Prediction method of yield stability of hybrid round-grained nonglutinous rice combinations
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A technology for stability prediction and hybrid japonica rice, applied in the direction of botanical equipment and methods, application, plant gene improvement, etc., to achieve the effect of comprehensive agronomic traits, high yield, and reduce the work of multi-point identification
Active Publication Date: 2018-10-16
SHANGHAI ACAD OF AGRI SCI
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However, the methods for predicting the yield stability of hybrid japonica rice combinations have not been reported yet.
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Embodiment 1
[0026] A prediction method and application of yield stability of a new combination of hybrid japonica rice:
[0027] In the winter of 2014, 9 newly selected japonica rice restorer lines and 4 BT-type japonica rice sterile lines were used to prepare 36 hybrid combinations according to the NCⅡ genetic mating design in Sanya, Hainan. The 9 restorer lines are: Shenfan 24, Shenhui 26, Shenhui 415, C67, Shenfan 17, AC413, AC472, Shenfan 31 and Shenfan 32. The 4 CMS lines are: Shenwu 1A, Shen 01A, Shen 9A and Zixiang A.
[0028] In 2015, 36 hybrid combinations prepared in Hainan in the winter of 2014 were planted at the Zhuanghang Comprehensive Experimental Station of the Shanghai Academy of Agricultural Sciences. They were sown on May 20 and transplanted on June 17. 14 rows were planted in each plot, with 17 plants in each row. The row spacing is 13.3cm×20.0cm, and the plot area is 5.45m 2 , a random block group with 3 repetitions. There are protective rows around, and the conven...
Embodiment 2
[0037] In order to verify the accuracy of this method, in 2015, while carrying out the yield stability prediction test of the new hybrid japonica rice combination, 9 hybrid combinations were selected and sent to 8 test points for multi-point identification (Table 3). The 9 hybrid combinations are: Shenwu 1A / Shenfan 24, Shen9A / Shenhui 26, Shen9A / Shenhui 415, Shen9A / Shenfan 31, Shen9A / Shenfan 32, Shenwu 1A / Shenfan 17 , Shen 9A / Shen Fan 17, Zixiang A / Shen Fan 17 and Shen Wu 1A / AC472. The 8 test points are: Shanghai Pandian, Shanghai Yuejin, Shanghai Shangshi, Shanghai Zhuanghang, Shanghai Zhuqiao, Zhejiang Quzhou , Nanjing, Jiangsu and Hefei, Anhui. The high-yield and high-quality hybrid japonica rice combination Huayou 14 was used as the control. The yield stability of the new combination of hybrid japonica rice was measured by the coefficient of variation of yield in multi-point identification. The smaller the coefficient of variation, the smaller the variation of the combina...
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Abstract
The invention relates to a prediction method of yield stability of hybrid round-grained nonglutinous rice combinations. The prediction method of the yield stability of the hybrid round-grained nonglutinous rice combinations comprises the following steps: preparing hybrid combinations by utilizing selected round-grained nonglutinous rice restorerlines and BT-type round-grained nonglutinous rice sterility lines by adopting an incomplete diallel-cross genetic mating design; performing field planting and character investigation on the prepared hybrid combinations, and carrying out small-area yieldtesting when the hybrid round-grained nonglutinous rice combinations are ripe; carrying out combining ability analysis so as to figure out special combining ability of the hybrid combinations, and carrying out yield stability prediction on the hybrid round-grained nonglutinous rice combinations by utilizing relative effects of the special combining ability; and then, screening out a hybrid round-grained nonglutinous rice combination with high yield, good quality, stable yield and excellent comprehensive agronomic traits by performing evaluation on comprehensive performance of yield, quality and comprehensive agronomic traits. The prediction method of the yield stability of the hybrid round-grained nonglutinous rice combinations is capable of improving selection efficiency of the hybrid round-grained nonglutinous rice combinations with excellent stability, shortening years of breeding, and accelerating promotion of novel hybrid round-grained nonglutinous rice combinations with high yield, good quality and excellent stability.
Description
technical field [0001] The invention relates to the technical field of crop breeding, in particular to a method for predicting yield stability of hybrid japonica rice combinations. Background technique [0002] Rice is the main food crop in my country and plays an important role in ensuring national food security. The promotion and application of hybrid rice has made great contributions to the food production in my country and the world. At present, the planting area of hybrid rice in my country accounts for 53% of the total area of rice, but the planting area of hybrid japonica rice can only account for 3% to 5% of the planting area of japonica rice. Although hybrid japonica rice and hybrid indica rice achieved three-line matching almost at the same time, compared with hybrid indica rice, hybrid japonica rice developed slowly. Heterosis is a common phenomenon in the biological world. Hybrid japonica rice has the same heterosis as hybrid indica rice. Moreover, hybr...
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