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Heterotic Effect, Combining Ability and Significance of synthetics over Line Cultivars in Faba Bean (<i>Vicia faba</i>L.) Grown under Semi-Arid Zones

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American Journal of Plant Sciences 2018年第13期9卷 2684-2695页

作者： Seif M. Gasim Alam E. Mohamed Department of Agronomy Faculty of Agriculture University of Khartoum Shambat Sudan Department of Agronomy Faculty of Agriculture University of Zalingei Zalingei Sudan

The aim of this study was to investigate the amount of heterosis and performance of faba bean synthetic cultivars compared to line cultivars under semi-arid conditions. Five inbred lines in at least S6 generation were developed and used to develop F1s hybrid (in all possible combination excluding reciprocal), lines mixtures (Syn-0) and synthetic generations of Syn-1. Evaluation of the entries showed the lines to have high general and specific combining ability, high yield and high average degree of cross-fertilization (0.36);hetrosis relative to mid-parent for yield was 67%. Lines mixture from four inbred lines (Hudeiba/93, Bassabier, Ed-Damar and Shabah) gave the highest yield of 3.40 t/ha for Syn-0 and 3.96 t/ha for Syn-1. Compared to the average yield t/ha of the pure stand of the four lines (3.11 t/ha), the increase in yield of was 9% in sy-0 and 27% in Syn-1. Compared to the individual yield t/ha of the pure stand of the lines, the performance of Syn-0 surpassed that of the individual pure stands of the linesby 14% for Hudiaba/93 and Bassabier and 4% for Ed-Damar and 7% for Shabah, whereas the increase in performance of Syn-1 compared to pure stand of the lines was 32%, 25% and 21%, respectively. The results confirm the previous knowledge on yield increase with successive syn-generations in faba bean due to the effects of heterogeneity and heterozygosity. Such results could be used as a base for an effective breeding program for improvement of yield of faba bean grown under the semi-arid zones.

关键词： Hetrosis synthetics Faba Bean Yield Arid-Zone

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The Changing Face of synthetics in the Diamond Industry-Recent Developments and Reliable Identification

The Changing Face of Synthetics in the Diamond Industry-Rece...

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2011中国珠宝首饰学术交流会

作者： David Fisher De Beers UK Ltd. Diamond Trading Company Research Centre

China is an increasingly important diamond market and as such will inevitably be seen as a potential market for synthetics and treated *** important contribution of the research carried out by De Beers was the production of the Diamond Verification Instruments:DiamondSure,DiamondView and *** can be used to screen out diamonds that could potentially be synthetics and DiamondView allows imaging of the fluorescence patterns associated with growth and therefore provides unambiguous identification of *** of typical features of various synthetics are *** technical uses of single crystal diamond are currently expanding and the demands of these technologies for higher crystal qualities and larger sizes have helped drive the development of synthesis methods and these advances have enabled the production of material that could potentially be manufactured into polished *** there have been significant developments both in the synthesis methods themselves and in post-growth treatments,detection capability has kept pace with these developments and continues to provide reliable *** testing supporting full disclosure will ensure that consumers will be properly informed about their diamond purchases and will maintain the integrity of brands such as Forevermark into the future.

关键词： Diamond synthetics Identification

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Developments in the Detection of Current HPHT and CVD synthetics

Developments in the Detection of Current HPHT and CVD Synthe...

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2015中国珠宝首饰学术交流会

作者： David Fisher De Beers Technologies Belmont RoadMaidenheadSL6 6JWUK

Recent changes in the properties of both HPHT and CVD synthetics will require changes in the way identification criteria are *** Beers continually develops the Verification Instruments it produces to respond to these *** Automated Melee Screening instrument provides screening capability for melee sized synthetic stones and the introduction of filtering into the latest version of the DiamondView?instrument has enhanced its capability for the identification of both HPHT and CVD synthetics.

关键词： HTHP CVD synthetics diamond.

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