Reproductive partitioning and seed set efficiency in soybean, sunflower and maize

Vega, Claudia Rosa Cecilia; Andrade, Fernando H.; Sadras, Víctor O.

doi:10.1016/s0378-4290(01)00172-1

Cited by 145 publications

(130 citation statements)

References 43 publications

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“…Partitioning of assimilates to the ear suggested that there could be an increased kernel set in the hybrid than OPV maize cultivars. This was reflected in reduced ASI (Otegui and Bonhomme, 1998;Vega et al, 2001). A non-significant reduction in ASI was equally observed in our trials, which is consistent with earlier made observation.…”

Section: Discussionsupporting

confidence: 92%

Performance of maize (<i>Zea mays</i>) cultivars as influenced by grade and application rate of Organo-mineral fertiliser in a transitory rain forest

Aderibigbe¹,

Sakariyawo²,

Kasali³

2017

Agrosearch

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Section: Discussionsupporting

confidence: 92%

Performance of maize (<i>Zea mays</i>) cultivars as influenced by grade and application rate of Organo-mineral fertiliser in a transitory rain forest

Aderibigbe¹,

Sakariyawo²,

Kasali³

2017

Agrosearch

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“…Segundo os mesmos autores, a variável número de grãos por espiga foi onde se observaram diferenças mais evidentes, resultados condizentes aos encontrados para número de grãos por fileira no presente trabalho. Tais resultados, corroboram com os obtidos para número de grãos e produtividade de grãos por planta em trabalhos com a cultura de milho realizados por Andrade et al (1999), Vega et al (2001b), Kiniry et al (2002) e Maddonni e Otegui (2004; e evidenciaram os efeitos diferenciados da competição intra-específica no crescimento de plantas e alocação de biomassa nas estruturas produtivas (Vega et al 2001a;Echarte e Andrade, 2003).…”

Section: Revistaunclassified

Vigor de sementes e desempenho de plantas de milho

Mondo¹,

Cícero²,

Neto³

et al. 2012

Rev. bras. sementes

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RESUMO -Estudou-se os efeitos da utilização de lotes constituídos por sementes de milho de alto ou de baixo vigor, bem como a mistura desses em diferentes proporções, simulando-se o uso de lotes de sementes homogêneos e heterogêneos quanto ao vigor das sementes, sobre o crescimento inicial e produtividade das plantas. Observou-se que plantas originadas de sementes menos vigorosas foram inferiores às originadas de sementes mais vigorosas quanto ao crescimento inicial e, para os componentes de produção, as provenientes de sementes menos vigorosas não foram inferiores nas distribuições onde houve 100% de um tipo de semente, porém, foram inferiores quanto acúmulo de massa de matéria seca, número de grãos por fileira e produtividade de grãos nas demais distribuições. Assim, vigor de sementes está diretamente relacionado ao crescimento inicial das plantas; porém, seus efeitos não persistem até o final do ciclo da cultura quando há o uso de lotes homogêneos quanto ao vigor das sementes. O uso de lotes heterogêneos resulta em maior competição intraespecífica proporcionando menor capacidade competitiva às plantas provenientes de sementes de menos vigorosas, sendo estas dominadas pelas provenientes de sementes de alto vigor, refletindo negativamente em produção por planta.Termos para indexação: competição intra-específica, potencial fisiológico, plantas dominadas, Zea mays L.Maize seed vigor and plant performance ABSTRACT -The objective of this study was to evaluate the effects of using maize seed lots constitued of high and low vigor seeds, as well as mixtures of different proportions, on plant growth and yield. Plants from high vigor seeds showed higher initial growth than those from low vigor seeds, independently of seed distribution and position in the seeding row. Comparing the yield components between plants arising from high and low vigor seeds, when the percentages of one type of seed were 100% (homogeneous lots), results were similar, but plants from low vigor seeds had inferior results on other seed distributions (heterogeneous lots). Seed vigor is directly related to initial plant growth in maize but the effects do not continue until harvest when using seed lots with homogeneous vigor. However, the use of seed lots with heterogeneous vigor results in more intra-specific competition and a lower competitive capacity for plants originating from low vigor seeds, resulting in dominated plants which grow and yield less.

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“…Next to rice and wheat maize is the staple food crop for human consumption, animal feed and bioethanol production as well as model plant for cereal research (Vega et al, 2001) throughout the world. Mainly this crop is affected by biotic as well as abiotic stresses which control the crop productivity.…”

Section: Introductionmentioning

confidence: 99%

Resourceful and High Efficiency Agrobacterium Mediated Transformation of Maize (Zea mays L.) Using Coleoptilar Nodal Explants

Sreenu¹,

Kumar²,

Reddy³

et al. 2016

Int. J. Curr. Res. Biosci. Plant Biol.

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A b s t r a c t A r t i c l e I n f oColeoptilar nodal explants, which are independent of season, were used to develop high efficiency transformation method in maize. Conditions which affect Agrobacterium-mediated genetic transformation have been standardized by using these explants on hygromycin selection regime. Hyper virulent Agrobacterium strain EHA105 containing gateway vector pMDC99 with Ascorbate -Glutathione pathway coding genes harboring with hygromycin phosphotransferase (hpt II) and bar as plant selectable marker genes was used. The survival frequency of calli at three different stages viz., at the end of I sub-culture on normal medium and II selection as well as on regeneration media supplemented with hygromycin were taken into consideration for the assessment of optimal conditions after checking with PCR. Of the different parameters used with different conditions, one day pre-conditioning of explants, 0.8 optical density of bacterial culture in plain MS liquid infection medium having 5.8 pH along with 200 µM acetosyrengone, 15 minutes infection time for the explants after treating with 0.1% Macerozyme, application of vacuum infiltration for 10 minutes, three days of co-cultivation period were found to be optimal for getting high frequency of transformation through Agrobacterium-mediated genetic transformation in maize. Transformation frequency of 3.25% was obtained on average with these optimal conditions, for which the explants were co-cultivated with these conditions and inoculated on callus induction medium having hygromycin at 10 mg l -1 for selection. The selected calli were transferred onto regeneration medium supplemented with BAP and Kinetin, at a concentration of 1 mg l -1 each for plantlet development. Putative transformants were screened by using hpt II gene specific primers and confirmed after performing southern analysis.

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Reproductive partitioning and seed set efficiency in soybean, sunflower and maize

Cited by 145 publications

References 43 publications

Performance of maize (<i>Zea mays</i>) cultivars as influenced by grade and application rate of Organo-mineral fertiliser in a transitory rain forest

Performance of maize (<i>Zea mays</i>) cultivars as influenced by grade and application rate of Organo-mineral fertiliser in a transitory rain forest

Vigor de sementes e desempenho de plantas de milho

Resourceful and High Efficiency Agrobacterium Mediated Transformation of Maize (Zea mays L.) Using Coleoptilar Nodal Explants

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