1,721,026 research outputs found
Partenocarpia
No full textLa tecnica agronomica più diffusa per ottenere una soddisfacente allegagione del pomodoro in condizioni climatiche sfavorevoli consiste nell’ indurre lo sviluppo di frutti partenocarpici trattando i fiori con sostanze fitoregoloatrici auxino-simili e/o con altri regolatori di crescita come ad esempio le gibberelline. La partenocarpia è definita in questo caso artificiale perché ottenuta tramite l’uso di sostanze chimiche applicate al fiore. La partenocarpia può essere ottenuta anche per via genetica. Allo stato attuale l’uso dell’ingegneria genetica per produrre cultivar partenocarpiche ha dimostrato maggiori potenzialità rispetto alle tecniche classiche di breeding. Infatti è stato dimostrato che manipolando, tramite tecniche genetiche, l’azione di due ormoni vegetali, auxina e gibberelline, a vari livelli , cioè agendo sulla sintesi, oppure sulla sensibilità delle piante agli ormoni o ancora sulle vie di traduzione del segnale ormonale, è possibile ottenere lo sviluppo partenocarpico del frutto
Inheritance of Fusarium wilt resistance introgfressed from Solanum aethiopicum Gilo and Aculeatum groups into cultivated eggplant (S. melongena) and development of assiciated PCR-based markers
No full textThe two eggplant relatives Solanum
aethiopicum gr. Gilo and Solanum aethiopicum gr.
Aculeatum (=Solanum integrifolium) carry resistance
to the fungal wilt disease caused by Fusarium
oxysporum f. sp. melongenae, a worldwide soil-borne
disease of eggplant. To introgress the resistance
trait into cultivated eggplant, the tetraploid
somatic hybrids S. melongena + S. aethiopicum and
S. melongena + S. integrifolium were used. An
inheritance study of the resistance was performed
on advanced anther culture-derived androgenetic
backcross progenies from the two somatic hybrids.
The segregation fitted a 3 resistant (R): 1 susceptible
(S) ratio in the selfed populations and a 1R:1S ratio in
the backcross progenies for the trait derived from
S. aethiopicum and S. integrifolium. These ratios are
consistent with a single gene, which we designated as
Rfo-sa1, controlling the resistance to Fusarium
oxysporum f. sp. melongenae. The allelic relationship
between the resistance genes from S. aethiopicum and
S. integrifolium indicate that these two genes are
alleles of the same locus. Bulked Segregant Analysis
(BSA) was performed with RAPD markers on the
BC3/BC5 resistant advanced backcross progenies, and
three RAPD markers associated with the resistance
trait were identified. Cleaved Amplified Polymorphic
Sequences (CAPSs) were subsequently obtained on
the basis of the amplicon sequences. The evaluation
of the efficiency of these markers in predicting the
resistant phenotype in segregating progenies revealed
that they represent useful tools for indirect selection
of Fusarium resistance in eggplant
Uso della spettroscopia di risonanza magnetica nucleare 1H-HRMAS e della gas cromatografia per la differenziazione di Solanacee affini a melanzana (S.melongena L.)
No full textInvestigation into in vitro methods for measuring eggplant resistance to Verticillium dahliae
No full text
Investigation of in-vitro methods for measuring eggplant resistance to Verticillium dahliae.
No full textInvestigation of in-vitro methods for measuring eggplant resistance to Verticillium dahliae.
No full textInvestigation into in vitro methods for measuring eggplant resistance to Verticillium dahliae
No full textSources of resistance among Solanum spp. to an italian isolate of Fusarium oxysporum f.sp. melongenae
No full text
- …
