Jeong, O-Young
(National Institute of Crop Science, RDA)
,
Lee, Jeom-Ho
(National Institute of Crop Science, RDA)
,
Hong, Ha-Cheol
(National Institute of Crop Science, RDA)
,
Jeong, Eung-Gi
(National Institute of Crop Science, RDA)
,
Paek, Jin-Soo
(National Institute of Crop Science, RDA)
,
Yang, Chang-Ihn
(National Institute of Crop Science, RDA)
,
Jeon, Yong-Hee
(National Institute of Crop Science, RDA)
,
Kim, Myeong-Ki
(National Institute of Crop Science, RDA)
,
Lee, Kyu-Seong
(National Institute of Crop Science, RDA)
,
Yang, Sae-Jun
(National Institute of Crop Science, RDA)
,
Lee, Young-Tae
(National Institute of Crop Science, RDA)
This experiment was carried out to evaluate the agronomic stability of North Korean rice varieties using the statistical model developed by Grafius, Finlay, and Ever hart. The lowest yearly variation based on coefficients of variation was found in Hannam 29 for number of panicles per hill, in Sijoon...
This experiment was carried out to evaluate the agronomic stability of North Korean rice varieties using the statistical model developed by Grafius, Finlay, and Ever hart. The lowest yearly variation based on coefficients of variation was found in Hannam 29 for number of panicles per hill, in Sijoong 9 for number of grains per panicle, in Pyeongyang 3 for ripened grain ratio, in Sijoong 16 for 1,000 grain weight, and in Yeomju 1 for grain yield. By Grafius's model, Pyeongbook 3, Weonsan 66 in early maturing groups and Seohaechalbyeo in medium maturing groups show stable for 3 years. Weonsan 66 in early maturing groups and Seohaechalbyeo in medium maturing groups were found to be highly stable as analyzed by both Finlay and Wilkinson's model and Everhart & Russell's model. With reference to three models, Weonsan 66 was highly stable for 3 years with showing more yield than Odaebyeo in early maturing groups while Seohaechalbyeo was highly stable for 3 years with showing high yield than Hwaseongbyeo in medium maturing groups above $5\;t\;ha^{-1}$ of milled rice respectively.
This experiment was carried out to evaluate the agronomic stability of North Korean rice varieties using the statistical model developed by Grafius, Finlay, and Ever hart. The lowest yearly variation based on coefficients of variation was found in Hannam 29 for number of panicles per hill, in Sijoong 9 for number of grains per panicle, in Pyeongyang 3 for ripened grain ratio, in Sijoong 16 for 1,000 grain weight, and in Yeomju 1 for grain yield. By Grafius's model, Pyeongbook 3, Weonsan 66 in early maturing groups and Seohaechalbyeo in medium maturing groups show stable for 3 years. Weonsan 66 in early maturing groups and Seohaechalbyeo in medium maturing groups were found to be highly stable as analyzed by both Finlay and Wilkinson's model and Everhart & Russell's model. With reference to three models, Weonsan 66 was highly stable for 3 years with showing more yield than Odaebyeo in early maturing groups while Seohaechalbyeo was highly stable for 3 years with showing high yield than Hwaseongbyeo in medium maturing groups above $5\;t\;ha^{-1}$ of milled rice respectively.
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문제 정의
However, the reports on yield stabilities about North Korean varieties are rare. The objectives of this study were ⅰ) to determine the range of variability of yield and yield components of North Korea varieties, ⅱ) to estimate the stability related parameters of yield and yield components of North Korea varieties, ⅲ) to identify elite rice germplasms which show more stable in yields.
제안 방법
Statistical analysis was conducted for each character attained based on a randomized, complete-block design with three years as replications for analyzing yearly variation and stability of yield and yield components. GRAFIUS (1956) has studied a theoretical model and presented experimental data for selecting a universal variety.
For measuring number of panicles per hill and panicle length, ten plants per varieties were sampled from each plot. Two representative panicles per plant (a total of 20 panicles per variety) were cut and bagged after panicle emergence to avoid shattering and evaluated for ripened grain ratio. 1,000-grain weight of brown rice was measured on 50 grains per plant (10 plants per line).
대상 데이터
This experiment was conducted at the National Institute of Crop Science, Suwon, Korea. The accessions consisted of 20 varieties, including 18 from North Korea and 2 from South Korea. The tested varieties were cultivated according to the experimental Guidelines of the Rural Development Administration.
This experiment was conducted at the National Institute of Crop Science, Suwon, Korea. The accessions consisted of 20 varieties, including 18 from North Korea and 2 from South Korea.
Three models were used to provide estimates of stability parameters for 18 North Korea varieties including 2 South Korea varieties. With use of Grafius's model, the universal variety can be selected through investigating the balance of yield components such as the number of panicles per hill (X), multiplication number of spikelets per panicle by ripened grain ratio (Y), and 1,000-grain weight of brown rice (Z), which is used to check high yield potentials in various environments.
이론/모형
Test of stability with Eveihart & Russell's model.
Table 3. Yield and Yield component-based parameter expressed as Everhart & RusselVs model.
성능/효과
1%). In ripened grain ratio, the lowest coefficient of variance (2.5%) in all varieties was observed in Pyeongyang 3 (2.5%), then Pyeongbook 3 (2.9%), Haetwig 1 (14.6%) were also higher in early maturing varieties, while Ryongseong 7 (3.5%), Ryongseong 25 (3.5%) in medium maturing group. However, Hwanghae 60 showed the largest coefficient of variance (31.
(2000) also studied the yield stability of newly bred Korean rice varieties using this model. The result of linear regression analysis for varietal yield stability in Fig. 1 showed that Hamnam 29, Pyeong- book 3, etc. were stable over years, and moreover, Weonsan 66 showed yield stability with having more yield than Odaebyeo in early maturing group. Pyeongbook 3, Yeomju 1, and Pyeongyang 10, Pyeongyang 12, etc.
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