Chemical induction of sterility in wheat     

Jan  C. C.  Qualset  C. O.  Vogt  H. E. 《Euphytica》1974,23(1):78-85

Euphytica - Foliar application of two spring wheat varieties, Anza and Yecora 70, with RH-531 several days before meiosis in a field experiment almost completely prevented seed development. A...  相似文献   

Distribution of the cis-sabinene hydrate acetate-chemotype in accessions of marjoram (Origanum majorana L.)     

Johannes Novak  Christina Bitsch  Friedrich Pank  Jan Langbehn  Chlodwig M. Franz 《Euphytica》2002,127(1):69-74

The bicyclic monoterpenes cis-sabinene hydrate and cis-sabinene hydrate acetate are considered to be responsible for the special flavor of marjoram (Origanum majorana L.). Analysis of single plants of different marjoram accessions revealed the presence of a chemotype that divided the samples into two groups, with cis-sabinene hydrate acetate present either at high amounts of above 19% or at low amounts below 2%. Additionally, an arrow negative correlation of the concentration of cis-sabinene hydrate to its acetate was observed (R² = 0.92).Since no trans-sabinene hydrate acetate could be found in the analyzed samples, the formation of cis-sabinene hydrate acetate seems to be a result of a specific enzymatic conversion in marjoram. Among 20 accessions ofmarjoram studied, 17 were heterogeneous for the cis-sabinene hydrate acetate chemotype with frequencies of the low cis-sabinene hydrate acetate type between10% and 50%. If further sensorial studies can give leads as to which of the two compounds contributes to the preferred flavor, the variation observed in this study among natural populations could be used in breeding towards an optimized quality of marjoram. The analytical technique applied in this study can be used to screen high sample numbers with a reasonable effort and time. This revised version was published online in August 2006 with corrections to the Cover Date.  相似文献   

Inheritance of resistance to sunflower downy mildew races 1, 2 and 3 in cultivated sunflower   总被引：1，自引：0，他引：1  

M. Rahim    C. C. Jan  T. J. Gulya 《Plant Breeding》2002,121(1):57-60

Sunflower downy mildew (SDM) caused by Plasmopara halstedii, is a major disease of sunflower. Eleven resistance genes have been identified, but allelic relationships among these genes are not clear. This study examined the inheritance and allelic relationships of genes conferring resistance to SDM races 1, 2 and 3 (virulence phenotypes 100, 300 and 700, respectively) and confirmed a twelfth resistance gene. Three USDA Plant Introductions, AMES 3235, PI 497250, and PI 497938, and three released lines, RHA 266, RHA 274 and DM‐2 were studied. RHA 266 has only the Pl₁ gene for race 1 resistance. Digenic inheritance of resistance was found in AMES 3235, PI 497250, and RHA 274. These lines have the Pl₁ and Pl₁₂ genes, conferring resistance to race 1, and the Pl₂ and Pl₁₁ genes, conferring resistance to race 2. DM‐2 and PI 497938 have Pl₁₂ (but not Pl₁ for resistance to race 1, the Pl₁₂ gene (but not the Pl₂) for resistance to race 2, and Pl₅ for resistance to race 3. These resistance genes will serve as a foundation for future gene designations and genetic diversity studies of resistance to SDM.  相似文献   

Life history studies of the leafminer Liriomyza trifolii on susceptible and resistant cultivars of Dendranthema grandiflora   总被引：1，自引：0，他引：1  

Jan De Jong  Wim Rademaker 《Euphytica》1991,56(1):47-53

Summary The feeding, fecundity, mortality and rate of development of Liriomyza trifolii (Burgess) on 12 cultivars of Dendranthema grandiflora (Tzvel.) (Syn. Chrysanthemum morifolium (Ramat.)) were determined in no choice experiments. Number of feeding punctures, number of eggs laid and total number of larvae varied between cultivars but these characters were not strongly associated with leafminer population increase. Good indicators of host plant resistance were larval mortality, number of pupae and duration of the larval period. Of these three, larval mortality which could be as high as 98% was most suitable.Based on life history data it was predicted that Liriomyza trifolii cannot survive on the resistant cultivar Penny Lane. This prediction was verified experimentally.  相似文献   

Genetic variability for root and shoot traits in a lentil (Lens culinaris Medik.) recombinant inbred line population and their association with drought tolerance     

Omar Idrissi  Chafika Houasli  Sripada M. Udupa  Ellen De Keyser  Patrick Van Damme  Jan De Riek 《Euphytica》2015,204(3):693-709

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Association of SSR markers and morpho-physiological traits associated with salinity tolerance in sugar beet (Beta vulgaris L.)     

Zahra Abbasi  Mohammad Mahdi Majidi  Ahmad Arzani  Abazar Rajabi  Parisa Mashayekhi  Jan Bocianowski 《Euphytica》2015,205(3):785-797

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Genetic diversity analysis of Moroccan lentil (Lens culinaris Medik.) landraces using Simple Sequence Repeat and Amplified Fragment Length Polymorphisms reveals functional adaptation towards agro‐environmental origins          下载免费PDF全文

Omar Idrissi  Sripada M. Udupa  Chafika Houasli  Ellen De Keyser  Patrick Van Damme  Jan De Riek 《Plant Breeding》2015,134(3):322-332

In the absence of previous molecular characterization, we assessed genetic diversity of 53 Moroccan lentil landraces including two local cultivars using simple sequence repeat (SSR) and amplified fragment length polymorphisms (AFLP). Nineteen SSRs yielded 213 alleles, and seven AFLP primer combinations gave 766 fragments of which 422 were polymorphic. Moderate to high genetic variation was observed. Several small groups of landraces were differentiated. Interestingly, one of the smallest groups contained short‐cycle landraces with high early vegetative growth. Landraces in that group were from the dry land location of Abda, where they were likely selected for adaptation to drought and heat stress over centuries. Another group contained two landraces from highland areas that may have been selected for specific adaptation to cold stress. A third group contained one landrace from the Zear region known for its seed quality and has been proposed for the protected designation of origin (PDO) quality mark. Both techniques gave evidence of differentiation of the latter landrace supporting the idea of PDO attribution. Functional grouping according to agro‐environmental origins, cycle duration and early vegetative vigour was observed.  相似文献   

Plant tissue culture of Secale: A review     

Jan J. Rybczyński 《Euphytica》1990,46(1):57-70

Summary Plant tissue culture of rye employs different parts of plant bodies originating from various stages of rye ontogenesis. For the culture initiation mainly diploid and after that tetraploid forms were used, however, haploids and triploids were subject of investigation. The development of plant regeneration via somatic embryogenesis or organogenesis required the using of numerous basal media with various plant growth hormones. Haploidization appeared to be the most difficult problem and only interspecies hybridization helped to overcome this problem. Wide sexual intergenera and interspecies hybridization in cereals require the development of proembryo and immature embryo culture system. Using the nurse culture basing on immature endosperm resulted in getting fully formed rye plants. There is no progress in somatic cell genetic manipulation of rye because of lack of plant regeneration system in mesophyll green leaf and suspension protoplast cultures.Abbreviations 2, 4, 5, Cl₃POP... 2, 4, 5-Cl₃-phenoxypropionic acid, dicamba...-3, 6-dichloroasinic acid - GA₃... gibberellic acid - BA... benzyladenine - IBA... 3-indolebutric acid - IAA... indoleacetic acid - NAA... 1-naphtylacetic acid - 2, 4-D... 2, 4-dichlorophenoxyacetic acid - 2, 4, 5-T... 2, 4, 5-trichloroacetic acid - p-CPA... parachlorophenoxyacetic acid - CM... coconut milk - CW... deproteined coconut milk - Kin Kinetin  相似文献   

Selection of Al-resistant plants from a sensitive rice cultivar, using somaclonal variation, in vitro and hydroponic cultures     

Véronique Van Sint Jan  Cristiane Costa de Macedo  Jean-Marie Kinet  Jules Bouharmont 《Euphytica》1997,97(3):303-310

A selection procedure is described that isolated Al-resistant individuals from a sensitive rice (Oryza sativa L.) genotype. Somaclonal variation was used as the only source of variability and selection pressures were applied at both callus and regenerated plant levels. When 10 week-old, embryo-derived calli were submitted to different Al stresses for a period of 20 weeks. After this in vitro stress period, selected calli were grown during 18 weeks, without selection pressure, on regeneration media. Selection pressures were applied on regenerated plants (R0), and 9 R0 plants which produced seeds were selected. The transmission of the Al-resistant character to the R1, R2, R3 and R4 generations was then investigated, and three plant lines which had an increased percentage of Al-resistant plants till the fourth generation of self-pollination, were identified. One was from a callus maintained on an Al-free medium. The efficiency of in vitro selection pressures was therefore debated. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   

Resistance to tomato spotted wilt virus in transgenic tomato hybrids     

Tineke Ultzen  Jan Gielen  Fenna Venema  Annemarie Westerbroek  Peter de Haan  Mei-Lie Tan  André Schram  Mart van Grinsven  Rob Goldbach 《Euphytica》1955,85(1-3):159-168

Summary Tomato spotted wilt virus (TSWV) causes significant economic losses in the commercial culture of tomato (Lycopersicon esculentum Mill.). Culture practices and introgression of natural sources of resistance to TSWV have only been marginally effective in controlling the TSWV disease. Recently however, high levels of protection against TSWV have been obtained by transforming tobacco with a chimaeric gene cassette comprising the TSWV nucleoprotein gene. This report demonstrates the successful application of this newly-created TSWV resistance gene in cultivated tomato. Transformation of an inbred tomato line with the TSWV nucleoprotein gene cassette resulted in high levels of resistance to TSWV that were maintained in hybrids derived from the parental tomato line. Therefore, transformant lines carrying the synthetic TSWV resistance gene make suitable progenitors for TSWV resistance to be incorporated into the breeding programmes of tomato.  相似文献