Effect of set-size and storage temperature on bolting, bulbing and seed yield in two onion cultivars

Khokhar, K. M.

doi:10.1016/j.scienta.2009.05.008

Cited by 26 publications

(27 citation statements)

References 17 publications

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“…Em seu estudo, o autor constatou diminuição da firmeza em cebolas durante armazenamento refrigerado. A diminuição da firmeza em frutas e hortaliças está associada a reações bioquímicas de degradação das paredes celulares, durante processo de amadurecimento, senescência e deterioração, entretanto, há variabilidade de conservabilidade entre as cultivares (MORETTI et al, 2000;KHOKHAR, 2009).…”

Section: Resultsunclassified

Alterações físicas e químicas em cebolas armazenadas sob refrigeração

et al. 2012

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Section: Resultsunclassified

Alterações físicas e químicas em cebolas armazenadas sob refrigeração

et al. 2012

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“…The highest percentage of bolting was observed when onion sets were stored for the longest period of 90 days at 10˚C followed by the shortest period of 10 days at 30˚C or when stored at 10˚C for 90 days [25]. The bolting was substantially increased by lower storage temperature of 5˚C while higher temperatures (25˚C or 30˚C) suppressed/delayed bolting and subsequent floret opening [31]. Experiments, in which cold treatments at different temperature levels were compared, showed a progressive decrease in flowering with increase in temperature [12] [52].…”

Section: Bulb/set Size and Storage Temperaturementioning

confidence: 94%

“…"Rijnsburger Balstora", where initiation took place at 11˚C to 18.9˚C after 162 to 185 days [18]. Time of flowering may be influenced by the temperature used for cold storage, and also by date of planting [3] [9] [11] [26]- [31]. Storage temperatures between 0˚C -12˚C and early planting lead to earlier flowering [11] [31].…”

Section: Vernalizationmentioning

confidence: 99%

“…Time of flowering may be influenced by the temperature used for cold storage, and also by date of planting [3] [9] [11] [26]- [31]. Storage temperatures between 0˚C -12˚C and early planting lead to earlier flowering [11] [31]. Percent flowering plant was significantly increased with the durational increase in cold treatment at 5˚C [32].…”

Section: Vernalizationmentioning

confidence: 99%

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Flowering and Seed Development in Onion—A Review

Khokhar¹

2014

OALib

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Proper vernalization temperature of mother onion bulbs stimulates early flowering and produces a heavier yield of seed. Moreover, onion cultivars seem to differ in their optimal temperature requirements depending on the locality to which they are adapted. Most studies on the effects of storage temperature on inflorescence initiation in onion have shown that the optimum temperature for flowering is in a range between 5˚C to 13˚C for 90 to 120 days and bolting resistant varieties require a longer cold stimulus (154 -185 days) in comparison to normal spring sown cultivars. Flowering is greatly reduced or suppressed at temperatures in the range of 15.5˚C -30˚C and low temperatures of −3˚C to 0˚C. Studies on both bulbs and seedlings have shown that, depending on genotype, flower initiation starts only after a juvenile phase, when the plant has a minimum number of 4 -14 leaves, including leaf initials. The initiation of inflorescence is favoured by a large set or bulb size. The post planting environmental conditions greatly affect bolting percentage of bulbs stored at an inductive temperature. Maximum seed yield in onion has been reported from large mother bulbs and early planting time. The emergence of inflorescence is faster at high temperatures (20˚C -30˚C) and long days (14 -16 hours).

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“…For seed production, however, plants may be propagated either from seeds or from bulbs (Nikus & Mulugeta, ). In India, the majority of farmers prefer seed‐based cultivation (Acosta et al ., ; Khokhar, ) to avoid the longer duration and higher costs associated with bulb‐based propagation. Farmers typically use 6–8 kg ha −1 of seeds for cultivation (Nikus & Mulugeta, ).…”

Section: Introductionmentioning

confidence: 99%

A definitive method for distinguishing cultivated onion from its weedy mimic, Asphodelus fistulosus, at multiple developmental stages

Ughade¹,

Khilare²,

Sangale

et al. 2018

Weed Research

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The onion, Allium cepa, is an important vegetable crop around the world. Globally, India ranks second in onion production, but yields are often much lower than in many other onion producing countries. This study reports on one major contributing factor to low onion yields in India: the presence of a weedy mimic that is morphologically similar to onion until the onset of flowering. We used morphological and molecular methods to identify this mimic as Asphodelus fistulosus, an exotic weed not previously reported in India. Our study indicated that molecular markers derived from the rbcL and/or matK chloroplast genes in a DNA barcoding approach allow accurate identification of this weed using any tissue and even at early developmental stages. Our results also showed that visual examination of seed lots coupled with DNA barcoding analysis of samples of 5-10 individual seeds can be used to confirm identification. The ability to easily identify contaminating material before and during cultivation can allow farmers to minimise production losses and prevent further spreading of this weed.

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Effect of set-size and storage temperature on bolting, bulbing and seed yield in two onion cultivars

Cited by 26 publications

References 17 publications

Alterações físicas e químicas em cebolas armazenadas sob refrigeração

Alterações físicas e químicas em cebolas armazenadas sob refrigeração

Flowering and Seed Development in Onion—A Review

A definitive method for distinguishing cultivated onion from its weedy mimic, Asphodelus fistulosus, at multiple developmental stages

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