Performance of super hybrid rice cultivars grown under no-tillage and direct seeding

Huang, Min; Zou, Yingbin; Jiang, Peng; Xia, Bing; Xiao, Anmin

doi:10.1590/s0103-90162012000200003

Cited by 11 publications

(9 citation statements)

References 21 publications

(18 reference statements)

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“…On the basis of phenotypic performance, high heritability estimates have been proved to be fruitful in the selection of superior genotypes. CGR was critical for biomass production by the super hybrid rice (Huang et al ). It was suggested that a higher CGR (higher biomass production) during the late reproductive period might be prerequisite to attain a higher grain yield (Takai et al ).…”

Section: Discussionmentioning

confidence: 99%

“…Three-dimensional plot of PCA indicating pattern of relationships among 41 rice genotypes and supporting the cluster analysis mostly based on ISSR markers analysis and their sources of collection (G1 = IRBB2, G2 = IRBB4, G3 = IRBB5, G4 = IRBB7, G5 = IRBB10, G6 = IRBB11, G7 = IRBB13, G8 = IRBB14, G9 = IRBB21, G10 = IRBB54, G11 = IRBB55, G12 = IRBB57, G13 = IRBB58, G14 = IRBB59, G15 = IRBB60, G16 = IRBB61, G17 = IRBB64, G18 = IRBB65, G19 = IRBB66, G20 = MR84, G21 = MR159, G22 = MR185, G23 = MR211, G24 = MR 219, G25 = MR220, G26 = MR232, G27 = MR253, G28 = MR 263, G29 = MR269, G30 = MR220-CL1, G31 = MR220-CL2, G32 = MRQ50, G33 = MRQ74, G34 = PH9, G35 = Pulut Siding, G36 = IR8, G37 = YTM16, G38 = Bahagia, G39 = BR28, G40 = BR29, G41 = Purbachi). hybrid rice (Huang et al 2012). It was suggested that a higher CGR (higher biomass production) during the late reproductive period might be prerequisite to attain a higher grain yield (Takai et al 2006).…”

Section: Discussionmentioning

confidence: 99%

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Genetic variation, heritability, divergence and biomass accumulation of rice genotypes resistant to bacterial blight revealed by quantitative traits and ISSR markers

Mazid

Rafii

Hanafi

et al. 2013

Physiologia Plantarum

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A field experiment was carried out in order to evaluate genetic diversity of 41 rice genotypes using physiological traits and molecular markers. All the genotypes unveiled variations for crop growth rate (CGR), relative growth rate (RGR), net assimilation rate (NAR), yield per hill (Yhill(-1)), total dry matter (TDM), harvest index (HI), photosynthetic rate (PR), leaf area index (LAI), chlorophyll-a and chlorophyll-b at maximum tillering stage. The CGR values varied from 0.23 to 0.76 gm cm(-2) day(-1). The Yhill(-1) ranged from 15.91 to 92.26 g, while TDM value was in the range of 7.49 to 20.45 g hill(-1). PR was found to vary from 9.40 to 22.34 µmol m(-2) s(-1). PR expressed positive relation with Yhill(-1). Significant positive relation was found between CGR and TDM (r = 0.61**), NAR and CGR (r = 0.62**) and between TDM and NAR (r = 0.31**). High heritability was found in RGR and Yhill(-1). Cluster analysis based on the traits grouped 41 rice genotypes into seven clusters. A total of 310 polymorphic loci were detected across the 20 inter-simple sequence repeats (ISSR) markers. The UPGMA dendrogram grouped 41 rice genotypes into 11 clusters including several sub-clusters. The Mantel test revealed positive correlation between quantitative traits and molecular markers (r = 0.41). On the basis of quantitative traits and molecular marker analyses parental genotypes, IRBB54 with MR84, IRBB60 with MR84, Purbachi with MR263, IRBB65 with BR29, IRBB65 with Pulut Siding and MRQ74 with Purbachi could be hybridized for future breeding program.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Genetic variation, heritability, divergence and biomass accumulation of rice genotypes resistant to bacterial blight revealed by quantitative traits and ISSR markers

Mazid

Rafii

Hanafi

et al. 2013

Physiologia Plantarum

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“…In contrast, very few studies have compared the relative effects of combining high planting density with reduced nitrogen application rate on yield and NUE in inbred and hybrid varieties simultaneously. Super hybrid cultivars have high yield potential associated with a relatively larger number of spikelets per panicle and higher biomass production than inbred rice cultivars [20][21][22] . Thus, for example, Zhang et al 20 observed that super hybrid varieties had 12% higher yield potential than ordinary hybrid and inbred varieties.…”

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confidence: 99%

Inbred varieties outperformed hybrid rice varieties under dense planting with reducing nitrogen

Lü

Wang

Chu

et al. 2020

Sci Rep

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Field experiments were conducted over two years to evaluate the effects of planting density and nitrogen input rate on grain yield and nitrogen use efficiency (NUE) of inbred and hybrid rice varieties. A significant interaction effect was observed between nitrogen input and planting density on grain yield. Higher number of panicles per square meter and spikelets per panicle largely accounted for the observed advantage in performance of inbred, relative to hybrid varieties. Compared with high nitrogen input rate, nitrogen absorption efficiency, nitrogen recovery efficiency, and partial factor productivity increased by 24.6%, 28.0%, and 33.3% in inbred varieties, and by 32.2%, 29.3%, and 35.0% in hybrids under low nitrogen input, respectively. Inbred varieties showed higher nitrogen absorption efficiency, nitrogen recovery efficiency, and partial factor productivity than hybrids, regardless of nitrogen input level. Nitrogen correlated positively with panicle number, spikelets per panicle, biomass production at flowering, and after flowering in inbred varieties but only with panicle number and biomass production at flowering in hybrids. Inbred varieties are more suitable for high planting density at reduced nitrogen input regarding higher grain yield and NUE. These findings bear important implications for achieving high yield and high efficiency in nutrient uptake and utilization in modern rice-production systems. Rice (Oryza sativa L.) is the main staple food for more than half the population of the world 1. As one of the largest rice producers and consumers, China occupied 18.8% of the global rice-growing area and accounted for 28.1% of the total production in 2014 2. Double-season rice cropping has significantly contributed to the increase in rice productivity in China; however, the cultivated area has decreased substantially due to labor migration and increased labor costs over the past decades 3. Therefore, it is necessary to develop labor-saving cultivation technologies to reverse the declining trend in rice cultivation area in this country. Mechanical transplanting is an alternative labor-saving technology in rice production 4. As efficient agriculture has been popularized in recent years, mechanical transplanting has been rapidly adopted for rice production in China 5. However, rice farmers still follow traditional field management practices even under the mechanical-transplanting production scheme 6. Previous studies confirmed that certain traditional management practices, such as nitrogen (N) fertilization utilize resources inefficiently and have negative environmental impacts 7,8. In China, the average N application rate for rice production is 180 kg ha −1 , which is 75% higher than the global average 9-11. Consequently, only 20-30% of applied N is actually absorbed by the crop, while most of it is lost to the environment 6. Over the past three decades, this N-fertilizer overuse in China has caused surface water eutrophication, soil acidification, increased greenhouse gas emissions, and enhanced N deposit...

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“…However, due to the request of minimizing the expense of environmental quality, closing yield gap between the actual yield and the potential should be our first priority [ 5 , 21 , 22 , 49 ]. Technology such as development of high-yield cultivars through targeted plant breeding and also the high-yield management practices have brought profound yield increase that does result in low yield gaps in China [ 3 , 46 , 50 , 51 ]. Such low yield gaps have been indicated by rice in eastern, central and southern China, wheat in eastern China and maize in central and northeastern China [ 8 , 9 , 48 ].…”

Section: Discussionmentioning

confidence: 99%

Is Yield Increase Sufficient to Achieve Food Security in China?

et al. 2015

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Increasing demand for food, driven by unprecedented population growth and increasing consumption, will keep challenging food security in China. Although cereal yields have substantially improved during the last three decades, whether it will keep thriving to meet the increasing demand is not known yet. Thus, an integrated analysis on the trends of crop yield and cultivated area is essential to better understand current state of food security in China, especially on county scale. So far, yield stagnation has extensively dominated the main cereal-growing areas across China. Rice yield is facing the most severe stagnation that 53.9% counties tracked in the study have stagnated significantly, followed by maize (42.4%) and wheat (41.9%). As another important element for production sustainability, but often neglected is the planted area patterns. It has been further demonstrated that the loss in productive arable land for rice and wheat have dramatically increased the pressure on achieving food security. Not only a great deal of the planted areas have stagnated since 1980, but also collapsed. 48.4% and 54.4% of rice- and wheat-growing counties have lost their cropland areas to varying degrees. Besides, 27.6% and 35.8% of them have retrograded below the level of the 1980s. The combined influence (both loss in yield and area) has determined the crop sustainable production in China to be pessimistic for rice and wheat, and consequently no surprise to find that more than half of counties rank a lower level of production sustainability. Therefore, given the potential yield increase in wheat and maize, as well as substantial area loss of rice and wheat, the possible targeted adaptation measures for both yield and cropping area is required at county scale. Moreover, policies on food trade, alongside advocation of low calorie diets, reducing food loss and waste can help to enhance food security.

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Performance of super hybrid rice cultivars grown under no-tillage and direct seeding

Abstract: which resulted from higher biomass production. Crop growth rate after HD was critical for biomass production by the super hybrid rice. We suggest that increasing the crop growth rate after HD is an effective approach to increase grain yield of super hybrid rice under NTDS.

Cited by 11 publications

References 21 publications

Genetic variation, heritability, divergence and biomass accumulation of rice genotypes resistant to bacterial blight revealed by quantitative traits and ISSR markers

Genetic variation, heritability, divergence and biomass accumulation of rice genotypes resistant to bacterial blight revealed by quantitative traits and ISSR markers

Inbred varieties outperformed hybrid rice varieties under dense planting with reducing nitrogen

Is Yield Increase Sufficient to Achieve Food Security in China?

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