Cytogenetic Profile of Rajapalayam Dog Breed of Southern India

Raja, K. N.; Saravanan, R.; Devendran, P.; Singh, P. K.; Mishra, Anil Kumar; Ganguly, Indrajit

doi:10.18805/ijar.v0iof.9170

Cited by 2 publications

(2 citation statements)

References 5 publications

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“…Aspects of reproductive behavior of the dog, Canis familiaris, in general, have been studied rather extensively [21,22], although the Rajapalayam breed has been largely ignored. Raja et al [2] investigated the cytogenetic profile of this dog to throw some light on chromosomal abnormalities that would affect growth and fertility. Based on a morphometric analysis, it was indicated that the Rajapalayam dog population has been declining and the purity of the breed is at risk requiring conservation measures [1].…”

Section: Introductionmentioning

confidence: 99%

Identification of urinary sex pheromones in female Rajapalayam breed dog and their influence on stud male reproductive behaviour

Rajagopal¹,

Dhivya²,

Ponmanickam³

et al. 2022

J App Biol Biotech

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The dog has been a good companion animal to humans. Companionship, security, hunting, and herding are their best utilities for the owner. The amazing sense of smell of some of the breeds of dogs is taken to advantage to train for accurately tracking and sniffing out criminals. The heralding and tracking efficiencies of the majestic Rajapalayam breed of dog are outstanding but little is documented about the reproductive status of females through volatile compounds to which the males respond appropriately to facilitate sexual attraction and mating of this breed. Therefore, the present study was carried out to investigate the reproductive behaviors and urinary volatiles at various stages of the estrous cycle. The repeated behaviors such as approach, attempted investigation, investigation, premount contact, and mounting were significantly higher in male dogs exposed to females in estrus. By contrast, such reproductive behaviors were totally absent in males exposed to females in post-estrus. Pre-copulatory behaviors and urinary volatiles of female dogs were hypothesized to be the guiding/exhibitioner factors. As many as, 30 urinary volatile compounds were identified during the estrous cycle. Among these, 2-methyl-hexadecane, 3-methylene-4methypentan-1-ol, (E)-9-methyl-7-undecenoic acid, 4,5-dimethyl-4-hexen-2-one, and 2-octyldodecan-1-ol were specific to estrus phase. Behavioral observation clearly revealed that stud males exhibited the highest attraction to females, with repeated attempts of investigation, actual investigation, mounting, and penile erection being significantly high toward estrus urine sample as well as mixture of synthetic estrus-specific volatile compounds. However, proestrus-specific 2, 3-dimethyl-1-butanol and postestrus-specific pentadecane did not evoke such sexual behaviors in male dogs. It is concluded that the female dog in estrus phase releases specific volatiles chemicals in the urine, which is instrumental in provoking the manifestations of premating behaviors in male dogs. Thus, the present study provides evidence that non-invasive methods such as assessment of behaviors and estrus-specific urinary volatiles would serve as good for detection of estrus in the Rajapalayam dog. Among the volatiles identified in estrus urine, based on the behavioral assay, urinary (E)-9-methyl-7-undecenoic acid proves to be the most effective male-attracting pheromone in the female dog. Thus, the present study provides evidence to the effect that assessment of male behaviors to estrusspecific urinary volatiles can facilitate detection of estrus in the Rajapalayam dog so as to precisely time the mating.

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Section: Introductionmentioning

confidence: 99%

Identification of urinary sex pheromones in female Rajapalayam breed dog and their influence on stud male reproductive behaviour

Rajagopal¹,

Dhivya²,

Ponmanickam³

et al. 2022

J App Biol Biotech

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“…There exists great diversity of domestic animal breeds in India (Raja et al 2017). During the last two decades, there has been an increased thrust to recognize different breeds of animals leading to an increase in documented breeds and varieties.…”

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confidence: 99%

Phenotypic characterization and documentation of Gaddi dog of western Himalayan region of India

Sankhyan

Thakur

Dogra

et al. 2022

Indian J of Anim Sci

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India has the privilege of having excellent dog populations, but efforts to recognize them as distinct breeds are far and wide. The present study was designed to undertake the phenotypic characterization of Gaddi dogs, in Himalayan region of the state of Himachal Pradesh, India. The approach used was to gather as much information available on Gaddi dogs from communities involved in their traditional rearing. Though, many anecdotal evidence about its origin exists, the most plausible relates it to the development of this distinct breed by Gaddi shepherds during migration in Himalayan ranges. The Gaddi dogs are predominately black with occasional white marking on the feet, tail, or trunk region. One of their main attributes is their massive, arched neck that protects them from predators. These dogs have harmonious build, medium stature, moderately long, robust muscular body. In bitches, age at first estrus ranged from 12-18 months with main breeding season from September to November. The number of whelping in a lifetime was reported to be 8-12 with a litter size of 4-8 pups. Shepherds usually do not follow a strict vaccination or deworming schedule of the dogs and housing is also not provided. The dog is primarily developed and used for the herding of sheep and goats by shepherds of the Gaddi tribe. These shepherds must be rewarded and encouraged to maintain the purity of the breed. The present study paved the way for recognition of the Gaddi dog and highlighted the headway options for its conservation and propagation.

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Cytogenetic Profile of Rajapalayam Dog Breed of Southern India

Cited by 2 publications

References 5 publications

Identification of urinary sex pheromones in female Rajapalayam breed dog and their influence on stud male reproductive behaviour

Identification of urinary sex pheromones in female Rajapalayam breed dog and their influence on stud male reproductive behaviour

Phenotypic characterization and documentation of Gaddi dog of western Himalayan region of India

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