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Association Analysis of Agronomic and Quality Traits with Starch Properties and Screening of Low-GI Candidate Rice Varieties
GUOTao, HUJuan, XUHongbin, ZHANGLi, LIJianwei, WANGBin
Chin Agric Sci Bull ›› 2026, Vol. 42 ›› Issue (21) : 61-68.
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Abbreviation (ISO4): Chin Agric Sci Bull
Editor in chief: Yulong YIN
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Association Analysis of Agronomic and Quality Traits with Starch Properties and Screening of Low-GI Candidate Rice Varieties
To explore the influence of agronomic and quality traits on the glycemic index (GI) of rice and to screen ideal parents with low-GI breeding potential, field experiments and laboratory determinations were conducted to analyze the differences in rice agronomic, quality traits and starch characteristics and their correlations with GI using thirteen rice varieties as experimental materials. The results showed that potential positive correlation was observed between amylose content and basic seedling density (r=0.524, P=0.066), and resistant starch content was significantly positively correlated with brown rice rate (r=0.568, P<0.05). Based on agronomic traits, starch characteristics and quality indicators, two varieties, ‘Zhongzao 88’ and ‘Zaoxian 617’ were selected. ‘Zhongzao 88’ had the highest resistant starch content (7.94%), a relatively high amylose content (24.91%), and a high brown rice rate; ‘Zaoxian 617’ had the second highest amylose content (31.03%) and good stability, with a high and stable yield (10.4 kg/13.3 m²). Based on the above research, two low-GI candidate parent lines were successfully screened, laying a foundation for local low-GI rice breeding.
rice / Glycemic Index (GI) / agronomic traits / quality traits / amylose / resistant starch / variety screening
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