<span style="font-size: 21.0pt;mso-bidi-font-size:14.0pt;font-family:"Times New Roman","serif"">Patterns of inversion polymorphism in three species of the <i><span style="font-size:21.5pt;mso-bidi-font-size:14.5pt;font-family:"Times New Roman","serif"">Drosophila melanogaster </span></i><span style="font-size:21.0pt;mso-bidi-font-size:14.0pt; font-family:"Times New Roman","serif"">species group </span></span>

Abstract

<span style="font-size:16.0pt;mso-bidi-font-size:9.0pt; line-height:115%;font-family:" times="" new="" roman","serif";mso-fareast-font-family:="" "times="" roman";mso-ansi-language:en-us;mso-fareast-language:en-us;="" mso-bidi-language:ar-sa"="">In <i><span style="font-size:15.5pt;mso-bidi-font-size: 8.5pt;line-height:115%;font-family:" times="" new="" roman","serif";mso-fareast-font-family:="" "times="" roman";mso-ansi-language:en-us;mso-fareast-language:en-us;="" mso-bidi-language:ar-sa"="">Drosophila, </span></i><span style="font-size:16.0pt; mso-bidi-font-size:9.0pt;line-height:115%;font-family:" times="" new="" roman","serif";="" mso-fareast-font-family:"times="" roman";mso-ansi-language:en-us;mso-fareast-language:="" en-us;mso-bidi-language:ar-sa"="">chromosomal polymorphism due to paracentric inversions is very common and constitutes an adaptive character. The degree of chromosomal variability varies in different species and also in different populations of the same species.Chromosomal polymorphism in Indian natural populations of three species, <i><span style="font-size:15.5pt; mso-bidi-font-size:8.5pt;line-height:115%;font-family:" times="" new="" roman","serif";="" mso-fareast-font-family:"times="" roman";mso-ansi-language:en-us;mso-fareast-language:="" en-us;mso-bidi-language:ar-sa"="">D. melanogaster, D. ananassae </span></i><span style="font-size:16.0pt;mso-bidi-font-size:9.0pt;line-height:115%;font-family: " times="" new="" roman","serif";mso-fareast-font-family:"times="" roman";mso-ansi-language:="" en-us;mso-fareast-language:en-us;mso-bidi-language:ar-sa"="">and <i><span style="font-size:15.5pt;mso-bidi-font-size:8.5pt;line-height:115%;font-family: " times="" new="" roman","serif";mso-fareast-font-family:"times="" roman";mso-ansi-language:="" en-us;mso-fareast-language:en-us;mso-bidi-language:ar-sa"="">D. bipectinata </span></i><span style="font-size:16.0pt;mso-bidi-font-size:9.0pt;line-height:115%;font-family: " times="" new="" roman","serif";mso-fareast-font-family:"times="" roman";mso-ansi-language:="" en-us;mso-fareast-language:en-us;mso-bidi-language:ar-sa"="">which belong to the <i><span style="font-size:15.5pt;mso-bidi-font-size:8.5pt;line-height:115%;font-family: " times="" new="" roman","serif";mso-fareast-font-family:"times="" roman";mso-ansi-language:="" en-us;mso-fareast-language:en-us;mso-bidi-language:ar-sa"="">melanogaster </span></i><span style="font-size:16.0pt;mso-bidi-font-size:9.0pt;line-height:115%;font-family: " times="" new="" roman","serif";mso-fareast-font-family:"times="" roman";mso-ansi-language:="" en-us;mso-fareast-language:en-us;mso-bidi-language:ar-sa"="">species group has been studied and the quantitative data on frequency of inversions have been reported. Behaviour of chromosome inversions has also been studied in laboratory conditions. The present review summarises the work done on in version polymorphism in Indian populations of three species which clearly demonstrates that these three species vary in their patterns of inversion polymorphism and have evolved different mechanisms for adjustment to their environments although they belong to the same species group.</span></span></span></span></span>