Inversion polymorphism in Southeast Asian populations of the Drosophila nasuta subgroup

Clyde, M. M.

doi:10.1007/bf00128011

Cited by 5 publications

(25 citation statements)

References 9 publications

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“…We calculated the correlation between inversion frequencies (after angular transformation) and altitude: it is significant and positive for inversion A (r = 0945; 3 df; P < 002) and P>oos. (Clyde, 1982;Kumar and Gupta, 1988;Mather and Thongmeearkom, 1980). Unfortunately, however, most authors have published only the heterozygosity for each inversion and not the frequencies of the various heterozygotes-which are the critical data for analysis.…”

Section: Discussionmentioning

confidence: 99%

Allele frequency estimates when only heterozygotes can be recognized: method of estimation and application in the case of chromosomal inversion polymorphisms in Drosophila

1990

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A general method to estimate allele frequencies when there are more than two alleles segregating in an autosomal and only the heterozygotes can be identified is presented. The particular three allele case is detailed and the method is applied to chromosomal inversion data of Drosophila mediopunctata. The estimates from egg sample data are compared with those from adult male sample data. No significant differences were found between the two methods. However, the combined use of both data unveiled significant variations in the frequencies of inversions at different collecting times, that otherwise would not have been detected. Furthermore, the method is applied to data on inversion frequencies of D. nebulosa, D. willistoni and D. flavopilosa.

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Section: Discussionmentioning

confidence: 99%

Allele frequency estimates when only heterozygotes can be recognized: method of estimation and application in the case of chromosomal inversion polymorphisms in Drosophila

1990

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“…Similarly, inversions reported by Lambert (1976) display the same labelling system but have not been named with reference to the same chromosomal maps. Clyde (1982) reports one simple inversion on chromosome I which appears to correspond with inversion X-C of Wilson et al (1969). Mather and Tam (1985b) describe two simple inversions of chromosome I in D. s. albostrigata collected from Chiang Mai.…”

Section: Sulfurigaster Albostrigatamentioning

confidence: 99%

“…Mather and Tam (1985b) describe two simple inversions of chromosome I in D. s. albostrigata collected from Chiang Mai. The break points of inversion G (Mather & Thongmeearkom, 1972) recorded by Mather and Tam (1985b) from Chiang Mai correspond to those of inversion X-1 described by Clyde (1982) from Cebu and Hidden Valley Springs. One other simple inversion, A3, has been observed on chromosome I of D. s. albostrigata.…”

Section: Sulfurigaster Albostrigatamentioning

confidence: 99%

“…The inversion IILA (Wilson et al, 1969), was observed from all localities and is the only IIL inversion shared with other species. Inversion IILA appears to correspond with IIL-1 described by Clyde (1982) from Cebu, Kuala Lumpur, Hidden Valley Springs and Chiang Mai. It also appears to correspond with 2LB in D. nasuta described by Ranganath and Krishnamurthy (1975) from South Indian populations, with 2LA in/9.…”

Section: Sulfurigaster Albostrigatamentioning

confidence: 99%

“…The study of heterozygous inversions by Wilson et al (1969), Balwin (1982) and Clyde (1982) has emphasized the high degree of chromosomal polymorphism which exists in some members of the Drosophila nasuta subgroup. Over a four year period from 1981 to 1985, six monthly collections of D. albomicans, D. s. albostrigata and D. kohkoa were made from three collection stations in Thailand.…”

Section: Introductionmentioning

confidence: 99%

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Inversion polymorphism in species of the Drosophila nasuta subgroup from Thailand

Pope

1987

Genetica

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Thailand populations of three species of the D. nasuta complex have been analysed for the presence of paracentric inversions. D. albomicans and D. sulfurigaster albostrigata were collected from Phuket, Chiang Mai and the River Kwai, whilst D. kohkoa was found only in Phuket and the River Kwai. Chromosomal polymorphism was studied in respect to geographical distribution. The Phuket populations of all three species proved to be highly polymorphic by comparison with the River Kwai and Chiang Mai populations. The heterozygosity frequencies of inversions were calculated and the variations interpreted as a result of adaptation to local ecogeographical conditions. Shared polymorphisms revealed that D. kohkoa and D. s. albostrigata are more closely related to D. albomicans than they are to each other.

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Inversion polymorphism in populations of Drosophila sulphurigaster albostrigata and Drosophila nasuta albomicans from Phuket, Thailand

1990

Genetica

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Two species of the Drosophila nasuta subgroup of the Drosophila immigrans group, D. sulphurigaster albostrigata and D. nasuta albomicans were investigated in this study. Collections of both species were made from Phuket, Thailand. Both species have similar salivary chromosomes, with four autosomal arms and one sex chromosome arm, and both are highly polymorphic for paracentric inversions. D.s. albostrigata accounted for the majority of the isolines collected and exhibited the greater number of inversions. One inversion, C14 was common to both species, indicating common ancestry. A non-random distribution of inversions was observed on the proximal end of chromosome III in both D.s. albostrigata and D. n. albomicans. An inter-collection comparison revealed that both rigid and flexible chromosomal polymorphism were operating in the two species, with a seasonal variation noted for one inversion in D. s. albostrigata. A non-random association of two inversions was observed in D. n. albomicans. Based on a comparison of the indices of crossing over, both D. s. albostrigata and D. n. albomicans were found to be more heterozygous than in previous studies, with D. n. albomicans appearing to have evolved further than D. s. albostrigata.

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Inversion polymorphism in Southeast Asian populations of the Drosophila nasuta subgroup

Cited by 5 publications

References 9 publications

Allele frequency estimates when only heterozygotes can be recognized: method of estimation and application in the case of chromosomal inversion polymorphisms in Drosophila

Allele frequency estimates when only heterozygotes can be recognized: method of estimation and application in the case of chromosomal inversion polymorphisms in Drosophila

Inversion polymorphism in species of the Drosophila nasuta subgroup from Thailand

Inversion polymorphism in populations of Drosophila sulphurigaster albostrigata and Drosophila nasuta albomicans from Phuket, Thailand

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