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Asante Maxwell Darko Adjah Kossi Lorimpo Annan-Afful Ebenezer 《Journal of Crop Science and Biotechnology》2019,22(2):123-130
Journal of Crop Science and Biotechnology - Even though there are abundant rice genetic resources, only a fraction is used in breeding programs leading to a narrow genetic base for improved... 相似文献
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Production and testing of plants regenerated from protoplasts of photoperiod sensitive genic male sterile rice (Oryza sativa L.) 总被引：1，自引：0，他引：1
Qingzhong Xue Kossi Edoh Hong Li Nengyi Zhang Juqiang Yan Susan McCouch Elizabeth D. Earle 《Euphytica》1999,105(3):167-172
Plants were regenerated from protoplasts isolated from embryonic suspension cultures of N5047S, a photoperiod sensitive genic
male sterile (PGMS) Japonica rice line. Flow cytometric analyses of nuclear DNA content identified some tetraploid regenerates
whose agronomic traits could be distinguished from diploid regenerates. Pollen and female fertility of diploid protoplast-derived
clones grown under different light and temperature conditions was compared. A promising PGMS protoplast clone, ZAU11S, was
developed from these clones. Its male sterility was confirmed as a photoperiod × temperature interaction type.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
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Twenty-two improved and local cassava genotypes were evaluated for their bacterial blight symptom types in reaction to infection
by Xanthomonas axonopodis pv. manihotis under field conditions in the forest, forest savanna transition and wet savanna zones of Togo. High genotype × environment
interactions in development of each symptom type were observed. Combining data on environments and genotypes, spot, blight
and wilt symptoms were positively correlated. Analysing genotype reactions across environments, indications for independent
mechanisms of resistance on leaf and stem level, varying by genotype, were found. Genotypes Main27 with resistance to spot
and blight symptoms and TMS4(2)1425 with resistance to wilt symptoms are recommended to breeders to introgress their resistance
characteristics. Significant negative correlations were generally observed between blight and wilt symptom development and
root yield across ecozones, with blight being more important under lower, and wilt under higher inoculum pressure. Genotypes
TMS30572, CVTM4, TMS92/0429 and TMS91/02316 showed low spot, blight and wilt symptoms combined with high root yield across
ecozones. 相似文献
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Gabriel H. SEGNIAGBETO Koen VAN WAEREBEEK Joseph E. BOWESSIDJAOU Koffivi KETOH Takouda K. KPATCHA Kotchikpa OKOUMASSOU Kossi AHOEDO 《Integrative zoology》2014,9(1):1-13
Based on strandings and captures, 9 cetacean species, including 6 odontocetes and 3 mysticetes, are documented (photos and specimens) in Togo's coastal waters (newly‐recorded species marked with an asterisk): Antarctic minke whale (Balaenoptera bonaerensis*), Bryde's whale (Balaenoptera brydei or B. edeni), humpback whale (Megaptera novaeangliae), sperm whale (Physeter macrocephalus), pygmy sperm whale (Kogia breviceps*), short‐finned pilot whale (Globicephala macrorhynchus*), pantropical spotted dolphin (Stenella attenuata*), common bottlenose dolphin (Tursiops truncatus) and common dolphin Delphinus sp. An anecdotal sighting record for killer whale (Orcinus orca) is considered reliable. The lack of Sousa teuszii records in Togo is consistent with its apparent contemporaneous absence in Ghana. The B. bonaerensis specimen, entangled in a purse seine set on small pelagics, is a first record for the Gulf of Guinea. The occurrence of this Southern Ocean species north of the equator underscores the severe gaps in our understanding of cetacean distribution off western Africa. The majority of artisanal fishermen operating in Togolese coastal waters are of Ghanaian origin and are thought to promote trade and consumption of cetacean bushmeat. Because captures are illegal, enforced with some success in the main fishing centers, covert landings of cetaceans are exceedingly difficult to monitor, quantify or sample. Concern is expressed about pollution of Togo's coastal waters with heavy metals due to phosphorite mining and export from the coastal basin near Hahotoé and Kpogamé. 相似文献
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水稻株高基因对GA3敏感性及与酶的关系 总被引：14，自引：2，他引：14
用3对水稻植株高度近等基因对，研究了株高基因对GA3 敏感性和酶的影响。结果表明，株高基因在苗期对GA3 敏感性强弱顺序为eui>sd1>Sd1>sds(t)；其中梗稻的Sd1敏感性强于籼稻的。 用胚乳培养法快速鉴别水稻株高基因对GA3敏感性的结果与幼苗鉴定的一致，说明这种方法是有效的。 在酶活性方面，4 d的幼苗中高秆品系的过氧化物酶活力比矮秆品系的高， 而8 d的幼苗中矮秆的活力反而比高秆的强。经GA3处理4 d和8 d后，对GA3敏感的品系过氧化物酶活力较低， 过氧化物酶同工酶带8和酯酶同工酶带7与株高对GA3的敏感性有关。 相似文献
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Kodjo Eloh Kafui Kpegba Nicola Sasanelli Honoré Kossi Koumaglo Pierluigi Caboni 《国际虫害防治杂志》2020,66(2):131-141
AbstractPlant parasitic nematodes are among the most destructive plant pathogens worldwide and their control is very challenging. Plant essential oils (EOs) have showed a great potential in nematode control. In this work, EOs from 10 aromatic plants acclimatized in Togo were assessed in vitro for their nematicidal activity on the root-knot nematode Meloidogyne incognita. EOs were subsequently analyzed by GC-MS and compounds were tested individually on nematodes. The most potent EOs were: Ocimum sanctum L., Cymbopogon schoenanthus (L.) Spreng and Cinnamomum zeylanicum Blume with EC50/72h values of 282?±?53, 288?±?30 and 355?±?126?mg/L, respectively. The EC50/48h values of tested compounds were 81?±?14, 117?±?33, 128?±?42, 141?±?47, 168?±?40, 216?±?86 and 235?±?43?mg/L for cinnamyl acetate, methyl eugenol, cinnamyl alcohol, acetyl eugenol, isoeugenol, eugenol and benzyl benzoate, respectively. Furthermore, we found a synergistic nematicidal activity when we combined phenylpropanoids compounds with carvone. EOs and their constituents described herein merit further studies, especially in pot experiments before serving as nematicides. 相似文献
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Kossi Koudjega Komlan Adigninou Ablede Mark Kofi Abekoe Emmanuel Owusu-Bennoah Daniel Kekeli Tsatsu 《Communications in Soil Science and Plant Analysis》2019,50(8):974-986
An experiment was conducted to determine the depth of urea supergranule (USG) application that reduces ammonia (NH3) volatilization and improves nitrogen use efficiency of rice. Canne, Voudou, Akuse, and Bumbi series were used. Treatments involved surface application of prilled urea (PU), USG applied at 0, 4, 8, 12 and 16 cm depths and a control. Rice variety IR-841 was grown up to maturity. Closed chamber device was used to trap NH3. Results indicated that the highest mean NH3 loss occurred in Bumbi series (13.67%) while the lowest was Canne series (8.16%). USG applied at 0 cm resulted in the highest NH3 loss (37.2%). NH3 volatilization decreased with increasing depth of USG application. The highest grain yields were obtained when USG was applied at 4 and 8 cm. In Canne series, the highest agronomic use efficiency (AE) of N (57 g g?1) was obtained with USG applied either at 8 or 12 cm while the highest recovery efficiency (RE) (84%) occurred at 8 cm. In Akuse series, the highest AE (55 g g?1) and RE (78%) were obtained when USG was placed at 8 cm. In Voudou and Bumbi series, the highest AE (45 and 48 g g?1 respectively) and RE (64%) were obtained with USG deep placed at 4 cm. The results therefore suggested different specific depths of USG application to reduce ammonia loss and improve nitrogen use efficiency. 相似文献
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Kossi Lorimpo Adjah Maxwell Darko Asante Aboubacar Toure Mawuli Aziadekey Francis Osei Amoako-Andoh Michael Frei Yacouba Diallo Komi Agboka 《水稻科学》2022,29(6):512-521
Rice plays a paramount role in food and nutrition security in many West African countries. Despite the doubling of production during the last decade, rice consumption has grown faster, creating a deficit between the demand and supply. Although the West African sub-region remains the main rice-producing centre on the continent, production is severely hampered by biotic and abiotic stresses. Drought is one of the factors that most severely reduce grain yields of rice. Systems of production need to be established in order to mitigate yield loss as a result of drought. This review discusses the effects of drought on rice production in West Africa and its mitigation with an emphasis on the improvement of tolerance to drought stress. Yield stability can be achieved by developing drought-tolerant varieties through several processes encompassing profiling of known QTLs and identification of new ones, marker-assisted selection, genomic selection, and extensive multi-locational yield trials. We suggest a comprehensive strategy for breeding drought-tolerant rice varieties in West Africa. 相似文献
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