Grain yield and nitrogen use efficiency responses to N application in Bt (Cry1Ab/Ac) transgenic two-line hybrid rice

Jian, Zaiping; Wang, Fei; Li, Zhongzheng; Chen, Yutiao; Ma, Xiaochun; Nie, Lei; Cui, Kehui; Peng, Shaobing; Lin, Yongjun; Song, Hongzhi; Li, Yong; Huang, Jikun

doi:10.1016/j.fcr.2013.09.007

Cited by 17 publications

(20 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Previous field studies have shown that the NHI in rice declined with increasing N rates, and that additional nutrients were intercepted by the straw (Chen et al 2014; Jian et al 2014); similar results were also observed in our experiments (Fig. 2).…”

Section: Discussionsupporting

confidence: 92%

Effects of nitrogen and tiller type on grain yield and physiological responses in rice

et al. 2017

View full text Add to dashboard Cite

Tillering is an important agronomic trait for rice population quality and grain production. Nitrogen fertilizer application increased the number of rice tillers, but not every tiller contributes equally to the overall yield. Heterogeneity in tiller yield of rice increased with increasing nitrogen levels. Typically, late emerging tillers contributed less to the grain yield. Under high nitrogen conditions, most of the nutrients were retained in the straw of late emerging tillers; these tillers have high transport efficiency in vascular bundles, but there is less time for nutrients to transport into the grain. Despite the high light intensity, less than half of the light is used for photosynthesis in late emerging tillers. The low activity of enzymes related to grain filling in late emerging tillers is another reason for low yield.

show abstract

Section: Discussionsupporting

confidence: 92%

Effects of nitrogen and tiller type on grain yield and physiological responses in rice

et al. 2017

View full text Add to dashboard Cite

show abstract

“…During the past 20 years, numerous insect resistance genes have been identified, some of which have anti-lepidopteron activity ( cry1Aa, cry1Ab, cry1Ac, cry1Ab/Ac, cry1C, cry2A , and CpT1 ), whereas others exhibit anti-helipterum activity ( Galanthus nivalis agglutinin, gna , and Pinellia ternata agglutinin, pta ). These genes have been introduced into rice to develop insect-resistant transgenic lines (Shu et al, 1998, 2000; Tan et al, 2011; Wang et al, 2012a,b; Jiang et al, 2013b; Jian et al, 2014). Currently, most insect-resistant transgenic rice lines in China are in the field trial stage (Tang et al, 2006; Wang et al, 2012a,b).…”

Section: Introductionmentioning

confidence: 99%

“…Another potential problem associated with the use of these crops is a possible change in the fitness of Bt transgenic rice under various environmental conditions, as reported by several studies (Wang et al, 2012a,b; Jiang et al, 2013b; Li et al, 2013; Jian et al, 2014). In particular, different insect pressure conditions vary in terms of their fitness effects on vegetative and reproductive growth abilities of transgenic rice.…”

Section: Introductionmentioning

confidence: 99%

Fitness Cost of Transgenic cry1Ab/c Rice Under Saline-Alkaline Soil Condition

Song

Liu

et al. 2018

Front. Plant Sci.

View full text Add to dashboard Cite

The environmental release and biosafety of transgenic Bt crops have attracted global attention. China has a large area of saline-alkali land, which is ideal for large-scale production of Bt transgenic rice. Therefore an understanding of the fitness of Bt transgenic rice in saline-alkaline soils and the ability to predict its long-term environmental effects are important for the future sustainable use of these crops. In the present study, we aimed to evaluate the fitness of cry1Ab/c transgenic rice in both farmland and natural ecosystems. Transgenic cry1Ab/c rice Huahui1, for which a national biosafety certificate was obtained, was grown on normal farmland and saline-alkaline soils in a glass greenhouse. The expression pattern of exogenous Cry1Ab/c protein, and vegetative and reproductive fitness of rice were assessed. The expression of the exogenous Cry1Ab/c protein in the transgenic rice grown on saline-alkaline soil was lower than that in the strain grown on farmland soil. Under both the soil conditions, vegetative growth abilities, as evaluated by tiller number and biomass, and reproductive growth abilities, as measured by filled grain number and filled grain weight per plant, showed a significantly higher fitness cost for Huahui1 than that for the parental rice Minghui63 grown under the same soil conditions. In saline-alkaline soil, the fitness cost of Huahui1was moderately higher than that of Minghui63. Therefore, the ecological risk of cry1Ab/c transgenic rice is not expected to be higher than that of parental rice Minghui63 if the former escapes into natural saline-alkaline soil. The results of the present study provide a scientific basis to improve environmental safety assessment of the insect-resistant transgenic rice strain Huahui1 before commercialization.

show abstract

“…Since Cry1Ab was first introduced into a japonica rice variety, many Bt genes have been found, and only a few of them were selected for developing transgenic crops [60]. Because deploying two or more Bt genes in one rice variety can delay the emergence of pest resistance [64,74], scientists started to develop Bt hybrid rice lines with Cry1Ab/Cry1Ac into various rice plants which have both high grain yield and good grain quality [65].…”

Section: Bacillus Thuringiensis Development On Rice Cropsmentioning

confidence: 99%

Toxic Potential ofBacillus thuringiensis: An Overview

Fernández-Chapa¹,

Ramírez-Villalobos²,

Galán-Wong³

2019

Protecting Rice Grains in the Post-Genomic Era

View full text Add to dashboard Cite

The toxins of Bacillus thuringiensis (Bt) have shown great potential in the control of harmful insects affecting human health and agriculture, used as the main biological agent for the formulation of bioinsecticides due to its specificity to target different insects' orders. This has led Bt-based products to become the best-selling biological insecticides in the world since the genes encoding insecticidal proteins have been successfully used in novel insecticidal formulation, genetically engineered (GE) crops, and development of transgenic rice that produce insecticidal toxins derived from Bacillus thuringiensis. It has been proven that insecticidal activity of Bt protein crystals can prolong their toxicity in shelf life or field under specific conditions, and this can improve the use of special strains and formulations to control insect vectors of diseases. Bt toxins have shown well-documented toxicity against lepidopterans, coleopterans, hemipterans, dipterans, nematodes, Rhabditida and human cancer cells of various origins. These crystal toxins may be responsible for other novel biological properties suggesting a pluripotential nature with different specificities.

show abstract

Grain yield and nitrogen use efficiency responses to N application in Bt (Cry1Ab/Ac) transgenic two-line hybrid rice

Cited by 17 publications

References 26 publications

Effects of nitrogen and tiller type on grain yield and physiological responses in rice

Effects of nitrogen and tiller type on grain yield and physiological responses in rice

Fitness Cost of Transgenic cry1Ab/c Rice Under Saline-Alkaline Soil Condition

Toxic Potential ofBacillus thuringiensis: An Overview

Contact Info

Product

Resources

About