AGRONOMIJAS VÄSTIS - Latvijas LauksaimniecÄ«bas universitÄte

More documents

Recommendations

Info

<strong>AGRONOMIJAS</strong> VĒSTIS (Latvian Journal of Agronomy), No.10, LLU, 200835Calli forming regenerants (%) '30252015105ControlAmbiolAV-153Ascorbic acidTriovitFlax seed ex.0LeavesExplantsFigure 5. Calli regeneration capacity on shot formation medium with different antioxidantsdepending on explant typeThe use of the most appropriate source material is always crucial to achieve breeding goals.The old plant genetic resources usually are characterised by good adaptation to the local conditionsbut loose to the modern varieties in yield capacity, quality, resistance to new pathogen races etc andtherefore could not be used directly in contemporary agriculture. A solution can be found incrossing the best local and modern varieties to combine the favourite characteristics of bothmaterials. Our results of the evaluation of the Latvian flax genetic resources shown, that some ofthem had very good performance in yield and adaptability. Four genotypes were suggested as goodfor fibre flax breeding and two genotypes for oil flax breeding in Latvian conditions. Some hybridsobtained from crosses among local genotypes and best foreign varieties were better in severalagriculturally important traits in comparison with the standard variety.Calli culture could be very useful for the broadening of source material for breeding.Formation of flax calli culture is possible from various parts of seedlings (roots, hypocotyls,cotyledons, stems, leaves). Depending on the genotype and explant type the rate of calli formationranged from 50 to 90% (Poliakov, 2000; Rutkowska-Krause et al., 2003; Yildiz and Özgen, 2004).Our results supported earlier findings that stem fragments and leaves were useful for obtaining flaxcalli cultures. For the first time it has been demonstrated that the addition of antioxidants or flaxseed extracts could significantly increase the shot formation capacity and can by this broaden thespectrum of inicial genotypes for inducing somaclonal variation.ConclusionFour genotypes were suggested as good for fibre flax breeding and two genotypes for oilflax breeding in Latvian conditions. Some hybrids obtained from crosses among local genotypesand the best foreign varieties were better in several agriculturally important traits in comparisonwith the standard variety.Used explants were excellent for calli culture formations (100% of the used explantsdeveloped calli). The development of regeneration zones were depended on both from the usedexplant type and antioxidant flax seed extract but did not depended on the calli weight. By using athe appropriate additions (an antioxidant or flax seed extract) to the shoot formation medium thecalli regeneration capacity can be significantly increased.References1. Brar, D.S.; S.M. Jain (1998) Somaclonal variation: mechanism and applications in crop improvement. In:Somaclonal Variation and Induced Mutations in Crop Improvement. Mohan Jain S., Brar D.S.,Ahloowalia (eds). Kluwer Academic Publishers, UK, 15-39.2. Grauda, D., Rashal, I. (2005) Calli culture of oil flax: establishing and regeneration. Latvian Journal ofAgronomy, 8, 104-106.Stem116
<strong>AGRONOMIJAS</strong> VĒSTIS (Latvian Journal of Agronomy), No.10, LLU, 20083. D. Grauda, V. Stramkale, I. Rašals. (2004) Evaluation of Latvian flax varieties and hybrids. Proceedingsin Agronomy, 6, 159-165.4. Larkin, P.J.; Scowcroft, W.R. (1981) Somaclonal variation – a novel source of variability from cellculture for plant improvement. Theoretical and Applied Genetics, 60, 197-214.5. Leike, H. (1985) Methoden der Gewebekultur zur Beschleunigung des Zuchtfortschrittes.Tagungoberichts Akademie Landwirtschaft – Wissenschaft., 237, 19-33.6. Nitchterlein, K. (2003) Anther culture of linseed (Linum usitatissimum L.). In: Doubled HaploidProduction in Crop Plants. Maluszynski M., Kasha K.J., Foster B.P., Szarejko I. (eds). Kluwer AcademicPublishers, Dordrecht, Netherlands, 249-254.7. Poliakov, А.V. (2000) Biotechnology in flax Breeding. Format, Tver, Russia (in Russian), 178.8. Rashal, I., Stramkale, V. (1998) Conservation and use of the Latvian flax genetic resources. In:Proceedings of the Symposium “Bast Fibrous Plants Today and Tomorrow: Breeding, Molecular Biologyand Biotechnology Beyond 21 st Century”, St. Petersburg, Russia. Natural Fibres, iss. 2, 56-58.9. Rutkowska-Krauze, I, Mankowska, G, Lukaszewicz, M, Szopa J. (2003) Regeneration of flax (Linumusitatissimum L.) plants from anther culture and somatic tissue with increased resistance to Fusariumoxysporum. Plant Cell Reports, 22, 110-116.10. Yildiz, M, Özgen, M. (2004) The effect of a submersion pretreatment on in vitro explant grow and shootregeneration from hypocotyls of flax (Linum usitatissimum L.). Plant Cell, Tissue and Organ Culture, 77,111-115.ANALYSIS OF SWARD MANAGEMENT FACTORS INFLUENCING Festulolium ANDLolium x boucheanum YIELD FORMATIONGutmane I., Adamovich A.Latvia University of Agriculture, 2 Liela iela, Jelgava, LV-3001, LatviaAbstractUnder conditions of the Latvian climate, forage grasses are the main fodder source in cattlebreeding. Festulolium hybrids are among the most persistent and productive grasses of the grassesused in many Europe countries, especially in adverse environments. The aim of this research was toinvestigate dry matter yield formation and the sward persistency of Festulolium and Lolium xboucheanum varieties under the agro-ecological conditions of Latvia. Field trials were establishedon the sod–podzolic soil and fertilized with N 120 (60+60) , N180 (60+60+60) , P 78 and K 90 kg ha -1 .Forages were harvested three times during the growing season. During the three years of utilizationthe dry matter yield for festulolium and ryegrass swards was reliably (P
Page 1 and 2:
LATVIJAS LAUKSAIMNIECĪBAS UNIVERSI
Page 4 and 5:
AGRONOMIJAS VĒSTIS (Latvian Journa
Page 6 and 7:
Page 8 and 9:
Page 10:
Page 13 and 14:
Page 15 and 16:
Page 17 and 18:
Page 19 and 20:
Page 21 and 22:
Page 23 and 24:
Page 25 and 26:
Page 27 and 28:
Page 29 and 30:
Page 31 and 32:
Page 33 and 34:
Page 35 and 36:
Page 37 and 38:
Page 39 and 40:
Page 41 and 42:
Page 43 and 44:
Page 45:
Page 48 and 49:
Page 50 and 51:
Page 52 and 53:
Page 54 and 55:
Page 56 and 57:
Page 58 and 59:
Page 60 and 61:
Page 62 and 63:
Page 64 and 65:
Page 66 and 67: AGRONOMIJAS VĒSTIS (Latvian Journa
Page 166 and 167:
Page 168 and 169:
Page 170 and 171:
Page 172 and 173:
Page 174 and 175:
Page 176 and 177:
Page 178 and 179:
Page 180 and 181:
Page 182 and 183:
Page 184 and 185:
Page 186 and 187:
Page 188 and 189:
Page 190 and 191:
Page 192 and 193:
Page 194 and 195:
Page 196 and 197:
Page 198 and 199:
Page 200 and 201:
Page 202 and 203:
Page 204 and 205:
Page 206 and 207:
Page 208 and 209:
Page 210 and 211:
Page 212 and 213:
Page 214 and 215:
Page 216 and 217:
Page 218 and 219:
Page 220 and 221:
Page 222 and 223:
Page 224 and 225:
Page 226 and 227:
Page 228 and 229:
Page 230 and 231:
Page 232 and 233:
Page 234 and 235:
Page 236 and 237:
Page 238 and 239:
Page 240 and 241:
Page 242 and 243:
Page 244 and 245:
Page 246 and 247:
Page 248 and 249:
Page 250 and 251:
Page 252 and 253:
Page 254 and 255:
Page 256 and 257:
Page 258 and 259:
Page 260 and 261:
Page 262 and 263:
Page 264 and 265:
Page 266 and 267:
Page 268 and 269:
Page 270 and 271:
Page 272 and 273:
Page 274 and 275:
Page 276 and 277:
Page 278 and 279:
Page 280 and 281:
Page 282 and 283:
Page 284 and 285:
Page 286 and 287:
Page 288 and 289:
Page 290 and 291:
Page 292 and 293:
Page 294 and 295:
Page 296 and 297:
Page 298 and 299:
Page 300 and 301:
Page 302 and 303:
Page 304 and 305:
Page 306 and 307:
Page 308 and 309:
show all

AGRONOMIJAS VÄSTIS - Latvijas LauksaimniecÄ«bas universitÄte

Create successful ePaper yourself

Delete template?

Save as template?

AGRONOMIJAS VÄSTIS - Latvijas LauksaimniecÄ«bas universitÄte