Types of Sex Determination in Parasitoids

Entomology IGKV CET JRF

Types of Sex Determination in Parasitoids

Sex Determination in Parasitoids :

Progeny or offspring which may be either male or female or haploid or diploid in parasitoids which  depends on their types of sex determination

1.Arrehenotoky – A common form of sex determination observed in hymenoptera in which Progeny are Produced by mated or unmated females,but fertilized eggs produce diploid female offspring where unfertilized eggs produces diploid female offspring where unfertilized eggs produce haploid male offspring.

Fertilized eggs- Diploid female

Unfertilized eggs- Haploid male

E.g.- Trichogramma spp. , Telinomous spp.

2. Thelytoky (Uniparental)– A from of sex determinatin in which only diploid female progenies are produced without males as seen especially in Hymenoptera

Diploid females- Offspring (Without Male)

E.g.-Chilonis blackburni (Egg parasitoids of cotton boll worm )

3. Quatertoky (Amphrotocus) – Its A type of parasitoids activity determine sex progeny.Cause of uniparental of Produce Progeny by environmental conditions

E.g.- 25C- Only male 

30C- Only female

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