Characterization of functional trait diversity among Indian cultivated and weedy rice populations

Rathore, Meenal; Singh, R. P.; Kumar, Bhumesh; Chauhan, Bhagirath Singh

doi:10.1038/srep24176

Cited by 26 publications

(20 citation statements)

References 27 publications

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“…According to one estimate, DSR is practiced in about 15% of rice-planting areas in China (Yao 2012). It is thought that 3 million hectares of Chinese rice fields have been infested with weedy rice, leading to a yield loss of about 3.4 million tonnes per year (Rathore et al 2016). Sun et al (2013) reported that weedy rice has infested approximately 600,000 ha of rice-growing fields in Northeast China.…”

Section: Introductionmentioning

confidence: 99%

Weedy rice in sustainable rice production. A review

Nadir

Xiong

Zhu

et al. 2017

Agron. Sustain. Dev.

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Weedy rice refers to the unwanted plants of the genus Oryza that have some undesirable agronomic traits and pose a major threat to sustainable rice production worldwide. Widespread adoption of direct seeded rice and hybridization or gene flow between cultivated rice and their wild relatives has resulted in the creation and dissemination of weedy rice. Currently, weedy rice (Oryza sativa f. spontanea) has become one of the most common weeds infesting rice fields worldwide. In this paper, we review the biology, physiology, evolution, and genetic features of weedy rice. We also discuss the major obstacles in weedy rice management, including high diversity of weedy rice, ecological impacts of gene flow on weedy rice, changing climate, and weedy rice management. We then present a framework for the sustainable management and utilization of weedy rice. Our main emphasis is to explore the reservoir of natural variations in weedy germplasm and to utilize them for crop improvement. This review outlines some of the latest biotechnological tools to dissect the genetic backgrounds of several favorable traits of weedy rice that may prove beneficial for breeding and evolutionary studies on cultivated rice. We suggest that by merging the disciplines of genomics, breeding, and weed management, we can achieve the goal of sustainable rice production.

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Section: Introductionmentioning

confidence: 99%

Weedy rice in sustainable rice production. A review

Nadir

Xiong

Zhu

et al. 2017

Agron. Sustain. Dev.

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“…The present study revealed significant variations in different traits among the weedy rice accessions and Swarna rice. Other studies on diversity of Indian weedy rice populations suggested that notable variations amongst the functional traits of weedy rices and that morphotypes do not distribute based on agro-climatic zones (Rathore et al, 2016). This manuscript highlights the extent of Swarna yield penalty when competing with weedy rice.…”

Section: Discussionmentioning

confidence: 70%

Performance of cultivated indica rice (Oryza Sativa L.) as affected by weedy rice

et al. 2019

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Weedy rice species exhibit differential competitive ability and cause significant losses to rice yield. The present study was conducted to evaluate the competing ability of weedy rice accessions collected from foothills of eastern Himalayas and coastal Odisha grown in the presence of cultivated indica rice var. Swarna. The competitive ability of Swarna and weedy rices were estimated on the basis of (i) Swarna yield reduction under different durations of competition with weedy rice; and (ii) nutrient uptake by Swarna and weedy rice in competitive environment. There was significant yield reduction (18%) when competition was allowed until 6 weeks after emergence (WAE) compared to competition until 2 WAE, which was due to vigorous growth of weedy rice at early vegetative stage. The biomass accumulation and tiller number of weedy rice were significantly higher compared to Swarna. Odisha weedy rice accession recorded about 18, 57 and 24% higher N, P and K uptake, respectively, than Swarna. The highest yield reduction (22%) in Swarna was recorded when grown with OA1 and the lowest impact (7.7%) was recorded with AA2. As conclusion, management practices should be implemented within 2–4 weeks of emergence considering 5–10% acceptable yield loss of Swarna, and grain yield of cultivated rice was reduced significantly by high N and K uptake by weedy rice under a competitive environment.

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“…An alternative and efficient strategy would be exploiting the photosynthetic variations within rice system itself, including cultivated and wild rice. There had been a few studies highlighting the photosynthetic differences within cultivated, and among cultivated and wild rice accessions (Kiran et al ., 2013; Kondamudi et al ., 2016; Rathore et al ., 2016; Haritha et al ., 2017; Sung et al ., 2017). In this study, we not only quantified leaf photosynthetic differences across cultivated and wild rice accessions, but also identified the underlying anatomical, biochemical, and photochemical traits mediating higher leaf photosynthesis in rice.…”

Section: Discussionmentioning

confidence: 99%

High photosynthesis rate in the selected wild rice is driven by leaf anatomy mediating high Rubisco activity and electron transport rate

Mathan

Singh

Jathar

et al. 2019

Preprint

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10The importance of increasing photosynthetic efficiency for sustainable crop yield 11 increases to feed the growing world population is well recognized. The natural genetic 12 variation for leaf photosynthesis in crop plants is an overlooked and untapped resource. The 13 genus Oryza, including cultivated rice and wild relatives, offers tremendous genetic 14 variability to explore photosynthetic differences, and underlying developmental, 15 photochemical, and biochemical basis. We quantified leaf photosynthesis and related 16 physiological parameters for ten cultivated and wild rice genotypes to identify 17 photosynthetically efficient wild rice species. Wild rice species with high leaf photosynthesis 18 per unit area had striking anatomical features, such as larger mesophyll cells with more 19 chloroplasts, larger and closer veins, and a smaller number of mesophyll cells between two 20 consecutive veins. In addition, photosynthetically efficient wild rice species showed an 21 efficient Photosystem II as well as higher carboxylation activity of Rubisco compared to less 22 efficient cultivated varieties, such as IR 64. Our results show the existence of desirable 23 variations in mesophyll and vein features, Photosystem II efficiency, and Rubisco activity in 24 the rice system itself that could possibly be targeted for higher leaf photosynthesis. Detailed 25 genetic and molecular understanding of these traits shall be instrumental in increasing 26 photosynthetic efficiency of cultivated rice. 27 28

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Characterization of functional trait diversity among Indian cultivated and weedy rice populations

Cited by 26 publications

References 27 publications

Weedy rice in sustainable rice production. A review

Weedy rice in sustainable rice production. A review

Performance of cultivated indica rice (Oryza Sativa L.) as affected by weedy rice

High photosynthesis rate in the selected wild rice is driven by leaf anatomy mediating high Rubisco activity and electron transport rate

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