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John E. Sheehy
International Rice Research Institute
44Publications
20H-index
3,857Citations
Publications 44
Newest
#1P.L. Mitchell (University of Sheffield)H-Index: 10
#2John E. Sheehy (IRRI: International Rice Research Institute)H-Index: 20
Abstract Given the need for increased yields in wheat, new cultivars will be wanted with higher potential yield (in optimal physical environment, without weeds, pests or diseases). The aim in the United Kingdom is 20 t ha −1 . Potential yield can be predicted from the annual total solar radiation incident on the crop, the fraction of incident photosynthetically active radiation (PAR) which is intercepted, radiation use efficiency (RUE), and harvest index. The potential yield of current crops (in...
#1Aryo B. FeldmanH-Index: 2
#2LeungHei (IRRI: International Rice Research Institute)H-Index: 39
Last.Erik H. Murchie (University of Nottingham)H-Index: 23
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Improvements to leaf photosynthetic rates of crops can be achieved by targeted manipulation of individual component processes, such as the activity and properties of RuBisCO or photoprotection. This study shows that simple forward genetic screens of mutant populations can also be used to rapidly generate photosynthesis variants that are useful for breeding. Increasing leaf vein density (concentration of vascular tissue per unit leaf area) has important implications for plant hydraulic properties...
#1Govinda RizalH-Index: 6
#2Shanta KarkiH-Index: 7
Last.William Paul QuickH-Index: 18
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Recent efforts to engineer C4 photosynthetic traits into C3 plants such as rice demand an understanding of the genetic elements that enable C4 plants to outperform C3 plants. As a part of the C4 Rice Consortium’s efforts to identify genes needed to support C4 photosynthesis, EMS mutagenized sorghum populations were generated and screened to identify genes that cause a loss of C4 function. Stable carbon isotope ratio (δ13C) of leaf dry matter has been used to distinguishspecies with C3 and C4 pho...
#1Govinda Rizal (IRRI: International Rice Research Institute)H-Index: 6
#2Vivek Thakur (IRRI: International Rice Research Institute)H-Index: 6
Last.Florencia Montecillo (IRRI: International Rice Research Institute)H-Index: 4
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Summary The specification of vascular patterning in plants has interested plant biologists for many years. In the last decade a new context has emerged for this interest. Specifically, recent proposals to engineer C4 traits into C3 plants such as rice require an understanding of how the distinctive venation pattern in the leaves of C4 plants is determined. High vein density with Kranz anatomy, whereby photosynthetic cells are arranged in encircling layers around vascular bundles, is one of the m...
#1John E. SheehyH-Index: 20
#2P.L. Mitchell (University of Sheffield)H-Index: 10
Abstract Simple quantitative relationships can be useful in highlighting the characteristics that are key to taking yield towards its theoretical limit. Likewise, calculating maximum yields can be useful in suggesting attainable goals for plant breeders and agronomists. For this purpose we define how the core physiological drivers of yield combine to produce maximum yield. We make simplifications to produce three main equations that trace yield from solar energy through crop photosynthesis and b...
#1Daisuke Fujita (IRRI: International Rice Research Institute)H-Index: 12
#2Leodegario A. Ebron (IRRI: International Rice Research Institute)H-Index: 10
Last.Nobuya Kobayashi (IRRI: International Rice Research Institute)H-Index: 15
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Tillering is one of the most important agronomic traits related to grain production in rice (Oryza sativa L.). A japonica-type variety, Aikawa 1, is known to have low-tiller number. The detailed location of a low-tillering gene, Ltn, which has been localized on chromosome 8 in Aikawa 1, was confirmed by molecular mapping. Using BC 5 F 2 individuals derived from a cross between IR64 and Aikawa 1, the low-tillering gene was mapped to an interval defined by SSR markers ssr5816-3 and A4765. This was...
#1Robert T. Furbank (CSIRO: Commonwealth Scientific and Industrial Research Organisation)H-Index: 53
#2Susanne von Caemmerer (ANU: Australian National University)H-Index: 56
Last.Gerald E. Edwards (WSU: Washington State University)H-Index: 57
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There is now strong evidence that yield potential in rice (Oryza sativa L.) is becoming limited by ‘source’ capacity, i.e. photosynthetic capacity or efficiency, and hence the ability to fill the large number of grain ‘sinks’ produced in modern varieties. One solution to this problem is to introduce a more efficient, higher capacity photosynthetic mechanism to rice, the C4 pathway. A major challenge is identifying and engineering the genes necessary to install C4 photosynthesis in rice. Recently...
#1John E. Sheehy (IRRI: International Rice Research Institute)H-Index: 20
#2D. Gunawardana (IRRI: International Rice Research Institute)H-Index: 1
Last.P.L. Mitchell (University of Sheffield)H-Index: 10
view all 6 authors...
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