Genomic characterization of a rare Carica papaya X chromosome mutant reveals a candidate monodehydroascorbate reductase 4 gene involved in all-hermaphrodite phenomenon

Chen, Jen-Ren; Ueno, Hiroki; Matsumura, Hideo; Urasaki, Naoya; Lee, Chen‐Yu; Chen, Fure-Chyi; Chin, Shih-Wen; Liu, Chun-Chi; Chiu, Chan-Tai; Tarora, Kazuhiko; Li, Jingyi; Lee, Chieh Ying; Ku, Hsin-Mei

doi:10.1007/s00438-021-01822-w

Cited by 2 publications

(1 citation statement)

References 31 publications

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“…More recently, a candidate gene, monodehydroascorbate reductase 4 (MDAR4), was identified from H-TSS No.7 line with X-chromosome mutant (3 bp deletion) resulting in all hermaphrodite progeny. MDAR4 is involved in a hydrogen peroxide scavenging pathway [25]. The marker developed from this gene has potential applications in papaya breeding, selection of potential lines for in vitro clonal propagation, and the production of high-quality commercial varieties of papaya seedlings.…”

Section: Sex Determinationmentioning

confidence: 99%

Papaya: The Versatile Tropical Fruit

Burns¹,

Saengmanee²,

Doung-ngern³

2023

Tropical Plant Species and Technological Interventions for Improvement

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Papaya (Carica papaya L) is a versatile tropical fruit with its usage ranging from consumption, cosmetics, to pharmaceuticals. In 2020, it was the third most-produced tropical fruit crop in the world. Papaya is a trioecious herbaceous plant with distinct flower and fruit morphological appearances. The fruits from hermaphrodite papaya are favorable for both consumption and processing due to their superior quality. Papaya has a genome size of 372 Mb and chromosome of 2n =18. The male and hermaphrodite papaya have XY and XYh sex chromosomes, respectively, while the female has XX. Using omics and bioinformatics approaches, papaya cultivars with desired fruit quality can be selected and identified from germplasm for incorporation in breeding programs. Papaya production can be done either in open fields or under protected cultivation. Open field cultivation provides for large-scale production, but with the disadvantages of variability in fruit yield, quality, and limitations on growing and harvesting seasons. Under protected cultivation, papaya can be cultivated in all seasons, whilst delivering higher yields. Conversely, multidisciplinary approaches with selected papaya cultivars, good farm management, and suitable conditions provide high yields of quality fruit for both consumption and processing, whilst minimizing the adverse effects related to environmental conditions.

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Section: Sex Determinationmentioning

confidence: 99%