https://repository.utm.md/handle/5014/28955 2026-04-21T19:05:02Z https://repository.utm.md/handle/5014/35884 Tetraploid maize - a new model for research in the field of ecological genetics BATÎRU, Grigore; COMAROVA, Galina The increase in the frequency of dry vegetation seasons in Moldova in recent decades determines the need to expand the range of research work on agroecology, in particular, in the field of ecological genetics. Specificity of understanding ecological genetics involves studying the genetic basis of variability and inheritance of adaptive plant reactions occurring at different levels of biological organization. In the present work it was suggested to use genomic (by tetraploid chromosome set) and gene (by the opaque-2 gene) mutations of maize as a contrast material for studying the adaptive response to various types of modeled drought. The results of the response of genomic mutants of maize in the process of ontogenetic development to various types of simulated drought are discussed: soil, air, and complex. The comparative study of the complex of physiological and biochemical parameters, such as the germination capacity, the content of photosynthetic pigments, the water-retaining capacity of the leaf apparatus, the leaf thickness stability coefficient, etc., allow us to identify specific features manifested by changing the genomic set of different maize genotypes, that in perspective expands the variation of germplasm for the selection of maize for drought resistance. 2018-01-01T00:00:00Z https://repository.utm.md/handle/5014/35883 Algorithm for creating electrophoretic passports of maize hybrids ADAMCIUC, Arcadii; BATÎRU, Grigore; COMAROVA, Galina; BOUNEGRU, Serghei; ROTARI, Eugen One of the topical issues of seed production in the Republic of Moldova is the timely export of hybrid maize seeds and ensuring their quality. In this regard, it is necessary to involve the latest methods of express diagnostics of hybrid purity of the- se seeds and their passportization in order to be able to carry out their objective and adequate certiȀcation. 2022-01-01T00:00:00Z https://repository.utm.md/handle/5014/35882 QTL mapping for haploid inducibility using genotyping by sequencing in maize TRAMPE, Benjamin; BATÎRU, Grigore; PEREIRA da SILVA, Arthur; FREI, Ursula Karoline; LÜBBERSTEDT, Thomas Doubled haploid (DH) technology in maize takes advantage of in vivo haploid induction (HI) triggered by pollination of donors of interest with inducer genotypes. However, the ability of different donors to be induced—inducibility (IND), varies among germplasm and the underlying molecular mechanisms are still unclear. In this study, the phenotypic variation for IND in a mapping population of temperate inbred lines was evaluated to identify regions in the maize genome associated with IND. A total of 247 F2:3 families derived from a biparental cross of two elite inbred lines, A427 and CR1Ht, were grown in three different locations and Inclusive Composite Interval Mapping (ICIM) was used to identify quantitative trait loci (QTL) for IND. In total, four QTL were detected, explaining 37.4% of the phenotypic variance. No stable QTL was found across locations. The joint analysis revealed QTL × location interactions, suggesting minor QTL control IND, which are affected by the environment. 2022-01-01T00:00:00Z https://repository.utm.md/handle/5014/35538 Influenţa agrocenozei şi lucrării convenţionale - arătură şi conservative - No till asupra emanării de CO2 din sol ANDRIUCĂ, Valentina; RUSU, Teodor; PACURAR, Ioan; BOGDAN, Ileana; POP, Adrian Ioan; MORARU, Paula Ioana; BACEAN, Ion; CAZMALÎ, Nicolai; COJOCARU, Olesea; MELNIC, Rodica Monitorizarea impactului agriculturii asupra componentelor schimbărilor climatice globale, managementul solului, apei şi carbonului prin sisteme conservative No-till este una strict necesară pentru Republica Moldova. Cercetările sunt direcţionate spre fondarea agro- ecosistemelor durabile - ecologic echilibrate. Cercetările au arătat, că emanarea de C02 din sol este în funcţie de fertilitate, acoperirea solului cu muici, agrocenoză, faza de dezvoltare a plantelor, umiditatea şi temperatura solului, aplicarea pesticidelor în agroecosistem. S-a stabilit, că agrocenoza cu soia posedă cele mai mici valori ale respiraţiei solului. Capacitatea de fixare a azotului, gradul de dezvoltare a nodozităţilor la soia influenţează direct emanările de C02 din sol. Sub culturile prăşitoare, în fazele active de vegetaţie au fost înregistrate cele mai mari valori ale emanării de C02 din sol. S-a evidenţiat, că spre sfârşitul perioadei de vegetaţie respiraţia solului se micşorează. Resturile organice de la suprafaţa solului, aplicate în sistemul agricol No-till, dublează valorile emanării de C02 din sol dacă solul este lipsit de vegetaţie vie activă. Pentru sechestrarea carbonului după recoltarea cerealelor din prima grupă se recomandă cultivarea culturilor leguminoase intermediare. 2017-01-01T00:00:00Z