آنالیز بیوانفورماتیک ژنوم کلروپلاست پنبۀ دیپلوئید (Gossypium herbaceum) و مقایسه آن با دو گونۀ آلوتتراپلوئید

نوع مقاله : علمی پژوهشی

نویسندگان

1 کارشناس‌ارشد اصلاح‌نباتات، دانشکده کشاورزی، دانشگاه ارومیه، ارومیه، ایران

2 استادیار، بخش تحقیقات علوم زراعی و باغی، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی آذربایجان غربی، سازمان تحقیقات، آموزش و ترویج کشاورزی، ارومیه، ایران

3 دانشیار گروه اصلاح‌نباتات و بیوتکنولوژی گیاهی، دانشکده کشاورزی دانشگاه ارومیه، ارومیه، ایران

چکیده

هشت ژنوم دیپلوئید شامل ژنوم‌های A، B، C، D، E، F، G و K در جنس گوسیپیوم Gossypium شناسایی شده اند. ژنوم A فقط به دو گونه herbaceum و arboreum پنبه های دنیای قدیم محدود شده است و این ژنوم از G. herbaceumبه گونه‌های دیگر انتقال پیدا کرده است. به منظور توالی یابی ژنوم کلروپلاست G. herbaceum (A1) و مقایسه آن با دو گونه G. hirsutum (AD1) و G. barbadense (AD2) توالی‌های ژنوم سه گونه از سایت مرکز ملی اطلاعات بیوتکنولوژی برداشت شده است. موقعیت هر کدام از ژن‌ها، تعداد نوکلئوتید‌ها، نواحی بین ژنی و اینترون‌ها مشخص گردید. ژنوم کلروپلاست G. herbaceum دارای 160140 جفت‌‌باز بوده و ساختمان چهاربعدی حفاظت شده دارد. نواحی تک نسخه‌ای ژنوم کلروپلاست، توسط دو ناحیه‌ تکرار معکوس از هم جدا شده که ناحیه‌ تک نسخه‎‌ای بزرگ دارای 88709 جفت ‌باز، ناحیه‌ تک نسخه‌ای کوچک 20221 جفت ‌باز بوده و هر ناحیه‌ تکرار معکوس 25605 جفت باز دارد. ژنوم پلاستیدی 114 ژن تک نسخه‌ای و 19 ژن دو نسخه‌ای دارد که ژن‌های تک نسخه‌ای شامل 79 ژن رمزکننده‌ پروتئین، 4 ژن rRNA ریبوزومی و 31 ژن tRNA است. نتایج نشان داد میان ژن‌های پلاستیدی فقط 18 ژن دارای 2-1 اینترون هستند که در مقایسه با ژنوم کلروپلاست دو گونه آلوتتراپلوئیدی ژن ycf15 تنها ژن دو


نسخه‌ای موجود در G. herbaceum بود. در G. herbaceum و G. barbadense ژن rpl22 وجود داشت ولی ژن ycf15 در


G. barbadense، ژن های rpl22 و ycf15 در G. hirsutum از دست رفته اند. با وجود میزان بالای حفاظت SSRها در ژنوم کلروپلاست این SSRها به دلیل بازده بالا در مقابل SSR ژنومی برای آنالیز تنوع ژنتیکی مفید هستند.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Comparative bioinformatics analyses of the chloroplast genome of a diploid Cotton (G. herbaceum) with two allotetraploid species

نویسندگان [English]

  • Hajar Nasrollahi 1
  • Farshid Talat 2
  • Iraj Bernousi 3
  • Mehdi Badri Anarjan 1
1 Former M.Sc. Student of Plant Breeding, Urmia University, Urmia, Iran
2 Assistant Professor, Seed and Plant Improvement Research Department, West Azarbaijan Agricultural and Natural Resources Research and Education Center, AREEO, Urmia, Iran.
3 Associate Professor, Department of Plant Breeding and Plant Biotechnology, Faculty of Agriculture, Urmia University, Urmia, Iran
چکیده [English]

Diploid genome contains 8 genomes designated as A, B, C, D, E, F, G and K which have been identified in the genus Gossypium. The genome of A is limited only in two species as G. herbaceum and G.arboreum, and it is transferred from G. herbaceum to other species. The chloroplast genome (CP) of G. herbaceum has 160,140 bp lengths with protected quadripartite structure. Single copy regions of chloroplast genome are separated by two inverted repeat regions with a large copy region with 88,709 bp also the single copy region and each small inverted repeat regions have 20,221 and 25,605bp. The plastidic' s genome has 113 single copy genes and 19 duplicated copy genes. Single copy genes are encoding of 79 genes for protein production, four ribosomal RNA genes and 31 transfer RNA genes. Result showed that among all plastid genes only 18 genes appeared to have 1-2 intron/s and when compared with chloroplast genome of two allotetraploid species. Ycf15 gene as the only duplicated gene, rpl22 was in G. herbaceum and in the two species has studied G. herbaceum, G. barbadense. But ycf15 gene in G. barbadense and both ycf15 and rpl22 genes were lost in G. barbadense and G. hirsutum. Though the high level of SSR protection in the chloroplast genome. SSRs are useful for genetic variation analysis since they have high efficiency against genomic SSRs.

کلیدواژه‌ها [English]

  • Gossypium herbaceum
  • Chloroplast Genome
  • sequencing

مراجع

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