scholarly journals Genetic Control of Flowering Time in Rice, a Short-Day Plant

2001 ◽  
Vol 127 (4) ◽  
pp. 1425-1429 ◽  
Author(s):  
Masahiro Yano ◽  
Shoko Kojima ◽  
Yuji Takahashi ◽  
Hongxuan Lin ◽  
Takuji Sasaki
Keyword(s):  
Flowering Time ◽  
Genetic Control ◽  
Short Day

VrLELP controls flowering time under short-day conditions in Arabidopsis

2020 ◽  
Author(s):  
Renxing Shi ◽  
Wenying Xu ◽  
Tong Liu ◽  
Chunmei Cai ◽  
Shuai Li
Keyword(s):  
Flowering Time ◽  
Short Day

scholarly journals Managing flowering time in Miscanthus and sugarcane to facilitate intra- and intergeneric crosses

PLoS ONE ◽  
2021 ◽  
Vol 16 (1) ◽  
pp. e0240390
Author(s):  
Hongxu Dong ◽  
Lindsay V. Clark ◽  
Xiaoli Jin ◽  
Kossonou Anzoua ◽  
Larisa Bagmet ◽  
...  
Keyword(s):  
Flowering Time ◽  
High Latitude ◽  
Floral Induction ◽  
Day Treatment ◽  
Day Length ◽  
Close Relative ◽  
Short Day ◽  
Culm Length ◽  
Low Latitudes ◽  
Short Days

Miscanthus is a close relative of Saccharum and a potentially valuable genetic resource for improving sugarcane. Differences in flowering time within and between Miscanthus and Saccharum hinders intra- and interspecific hybridizations. A series of greenhouse experiments were conducted over three years to determine how to synchronize flowering time of Saccharum and Miscanthus genotypes. We found that day length was an important factor influencing when Miscanthus and Saccharum flowered. Sugarcane could be induced to flower in a central Illinois greenhouse using supplemental lighting to reduce the rate at which days shortened during the autumn and winter to 1 min d-1, which allowed us to synchronize the flowering of some sugarcane genotypes with Miscanthus genotypes primarily from low latitudes. In a complementary growth chamber experiment, we evaluated 33 Miscanthus genotypes, including 28 M. sinensis, 2 M. floridulus, and 3 M. ×giganteus collected from 20.9° S to 44.9° N for response to three day lengths (10 h, 12.5 h, and 15 h). High latitude-adapted M. sinensis flowered mainly under 15 h days, but unexpectedly, short days resulted in short, stocky plants that did not flower; in some cases, flag leaves developed under short days but heading did not occur. In contrast, for M. sinensis and M. floridulus from low latitudes, shorter day lengths typically resulted in earlier flowering, and for some low latitude genotypes, 15 h days resulted in no flowering. However, the highest ratio of reproductive shoots to total number of culms was typically observed for 12.5 h or 15 h days. Latitude of origin was significantly associated with culm length, and the shorter the days, the stronger the relationship. Nearly all entries achieved maximal culm length under the 15 h treatment, but the nearer to the equator an accession originated, the less of a difference in culm length between the short-day treatments and the 15 h day treatment. Under short days, short culms for high-latitude accessions was achieved by different physiological mechanisms for M. sinensis genetic groups from the mainland in comparison to those from Japan; for mainland accessions, the mechanism was reduced internode length, whereas for Japanese accessions the phyllochron under short days was greater than under long days. Thus, for M. sinensis, short days typically hastened floral induction, consistent with the expectations for a facultative short-day plant. However, for high latitude accessions of M. sinensis, days less than 12.5 h also signaled that plants should prepare for winter by producing many short culms with limited elongation and development; moreover, this response was also epistatic to flowering. Thus, to flower M. sinensis that originates from high latitudes synchronously with sugarcane, the former needs day lengths >12.5 h (perhaps as high as 15 h), whereas that the latter needs day lengths <12.5 h.

Reproductive Biology and Floral Phenologies of the Sympatric Species Leptospermum myrsinoides and L. continentale (Myrtaceae)

1993 ◽  
Vol 41 (5) ◽  
pp. 527 ◽  
Author(s):  
SP Obrien ◽  
DM Calder
Keyword(s):  
Flowering Time ◽  
Genetic Control ◽  
Reproductive Biology ◽  
Pollen Viability ◽  
Sympatric Species ◽  
Anther Dehiscence ◽  
Floral Structure ◽  
Days After Anthesis ◽  
Degree Of Overlap

The reproductive biology and floral phenologies of co-occurring Leptospermum myrsinoides and L. continentale were investigated. Both species have similar floral structure and both are protandrous. Anther dehiscence is staggered over approximately 6 days and pollen viability remains high for at least 3 days. The styles of both species are short at anthesis but extend during the next 6 days to approximately the same height as the anthers. The stigmas of these species do not achieve maximum receptivity until at least 4 days after anthesis. Both species are self-compatible. At the three sites studied, L. myrsinoides and L. continentale have separate flowering times with L. myrsinoides always flowering first. Within populations of each species, plants reached first flower and peak flower in the same order in 1989 and 1990, implying genetic control over flowering time. It is suggested that protandry in these species enhances the likelihood of outcrossing and the staggered release of pollen coupled with the degree of overlap within flowering populations increases the number of potential mates available to each flower.

Effects of different photoperiods on flowering time of facultative short day ornamental annuals

2010 ◽  
Vol 12 (01) ◽  
pp. 10-15
Author(s):  
JalalUdDin Baloch ◽  
M. Qasim Khan ◽  
M. Munir ◽  
M. Zubair
Keyword(s):  
Flowering Time ◽  
Short Day

The influence of different daylengths on ear emergence and seed setting in oats

1961 ◽  
Vol 57 (2) ◽  
pp. 279-288 ◽  
Author(s):  
D. J. Griffiths
Keyword(s):  
Genetic Control ◽  
Geographical Distribution ◽  
Geographic Origin ◽  
Seed Setting ◽  
Region Of Origin ◽  
Short Day ◽  
Selection Experiments ◽  
Close Relationship ◽  
Floral Differentiation ◽  
Photoperiodic Responses

1. The study of the photoperiodic responses of varieties and forms of the genus Avena has revealed considerable diversity within the group.2. The investigation of a number of forms differing in geographical distribution confirms the close relationship between photoperiodism and region of origin. There appears to exist a definite relationship between the geographic origin of a given form and the limits of its tolerance to short day. The forms from the more southerly latitudes suffered less from short day than those of northern origin.3. Panicle exsertion was entirely suppressed under photoperiods of 12 hr. and less in A. sativa varieties Victory, S. 84 and Black Supreme, which have been selected for high yielding ability in more northerly latitudes.4. Plants which failed to produce exserted panicles in varietal tests were dissected, and it was found that floral differentiation had not been inhibited by the shortened photoperiods, but that the full elongation of the internodes, especially the upper internodes, had been suppressed.5. Selection experiments with progenies of the cross Wintok × A.fatna form Cc 3872 grown under different photoperiods confirmed a highly selective response to daylength, thus indicating that this response is under genetic control.

scholarly journals Comparison of GWAS models to identify non-additive genetic control of flowering time in sunflower hybrids

2017 ◽  
Vol 131 (2) ◽  
pp. 319-332 ◽  
Author(s):  
Fanny Bonnafous ◽  
Ghislain Fievet ◽  
Nicolas Blanchet ◽  
Marie-Claude Boniface ◽  
Sébastien Carrère ◽  
...  
Keyword(s):  
Flowering Time ◽  
Genetic Control

Unravelling the genetic control of flowering time in the bioenergy grass Miscanthus

2008 ◽  
Vol 150 (3) ◽  
pp. S181 ◽  
Author(s):  
E. Jensen ◽  
S. Thomas-Jones ◽  
K. Farrar ◽  
J. Clifton-Brown ◽  
I. Donnison
Keyword(s):  
Flowering Time ◽  
Genetic Control

scholarly journals Genetic Control and Comparative Genomic Analysis of Flowering Time in Setaria (Poaceae)

2013 ◽  
Vol 3 (2) ◽  
pp. 283-295 ◽  
Author(s):  
Margarita Mauro-Herrera ◽  
Xuewen Wang ◽  
Hugues Barbier ◽  
Thomas P. Brutnell ◽  
Katrien M. Devos ◽  
...  
Keyword(s):  
Flowering Time ◽  
Genetic Control ◽  
Genomic Analysis ◽  
Comparative Genomic Analysis ◽  
Comparative Genomic

scholarly journals Comparison of GWAS models to identify non-additive genetic control of flowering time in sunflower hybrids

2017 ◽  
Author(s):  
Fanny Bonnafous ◽  
Ghislain Fievet ◽  
Nicolas Blanchet ◽  
Marie-Claude Boniface ◽  
Sébastien Carrère ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Flowering Time ◽  
Genetic Control ◽  
Quantitative Trait ◽  
Complex Traits ◽  
Association Studies ◽  
Additive Models ◽  
Genome Wide Association Studies ◽  
Trait Loci ◽  
Genomic Regions

AbstractGenome-wide association studies are a powerful and widely used tool to decipher the genetic control of complex traits. One of the main challenges for hybrid crops, such as maize or sunflower, is to model the hybrid vigor in the linear mixed models, considering the relatedness between individuals. Here, we compared two additive and three non-additive association models for their ability to identify genomic regions associated with flowering time in sunflower hybrids. A panel of 452 sunflower hybrids, corresponding to incomplete crossing between 36 male lines and 36 female lines, was phenotyped in five environments and genotyped for 2,204,423 SNPs. Intra-locus effects were estimated in multi-locus models to detect genomic regions associated with flowering time using the different models. Thirteen quantitative trait loci were identified in total, two with both model categories and one with only non-additive models. A quantitative trait loci on LG09, detected by both the additive and non-additive models, is located near a GAI homolog and is presented in detail. Overall, this study shows the added value of non-additive modeling of allelic effects for identifying genomic regions that control traits of interest and that could participate in the heterosis observed in hybrids.

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