Changes in Grain Yield and Yield Attributes Due to Cultivar Development in Indica Inbred Rice in China

Tao, Zui; Zhang, Ruichun; Chen, Jiana; Cao, Fuliang; Liu, Longsheng; Zhang, Ming; Huang, Min

doi:10.3390/agronomy12102541

Cited by 3 publications

(1 citation statement)

References 19 publications

(24 reference statements)

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“…Previous studies on the yield change due to the development of new cultivars in rice generally focus on grain yield [14][15][16], but few on head milled rice yield [9]. The present study compared head milled rice yield between two middle-season hybrid rice cultivars released 18 years apart, i.e., a recently-released cultivar with high eating quality (JLY1468, released in 2017) and an old cultivar with high grain yield (LYPJ, released in 1999) showing a considerable improvement (~30%) in head milled rice yield due to the cultivar development.…”

Section: Discussionmentioning

confidence: 99%

The Improvement in Head Milled Rice Yield in Middle-Season Hybrid Rice: Evidence from a Case Study of Two Cultivars Released 18 Years Apart

et al. 2023

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Head milled rice is the main form of rice for sale and consumption. However, previous studies on the yield change due to the development of new cultivars in rice generally focus on grain yield but few on head milled rice yield. In this study, field experiments were conducted in two years (2019 and 2020) to compare head milled rice yield and associated traits (grain yield, milled recovery traits, and shape and chalkiness traits of rice grains) between two middle-season hybrid rice cultivars released 18 years apart, i.e., Jingliangyou 1468 (JLY1468), a recently-released cultivar with high eating quality, and Liangyoupeijiu (LYPJ), an old cultivar with high grain yield. JLY1468 had higher head milled rice yield than LYPJ by 30% in 2019 and by 33% in 2020. The higher head milled rice yield in JLY1468 than in LYPJ was attributable to improvements in both grain yield, and head milled rice rate (HMRR). The improvement in HMRR in JLY1468 compared to LYPJ was mainly attributable to a reduction in chalkiness degree, which was associated with a decrease in rice grain size. The results of this study provide evidence for the improvement in head milled rice yield in middle-season hybrid rice with the development of new cultivars in recent years.

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Section: Discussionmentioning

confidence: 99%

The Improvement in Head Milled Rice Yield in Middle-Season Hybrid Rice: Evidence from a Case Study of Two Cultivars Released 18 Years Apart

et al. 2023

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Mitigating Antimony Toxicity in Rice (Oryza Sativa L.) Through Exogenous Selenium Supplementation: A Comparative Study of Seed Priming, Hydroponics, and Foliar Spray Methods

Ran,

Lu,

et al. 2023

J Plant Growth Regul

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Improving Rice Yield by Promoting Pre-anathesis Growth in Subtropical Environments

et al. 2023

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Rice yield is greatly influenced by climatic factors and soil fertility in the location where it is grown, but information about the individual effects of climatic factors and soil fertility variables is difficult to distinguish because they are often not independent. The objective of this study was to demonstrate the effect of climatic factors on grain yield when soil fertility was not a confounding factor for explaining yield differences across two subtropical environments. Field and pot experiments with six rice cultivars were conducted in Deyang and Luzhou, Sichuan Province, China. We found that rice yield was higher in Deyang than in Luzhou by 7.0–16.8% for field experiments and by 57.6–87.4% for pot experiments. Biomass production rather than harvest index was responsible for the yield difference. Maximum and minimum temperatures and cumulative solar radiation (CSR) before heading (HD) were higher in Deyang than in Luzhou, whereas after HD, maximum and minimum temperatures were lower in Deyang than in Luzhou. Rice yield was more closely related to maximum and minimum temperatures and CSR before HD than to these parameters after HD. There was no difference in yield between soil types from Deyang and Luzhou within the same ecological condition. Thus, the yield difference between the two subtropical environments was mainly caused by the difference in climatic factors. The differences in biomass between Deyang and Luzhou were mostly due to variations in pre-heading crop growth rate (pre-CGR) and pre-heading radiation use efficiency (pre-RUE), which were induced by varying temperatures and CSR. We concluded that lower yield in Luzhou was associated with lower pre-CGR and pre-RUE. Our study suggests that developing rice cultivars with high pre-CGR and pre-RUE through a breeding program may also be a feasible approach to achieve high yield in subtropical environments.

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Changes in Grain Yield and Yield Attributes Due to Cultivar Development in Indica Inbred Rice in China

Cited by 3 publications

References 19 publications

The Improvement in Head Milled Rice Yield in Middle-Season Hybrid Rice: Evidence from a Case Study of Two Cultivars Released 18 Years Apart

The Improvement in Head Milled Rice Yield in Middle-Season Hybrid Rice: Evidence from a Case Study of Two Cultivars Released 18 Years Apart

Mitigating Antimony Toxicity in Rice (Oryza Sativa L.) Through Exogenous Selenium Supplementation: A Comparative Study of Seed Priming, Hydroponics, and Foliar Spray Methods

Improving Rice Yield by Promoting Pre-anathesis Growth in Subtropical Environments

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