk-do Agricultural Research and Extension Services, Cheongju, Republic of Korea | Yun, Y.T., Chungcheongnam-do Agricultural Research and Extension Services, Yesan, Republic of Korea | Kwon, S.J., Jeollabuk-do Agricultural Research and Extension Services, Iksan, Republic of Korea | An, K.N., Jeollanam-do Agricultural Research and Extension Services, Naju, Republic of Korea | Shin, J.H., Gyeongsangbuk-do Agricultural Research and Extension Services, Daegu, Republic of Korea | Bae, S.M., Gyeongsangnam-do Agricultural Research and Extension Services, Jinju, Republic of Korea
This study was conducted, using 10 high-quality rice varieties, at 24 experimental sites in 2013 and 2014 to analyze the comparative relationship among head rice yield (HRY), its attributes and sub-attributes. In the data set pooled across sites, years and varieties, where regional and varietal variations were combined, HRY was associated with milled rice yield (MRY) more closely than percentage of head rice (PHR) although both MRY and HRY demonstrated significant relationship with HRY. In the PHR higher than 80%, compared to 80% or less, fitness of the regression between PHR and HRY decreased. MRY and PHR, the two attributes of HRY, were not significantly associated with each other. Regional variation of HRY was associated only with MRY while varietal variation of HRY was related to both MRY and PHR. HRY and MRY showed regional variation greater than varietal variation meanwhile PHR demonstrated regional and varietal variations in a similar range. In the data set pooled across sites, years and varieties, MRY demonstrated relationship with spikelets per square meter (SPIK) in a higher significance than percentage of grain filling (PGF) and 1000-brown rice weight (TBRW). Both regional and varietal variations of MRY showed significant relationship only with SPIK, neither with PGF nor TBRW. It is concluded that regional variation of HRY was affected by MRY, varietal variation by both MRY and PHR, and region-variety combined variation mainly by MRY.
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