Molecular analysis of genetic diversity in melon landraces (<Emphasis Type="Italic">Cucumis</Emphasis><Emphasis Type="Italic">melo</Emphasis> L.) from Myanmar and their relationship with melon germplasm from East and South Asia |
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Authors: | San San Yi Yukari Akashi Katsunori Tanaka Tin Tin Cho May Thin Khaing Hiromichi Yoshino Hidetaka Nishida Tatsuya Yamamoto Kyaw Win Kenji Kato |
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Institution: | (1) Vegetable and Fruit Research and Development Center (VFRDC), Yemon, Indaingpo, Hlecuts, Yangon, Myanmar;(2) Faculty of Agriculture, Okayama University, 1-1-1 Tsushima-Naka, Okayama 700-8530, Japan;(3) Research Institute for Humanity and Nature, 457-4 Motoyama, Kamigamo, Kita-ku, Kyoto 603-8047, Japan;(4) Kunming Institute of Botany, CAS, Heilongtan, Kunming, Yunnan, 650204, China |
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Abstract: | Genetic diversity of Myanmar melon was evaluated by analysis of 27 RAPD markers and morphological characters using 41 accessions
of melon landraces of which 36 accessions were small-seed type. The gene diversity was 0.239, higher than for group Conomon
from East Asia and equivalent to Indian melon populations. Melon accessions were classified into six major clusters. The largest
cluster IV comprised mainly group Conomon which was closely related to cluster V consisting of mainly group Agrestis. Most
of the accessions of group Cantalupensis were grouped into clusters II or VII and were distantly related to groups Conomon
and Agrestis. The genetic relationship to melon accessions from neighboring countries was analyzed. The 24 accessions of clusters
IV and V were mostly clustered together with small-seed type melon of India, but the 14 accessions of clusters VI and VII
were mostly clustered together with large-seed type melon of India. These results indicated that the genetic diversity of
Indian melon is conserved in Myanmar. Genetic introgression among melon groups through spontaneous hybridization was also
indicated and was considered important to maintain or increase the genetic diversity in Myanmar. |
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