A Database of Drosophila Genes & Genomes

FB2012_01, released January 20th, 2012
 

Dmel\P{PZ}fru3 Insertion

General Information
Symbol Dmel\P{PZ}fru3 Species D. melanogaster
Name FlyBase ID FBti0003599
Feature type transposable_element_insertion_site
Description
Inserted element P{PZ} Expression data
Affected gene(s) Ecol\lacZ, fru Viability / fertility
Causes allele(s) Ecol\lacZfru-3, fru3 Stock availability 1 publicly available
LINE ID ms(3)06411
Genomic Location
Chromosomal location 3R ( 91A7-91B3 ) Sequence location
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FB2012_01
FB2011_10
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hide Detailed Mapping Data
Chromosome (arm)
Sequence Location
Orientation
Cytological location
(computed by FlyBase)
91A7-91B3 ( near gene of known cytology )
Cytological location
(reported)
91B1-91B8 (in situ hybridization reported)
Comments concerning
location
hide Sequence Data
Flanking sequence
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Construct P{PZ}
Location-dependent
role
lacZ enhancer trap
Size 14.545Kb
Associated alleles
Molecular map
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Insertion may
affect gene
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Causes alleles
Lethality
References
Sterility
References
male semi-sterile | recessive
male sterile | partially
male sterile | recessive
semi-fertile
semi-fertile | male
hide Phenotype Manifest In
male accessory gland
vas deferens
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Statement
Reference
fru[3] mutant males display active intermale courtship. When subjected to daily ethanol exposure, the courtship level of fru[3] males is decreased on the first exposure and then remains unchanged on subsequent exposure. the intermale courtship level of fru[3] males is significantly lower than that of CS control males on the third exposure.
The Muscle of Lawrence fails to differentiate in 90% of fru[3] homozygous mutants, with the remaining 10% exhibiting only a vestigial muscle of Lawrence. Flies transheterozygous for fru[ΔC] and fru[3] exhibit approximately 33% fertility compared to wild-type. They do not experience reduced viability. These flies also exhibit reduced courting of females while displaying higher levels of intermale courtship and chaining. The muscle of Lawrence fails to differentiate in 90% of cases, with the remaining 10% exhibiting only a vestigial muscle of Lawrence. fru[ΔC]/fru[3] transheterozygotes exhibit a reduced number of male serotonergic neurons and improper patterning. The dorsal serotonergic abdominal giant neurons (dSAbg) exhibits approximately 18%, and the ventral serotonergic abdominal giant neurons (vSAbg) approximately 6% of the normal complement of serotonergic neurons. At least one or the other of these clusters is absent in a significant portion of these males; the vSAbg is undetectable in approximately 70%, whereas approximately 22% exhibit no dSAbg. In animals lacking the vSAbg, the remaining dSAbg neurons innervate the vas deferens, accessory glands, and ejaculatory duct. Similarly, in animals with no dSAbg, the same target organs are innervated by neurons of the vSAbg. In animals with only one cluster, while the innervation of the vas deferens is wild-type in pattern, the innervations are less dense. Similar observations are found for the accessory glands and ejaculatory duct. Unlike wild-type males, 90% of accessory glands are not fully innervated and a further 5% have no innervation. This phenotype is repeated with the vas deferens. These males experience a 8.5% decrease in fru[M]-labelled neurons compared to wild-type. During a 6hr observation, fru[ΔC]/fru[3] males do not mate, whereas approximately 50% of fru[ΔC]/fru[3] males expressing fru[MC.Scer\UAS.cSa] do. These males are slower to initiate mating, although the duration of copulation is similar to that of wild-type males. A small number of control flies (i.e. fru[MC.Scer\UAS.cSa]/+ ; fru[ΔC]/fru[3]) manage to mate within the same time as the \'rescued\' males, probably due to \'leakage\' of the transgene, although mating durations are still significantly longer than those of wild-type males.
Expression of fru[MA.Scer\UAS.cSa], fru[MB.Scer\UAS.cSa], or fru[MC.Scer\UAS.cSa], under the control of Scer\GAL4[fru.16] in a fru[3]/fru[3] background does not restore male fertility. However, expression of fru[MC.Scer\UAS.cSa] in a fru[3]/fru[ΔC] background (in which fru[MA] and fru[MB], but not the fru[MC] transcript are present) increases the percentage of fertile males from 33 to 78% of wild-type levels. Extension of mating length beyond normal duration in fru[3]/fru[3] mutants is rescued by expression of fru[MC.Scer\UAS.cSa] via Scer\GAL4[fru.16]. Expression of fru[MA.Scer\UAS.cSa] or fru[MB.Scer\UAS.cSa] under the control of Scer\GAL4[fru.16] fails to rescue fertility levels in fru[3]/fru[ΔC] mutants. Expression of fru[MC.Scer\UAS.cSa] under the control of Scer\GAL4[fru.16] in fru[3] homozygotes and fru[3]/fru[ΔC] transheterozygotes rescues the formation of the muscle of Lawrence in the male and induces formation of muscle of Lawrence-like features and neuromuscular junctions in the female. This also rescues formation of the dorsal serotonergic abdominal giant neuron cluster. In some cases, the ventral serotonergic abdominal giant neuron cluster is also rescued. Expression of either fru[MA.Scer\UAS.cSa] or fru[MB.Scer\UAS.cSa] under the control of Scer\GAL4[fru.16], in fru[3] homozygotes and fru[3]/fru[ΔC] transheterozygotes fails to rescue the formation of the muscle of Lawrence in the male and fails to induce formation of muscle of Lawrence-like features and neuromuscular junctions in the female. Expression of fru[MA.Scer\UAS.cSa] under the control of Scer\GAL4[fru.16] does not significantly rescue differentiation of the male serotonergic neurons in fru[ΔC]/fru[3] mutants. Expression of fru[MB.Scer\UAS.cSa] under the control of Scer\GAL4[fru.16] in fru[ΔC]/fru[3] mutants induces differentiation of neurons in the dorsal serotonergic abdominal giant neurons, with up to five neurons (half the wild-type number) developing per animal. Rescue in the ventral serotonergic abdominal giant neurons is not observed. Extension of mating length beyond normal duration in fru[ΔC]/fru[3] males is rescued by targeted expression of fru[MC.Scer\UAS.cSa] via Scer\GAL4[fru.16].
Expression of Agam\fru[MC.Scer\UAS] under the control of Scer\GAL4[fru.16], in a fru[3]/fru[ΔC] background (in which fru[MA] and fru[MB], but not the fru[MC] transcript are present) increases the percentage of fertile males from 33 to 65% of wild-type levels. Expression of Agam\fru[MC.Scer\UAS] under the control of Scer\GAL4[fru.16], in a fru[3]/fru[ΔC] background (in which fru[MA] and fru[MB], but not the fru[MC] transcript are present) rescues the formation of the muscle of Lawrence in the male. Expression of Agam\fru[MC.Scer\UAS] under the control of Scer\GAL4[fru.16] in fru[ΔC]/fru[3] mutants induces differentiation of neurons in both male serotonergic abdominal giant neuron clusters.
Expression of Agam\fru[MC.Scer\UAS] under the control of Scer\GAL4[fru.16] is sufficient to suppress the Muscle of Lawrence(MOL)-less phenotype of fru[3] mutant males and to induce formation of a MOL-like muscle in females.
fru3/fru4-40 males exhibit very little courtship behaviour towards females and show a small but significant increase in courtship of other males compared to wild-type. Unlike wild-type males, these mutant males form male mating chains.
The male-female courtship index and fertility of fruGAL4/fru3 males is significantly reduced compared to wild-type. These males court single wild-type males and form chains with males of their own genotype.
The addition of to1/to1 to fru3/+ leads to a significant reduction in courtship index. Although reduced courtship is not abolished, Mutant males are capable of all stages of courtship, but perform less frequently. This reduction is not caused by a reduction in general activity. The addition of the fru carrying Tp(3;Y)A81 or Tp(3;Y)L58 rescues this enhancement phenotype.
23% of fru0-1/fru3 males are fertile. Male-female courtship as measured by courtship index (CI) or wing extension index (WEI) is almost completely abolished in fru3/fruw9, fru3/Df(3R)fruw24, fru3/fruw27 or fru3/fru4-40 males. fru3/fru4-40 males show significant male-male courtship as measured by CI. fru3/fruw9, fru3/fruw12, fru3/Df(3R)fruw24 or fru3/fru4-40 males show substantial chaining. fru3/Df(3R)fruw24, fru3/fruw27 and fru3/fru4-40 males do not produce a courtship song even though they show a small amount of wing extension.
Expression of 5-HT in serotonergic-abdominal ganglion neurons in adult males is absent.
fru1/fru3 males mated individually to a single virgin female show vigorous courtship behaviour, comparable to that of wild-type males. High levels of abdominal bending are seen in the males that show courtship behaviour. However, the proportion of males that mate is reduced compared to wild type; 30% of the transheterozygous males court but do not mate. The fertility of the males (as assayed by the ability of the mated females to produce progeny) is reduced compared to wild-type males. The transheterozygous males show longer than normal mating-initiation latencies compared to heterozygous controls. Mating duration is also longer than normal and shows a far more scattered distribution than that of wild-type males. The number of progeny (number of resulting pupae) obtained from a fertile mating between a fru1/fru3 male and a wild-type female are not slightly but significantly fewer compared with wild type. An appreciable fraction of matings by fru1/fru3 males lead to subnormal quantities of sperm being transferred to the female.
Homozygous males show high levels of head-to-head interactions compared to wild-type males. Most of these would-be aggressive actions involve bringing their heads together but not escalating the interactions into the rising-up and boxing motions that are displayed by wild-type males. The level of head-to-head interactions shows a temporal dependency; when males are grouped together on the day they eclose they do not show significantly higher than normal head-to-head interactions, but the frequency of head-to-head interactions shows a marked increase beginning on day 2 and peaking on days 4-5. Mutant males aged individually for 5-7 days and then grouped together show low levels of head-to-head interactions 1 day after being grouped together, but show an increase in the frequency of head-to-head interactions by days 4-5. These flies (which were aged individually) show lower levels of head-to-head interactions compared to mutant males that have been aged for essentially the same number of days, but in the presence of other males since eclosion, indicating a social component in the phenotype. Mutant males show some chaining behaviour. Chaining also show temporal dependence, with the frequency of chaining showing a marked increase beginning on day 2 and peaking on days 4-5.
Males are less stimulated to court females than fru1 or fru0-1 and display less chaining behaviour than fru1 males. Some males that exhibit courtship do exhibit tapping behaviour (tapping of the female with the forelegs). No courtship song pulse is generated, even though they perform rare and unsustained wing extensions. The anomalous wing usage exhibited is not due to a general thoracic etiology, such as a defect in neuromuscular morphology or physiology. Homozygous and transheterozygous males with fru4 exhibit complete behavioural sterility, failure to attempt copulation. Males, when presented with both sexes simultaneously, will show a courtship bias toward males. Chaining behaviour exhibited by males is displayed mostly on the food surface. Courtship song is not required for, nor is particularly correlated with, chain formation. The behaviour of fru3/fru4 males is very similar to that of either homozygote. Males lack the Muscle of Lawrence (MOL). Subnormal levels of courtship are not related to any drop in activity or viability. Mutant females are courted by wild-type males at normal levels.
Males lack the muscle of Lawrence.
Males court indiscriminately, fail to copulate and have muscle of Lawrence defects. Males show very little wing extension and the wing displays generate no song pulse signals (courtship specific as flight is normal). fru3/fruw12 males barely court at all but show normal locomotor activity. Mutant combination shows some male-male chaining. Early and late steps of courtship are disrupted.
In fru3 homozygotes the number of adult muscle nuclei per fibre is greater than that for other fru- mutants but there are fewer nuclei in muscle of Lawrence (MOL)-position fibres than medial fibres or wild-type male MOL fibres. The number of myoblasts in unaffected.
Males court males and females but fail to mate. Male specific abdominal muscle is reduced.
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Reporter Expression
Additional Information
Statement
Reference
Marker for
Reflects
expression of
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Line ID
Origin as a multiple insertion line
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Aberration
Balancer
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Bloomington
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Reported As
Symbol Synonym
P{ry+t7.2=PZ}fru3
Secondary FlyBase IDs
  • FBti0000231
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