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- Title
QTL mapping for pumpkin fruit traits using a GBS-based high-density genetic map.
- Authors
Han, Xiaoxia; Min, Ziyang; Wei, Minghua; Li, Yongqi; Wang, Duanhua; Zhang, Zhuqing; Hu, Xinjun; Kong, Qiusheng
- Abstract
Pumpkin is a popular vegetable crop and exhibits a broad diversity in fruit shape and size. Fruit-related traits are the decisive factors determining consumer acceptance and market value of pumpkin cultivar. As a result, deciphering the genetic basis of fruit-related traits is of great importance for pumpkin breeding. To address this problem, a F2 population was generated by two Cucurbita moschata inbred lines with contrasting fruit shapes, and genotyping by sequencing approach was used to construct a genetic map and localize the QTLs underlying the fruit-related traits in this study. The results showed that a high-quality genetic map was constructed for pumpkin, which comprised of 2413 bins and spanned a total length of 2252.10 cM with an average genetic distance of 0.94 cM. Thirty significant QTLs with moderate or small effects were identified for seven fruit-related traits, including fruit length, fruit diameter, fruit shape index, fruit weight, fruit flesh thickness, seed cavity size, and total soluble solids content. Co-locations were observed between the QTLs underlying different traits, demonstrating that pleiotropic effect plays an important role in genetic control of fruit-related traits. The identified QTLs provide valuable information for further fine mapping of the related genes and pumpkin breeding programs with the aim of improving fruit quality.
- Subjects
PUMPKINS; GENE mapping; FRUIT; PLANT gene mapping; BUTTERNUT squash; GENETIC distance; SEED size
- Publication
Euphytica, 2022, Vol 218, Issue 8, p1
- ISSN
0014-2336
- Publication type
Article
- DOI
10.1007/s10681-022-03057-1