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. 2024 Sep 16;22(12):3473–3488. doi: 10.1111/pbi.14468

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© 2024 The Author(s). Plant Biotechnology Journal published by Society for Experimental Biology and The Association of Applied Biologists and John Wiley & Sons Ltd.

This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc-nd/4.0/ License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.

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Phenotyping and genetic analysis of petal colour in cotton genus. (a) Investigation of petal colour and geographic distribution in 29 diverse cotton species. The 29 species are categorized into 8 diploid chromosomal groups (A–G plus K) and the allotetraploid AD group. G. aridum (D₄), G. gossypioides (D₆), G. lobatum (D₇), G. laxum (D₉), G. schwendimanii (D₁₁), G. sturtianum (C₁), G. bickii (G₁), G. australe (G₂), G. nelsonii (G₃), and G. rotundifolium (K₂) exhibit a red petal colour. (b) Evolutionary relationships among cotton species with different petal colours. (c) Genetic analysis of the red petal by crossing G. hirsutum (ZYH) with G. hirsutum (ZM24), and G. barbadense (3–79), respectively.