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Chinese Agricultural Science Bulletin ›› 2025, Vol. 41 ›› Issue (12): 9-18.doi: 10.11924/j.issn.1000-6850.casb2024-0432

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Adaptation Evaluation and Screening of 12 Conventional Indica Rice Varieties in Wenshan Prefecture

LI Jian1(), WANG Dingkai1, XIONG Jianyun1, WANG Tianming1, WEI Kangbi1, WANG Wenxin1, WEI Dongmei2, LI Yun1()   

  1. 1 Wenshan Academy of Agricultural Sciences, Wenshan, Yunnan 663099
    2 Wenshan Ecological and Environmental Monitoring Station of Department of Ecology and Environment of Yunnan, Wenshan, Yunnan 663099
  • Received:2024-06-28 Revised:2024-10-15 Online:2025-04-25 Published:2025-04-24

Abstract:

This experiment aimed to select high-quality conventional indica rice varieties which are suitable for planting in Wenshan Prefecture, and to improve rice planting efficiency. Using 12 conventional indica rice varieties selected from 9 breeding units in Yunnan Province as experimental materials, 18 indicators including growth period, main agronomic traits, disease resistance, quality and yield were measured, and the correlation analysis and principal component analysis methods were used for comprehensive evaluation. The results showed that all 12 rice varieties tested could mature normally in the local area. The varieties with better main agronomic traits included 'Wendao 33', 'Nanjing Xiangzhan', and 'Sandao 16'. The average yield of 12 varieties was 8619.52 kg/hm2, among which 'Hongdao 12' (9653.5 kg/hm2), 'Zhongke Jinghao' (9501.4 kg/hm2) and 'Caihe 17' (9312.8 kg/hm2) had the highest yield, with the increase of 13.37%, 11.58% and 9.37% respectively compared to CK. The variety with best rice quality was 'Wendao 33', and its rice quality met the national first-class high-quality rice standard. The correlation analysis showed that filled spikelets per panicle was significantly positively correlated with head rice rate; plant height and spike length were significantly negatively correlated with amylose content; thousand kernels weight was significantly positively correlated with the chalky grain rate and gel consistency, and was significantly negatively correlated with amylose content. 14 main indexes were simplified into 5 principal components by principal component analysis, and the cumulative contribution rate reached 86.956%, which basically reflected most of information carried by the original data of 12 varieties. Through comprehensive analysis and evaluation, the comprehensive performance of 'Hongdao 12', 'Sandao 16', 'Jinxian 168' and 'Wendao 33' was relatively outstanding. These research results can provide reference for the breeding and promotion of high-quality conventional indica rice varieties in Wenshan Prefecture.

Key words: indica rice, agronomic traits, yield, disease resistance, rice quality, correlation analysis, principal component analysis, comprehensive evaluation