Assessment of Genetic Relationship among Rhynchostylis Species based on Inter-Simple Sequence Repeat (ISSR) Markers

• 영문명: Assessment of Genetic Relationship among Rhynchostylis Species based on Inter-Simple Sequence Repeat (ISSR) Markers
• 발행기관: 한국육종학회
• 저자명: Juthaporn Seangprajak Jirapa Phetsom Aphidech Saengdee Porntip Atichart Sununta Chuncher Piyada Theerakulpisut Arnusorn Saengprajak Sudarat Thanonkaew
• 간행물 정보: 『Plant breeding and biotechnology』Vol.12, 69~81쪽, 전체 13쪽
• 주제분류: 농수해양 > 기타농수해양
• 파일형태: PDF
• 발행일자: 2024.03.30

국문 초록

The genus Rhynchostylis contains important commercial orchids in Thailand with high diversity, but limited information is available regarding the genetic diversity of these orchids. Rhynchostylis has a short blooming period, which makes more difficult to distinguish between variations based only on their appearances. This study evaluated the genetic variation among six accessions of Rhynchostylis, along with one Vanda and one Aerides accession collected from different locations in the northeast of Thailand using 16 polymorphic inter-simple sequence repeat (ISSR) markers. The ISSR markers comprised 83 alleles with sizes ranging from 208 to 1,223 bp. The average number of alleles per locus was 5.19, with a standard deviation of 3.49. The average percentage of polymorphic bands was 95.21%. Polymorphism information content (PIC) values ranged between 0.05 and 0.44, with a mean average of 0.21. The calculated genetic similarity coefficients ranged from 0.383 to 0.914, suggesting a high level of genetic diversity among all the samples. UPGMA dendrograms were created using genetic similarity coefficients and divided into three main clusters. Cluster I contained four closely related R. gigantea orchids. Cluster II comprised two accessions, R. gigantea var. vivaphandhul and V. coelestis, while Cluster III contained two accessions of R. retusa and A. houlettiana. Based on ISSR data, the genetic similarities among the 8 orchid accessions do not correlate with flower color phenotypes and sampling locations, except for Cluster I. The results suggest that ISSR markers can effectively assess the genetic information of both wild and cultivated orchid resources. This study provides useful information for further development of novel markers specific to orchid varieties and for assisting the success of orchid breeding programs through the selection of parent plants.

목차

Introduction

Materials and Methods

Results

Discussion

Acknowledgments

References

키워드

DNA fingerprinting Endemic orchid Epiphytic orchid Genetic variation ISSR Rhynchostylis