Gradient of vernalization requirement in carrot cultivars from diverse geographical origins

Crop Science ◽  
2021 ◽  
Author(s):  
Josefina Wohlfeiler ◽  
María Soledad Alessandro ◽  
Pablo Federico Cavagnaro ◽  
Claudio Rómulo Galmarini
Keyword(s):  
Vernalization Requirement

Mapping loci controlling vernalization requirement in Brassica rapa

1995 ◽  
Vol 91 (8) ◽  
pp. 1279-1283 ◽  
Author(s):  
R. A. Teutonico ◽  
T. C. Osborn
Keyword(s):  
Brassica Rapa ◽  
Vernalization Requirement

Relationship between vernalization requirement and winter hardiness in doubled haploids of barley

Euphytica ◽  
1989 ◽  
Vol 42 (3) ◽  
pp. 209-213 ◽  
Author(s):  
Hans Doll ◽  
Vagner Haahr ◽  
Bodil Søgaard
Keyword(s):  
Doubled Haploids ◽  
Winter Hardiness ◽  
Vernalization Requirement

scholarly journals Vernalization Response of Some Winter Wheat Cultivars (Triticum aestivum L.)

2012 ◽  
Vol 38 (No. 3-4) ◽  
pp. 97-103 ◽  
Author(s):  
J. Košner ◽  
K. Pánková
Keyword(s):  
Triticum Aestivum ◽  
Winter Wheat ◽  
Agronomic Traits ◽  
Triticum Aestivum L ◽  
Vernalization Requirement ◽  
Photoperiod Response ◽  
Vernalization Response ◽  
Multiple Alleles ◽  
Winter Wheat Cultivars ◽  
The Given

For 17 cultivars of winter wheat (Triticum aestivum L.) different vernalization and photoperiod responses were detected. The effect of photoperiod sensitivity was not significantly changed by vernalization; different vernalization responses were probably due to the presence of multiple alleles at Vrn loci. The delay in heading depended on the vernalization deficit exponentially: y = Parameter (1) + (y0 – Parameter (1)) × EXP (Parameter (2) × (x – x0)). The dependence was shown to be general and significant for the given model in all the studied cultivars. Individual regressions characterised responses of cultivars to a deficit of vernalization treatment. Cluster analysis according to the characterisation obtained (full vernalization requirement, minimum vernalization requirement, insufficient vernalization and parameters of the dependence) showed the relationships between cultivars and enabled their grouping by similar profiles of vernalization, and, possibly, of photoperiod response. In individual cultivars, an attempt was made to use the model to predict performance for some agronomic traits.

Relationships between the times of transplanting, curd initiation and maturity in cauliflower

1990 ◽  
Vol 114 (2) ◽  
pp. 193-199 ◽  
Author(s):  
D. C. E. Wurr ◽  
J. R. Fellows ◽  
R. W. P. Hiron
Keyword(s):  
Large Deviations ◽  
Annual Variation ◽  
Crop Growth ◽  
Planting Date ◽  
Combined Effect ◽  
Vernalization Requirement ◽  
Complementary Technique ◽  
Number Of Leaves ◽  
The Times ◽  
Crop Maturity

SUMMARYIn order to determine the accuracy of controlling the time of maturity of a cauliflower crop by regulating the planting date, a series of transplantings of the variety White Fox was grown on a range of sites over 3 years and sampled throughout growth.The time from transplanting to maturity and the time from curd initiation to maturity were both quadratically related to the time of transplanting but there were marked differences in the relationships between years. Differences between years in the time taken to reach maturity tended to increase with later transplanting; for example, cauliflower crops transplanted in May took between 77 and 94 days to mature, while those transplanted in July matured in as few as 67 or as many as 106 days. These differences resulted from a combined effect of the time taken to satisfy the vernalization requirement and the duration of curd growth, both of which are temperature-mediated and therefore subject to seasonal and annual variation. Differences in the vernalization requirements of different cauliflower crops are illustrated by the number of leaves formed before curd initiation, which varied from 22·5 to 37·3.Variation in the time to maturity between crops transplanted at similar times of the year, in the same and different years, resulted in large deviations from planned production programmes and it is suggested that a complementary technique to aid crop marketing would be prediction of the time of crop maturity. However, the data collected in this study show that predictions based on the duration of crop growth from transplanting or curd initiation are unlikely to be sufficiently accurate and it is argued that predictions should be based on changes in curd dimensions with time.

Polymorphism for vernalization requirement in a population of Avena fatua

1986 ◽  
Vol 64 (4) ◽  
pp. 730-733 ◽  
Author(s):  
H. Darmency ◽  
C. Aujas
Keyword(s):  
Avena Fatua ◽  
Early Flowering ◽  
Vernalization Requirement ◽  
Late Flowering ◽  
Type Formula ◽  
Winter Type ◽  
Beneficial Effects ◽  
Wild Oats ◽  
Spring Type ◽  
Germinating Seeds

Polymorphism for vernalization requirement has been observed within a population of wild oats, Avena fatua L., grown under greenhouse conditions. One group of plants was early flowering ("spring type," [Formula: see text]), whereas another was late flowering ("winter type," [Formula: see text]). Vernalization of the winter type was obtained by germinating seeds for 2 weeks at 4 °C and resulted in shortening the time to heading by 50 days. However, this polymorphism was not observed in the field when plants germinated before mid-May. Hence, vernalization requirements did not appear to have any adverse or beneficial effects on time to heading and may be a neutral character in this population. Nevertheless, the frequency of the winter type in the population increased significantly over 6 years. Mechanisms are suggested to account for this phenomenon.

Flowering responses to vernalization and photoperiod in annual medics (Medicago spp.)

1975 ◽  
Vol 26 (5) ◽  
pp. 831 ◽  
Author(s):  
NM Clarkson ◽  
JS Russell
Keyword(s):  
High Temperature ◽  
Flowering Time ◽  
Vernalization Requirement ◽  
Vernalization Response ◽  
The Third ◽  
Long Day ◽  
Temperature Requirement ◽  
New Finding ◽  
Annual Medics

The three processes thought to control flowering times in annual medics (Medicago spp.) are a vernalization requirement, a long day requirement and a high temperature requirement. To examine the first two processes, seed of seven cultivars of six species was vernalized at 1�C for periods of up to 11 weeks, then grown to flowering under three photoperiods in a glasshouse. To study the third process, the time to flowering of selected treatments from this expcrirnent was compared with flowering data from plants grown in the field at a range of temperatures lower than in the glasshouse. Vernalization and photoperiod caused large shifts in flowering time but the effects varied widely among species. M. scutellata was almost insensitive to both factors but in M. rugosa acceleration of up to 91 days was caused by treatment. Vernalization and short dark periods were additive in accelerating flowering and largely able to substitute for each other. Species flowered almost simultaneously when given their most favourable conditions for flowering. High temperature accelerated flowering in all species studied. However, in species other than M. scutellata it was necessary for a vernalization requirement to be met before this effect was observed. A new finding was that the vernalization response in M. truncatula and M. littoralis was largely reversed after more than 7 weeks of vernalization. This suggests a previously undetected flowering mechanism in these species.

Sign in / Sign up

Export Citation Format

Share Document