Cultivar specific gene pool may play an important role in Musa acuminata Colla evolution

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TitleCultivar specific gene pool may play an important role in Musa acuminata Colla evolution
Publication TypeJournal Article
Year of Publication2021
AuthorsJeensae R, Kongsiri N, Fluch S, Burg K, Boonruangrod R
JournalGenetic Resources and Crop Evolution
ISSN1573-5109
Abstract

Edible bananas are hybrids of various inter- and intraspecific combinations of Musa acuminata Colla and M. balbisiana Colla at different ploidy levels brought up by coexisting selection by farmers and nature. Our current study, based on a 461-bp-long sequence of the 5′ETS rDNA of 35 diploids and 19 cultivated varieties harboring 87 informative SNPs, revealed five groups of M. acuminata subspecies; A1: zebrina, A2: malaccensis, A3: burmannica/burmanicoides/siamea, A4: banksii/errans/microcarpa, A5: truncata, and a single cluster of B: M. balbisiana. We identified a new 5′ETS rDNA allele unidentified gene pool (UGP) absent in wild type accessions but present in diploid and triploid cultivars. This new allele is probably the result of recombination event in ancient ‘cultiwild’ populations. In the present study we observed a putative crossover event re-establishing a conventional allele. Genotyping triploid cultivars revealed that the Hom group cultivars are composed of two different ancestors while Cavendish Grande Naine, Cavendish Petit Naine, Cavendish Poyo and Gros Michel have three different ancestors. Hom Thong and Hom Taiwan were shown to have different ancestors compared to Gros Michel, unexpectedly even including subspecies truncata rDNA. We further improved our earlier established 5′ETS rDNA SCAR marker system by adding two new markers identifying M. acuminata subsp. truncata (Ridl.) Kiew and the newly identified UGP allele. We suggest that for breeding purposes, involvement of partially fertile diploid cultivar/cultiwild carrying the UGP gene pool may be an approach for developing new breeding programs and improving genetic studies of edible banana.

URLhttps://doi.org/10.1007/s10722-020-01088-y
DOI10.1007/s10722-020-01088-y
Showing 33 of 33 accessions
Accession Name Pictures Accession number Species / Group SubSpecies / SubGroup Origin Collection Available for distribution
Agutay ITC1028 acuminata Unknown Unknown ITC
Calcutta 4 ITC0249 acuminata subsp. burmannicoides Unknown ITC
Pahang ITC0609 acuminata subsp. malaccensis Unknown ITC
Zebrina ITC1177 acuminata subsp. zebrina Unknown ITC
Maia Oa ITC0728 acuminata subsp. zebrina Unknown ITC
Higa ITC0464 acuminata subsp. banksii Unknown ITC
Pisang Serun 404 ITC1348 acuminata subsp. malaccensis Unknown ITC
Pisang Serun 400 ITC1349 acuminata subsp. malaccensis Malaysia ITC
Khae (Phrae) ITC0660 acuminata subsp. siamea Thailand ITC
Malaccensis ITC0250 acuminata subsp. malaccensis Unknown ITC
Banksii ITC0623 acuminata subsp. banksii Papua New Guinea ITC
Paliama ITC0766 acuminata subsp. banksii Unknown ITC
Petite Naine ITC0654 AAA subgr. Cavendish Unknown ITC
Bebek ITC0471 AA Unknown Indonesia ITC
Malaccensis ITC0399 acuminata subsp. malaccensis Unknown ITC
Espermo ITC0042 ABB subgr. Bluggoe Unknown ITC
Pisang Mas ITC0653 AA subgr. Sucrier Unknown ITC
Monjet ITC0462 AA Unknown Papua New Guinea ITC
Tani ITC1120 balbisiana Unknown Unknown ITC
Cameroun ITC0246 balbisiana Unknown Unknown ITC
Grande Naine ITC0180 AAA subgr. Cavendish Unknown ITC
Borneo ITC0253 acuminata subsp. microcarpa Unknown ITC
Bie Yeng ITC0279 AA Unknown Unknown ITC
Long Tavoy ITC0283 acuminata subsp. burmannica Unknown ITC
Truncata ITC0393 acuminata subsp. truncata Unknown ITC
Honduras ITC0247 balbisiana Unknown Unknown ITC
SN 2
ITC0265 AA Unknown Papua New Guinea ITC
Niyarma Yik
ITC0269 AA Unknown Unknown ITC
Butuhan, salient apex
ITC0564 balbisiana Unknown Philippines ITC
Poyo
ITC0345 AAA subgr. Cavendish Unknown ITC
Gros Michel
ITC1481 AAA subgr. Gros Michel Unknown ITC
CIRAD 930
ITC1511 acuminata subsp. malaccensis Guadeloupe ITC
Madang
ITC0254 acuminata subsp. malaccensis Unknown ITC
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