Development of ‘naked-tufted’ seed coat mutants for potential use in cotton production
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Use of chemical mutagenesis has been highly successful in most major crops. The objective of this research was to develop ‘naked-tufted’ seed mutants and to incorporate this genetic trait into cotton to enhance crop quality and reduce processing costs. In 1997, six commercial cultivars were treated with 2.45% v/v ethyl methane sulfonate. In 1999, three M3 plants were identified that had partially naked seed coats. The trait was stabilized through individual plant selections from 2000 to 2004. During 2005 and 2006, the homozygous naked-tufted M8 mutant lines were evaluated for lint yield, lint percent, fibers/seed, fibers/mm2, fiber quality, seed oil content, ginning efficiency and yarn spinning performance. Overall, the naked-tufted seed mutants had lower lint yield, lower fibers/seed, lower lint/seed, and lower fibers/mm2 when compared with their original fuzzy parents. The lint turnout from the mutants was similar to the fuzzy parents and the commercial cultivars. The naked-tufted seed mutants had higher seed oil percent, 6–17% lower short fiber contents, significantly reduced seed coat neps (37–42%), higher elongation and yarn tenacity than their fuzzy counterparts. Preliminary data also showed that the naked-tufted mutants required less energy to gin.
KeywordsEthyl methane sulfonate Fiber quality Mutagenesis Naked seeds
We would like to thank Cotton Incorporated and the International Cotton Research Center at Texas Tech University for their financial support in carrying out this research. This research was carried out at Texas Tech University where the senior author was working as a cotton breeder.
- Auld DL, Bechere E, Ethridge MD, Becker WD, Hequet E, Cantrell RG (2000) Registration of TTU-1107B and TTU 271–2155C mutant germplasm lines of upland cotton with improved fiber quality. Crop Sci 40:1835–1836Google Scholar
- Endrizzi JE, Ray DT (1991) Monosomic and monotelodisomic analysis of 34 mutant loci in cotton. J Hered 82:53–57Google Scholar
- Endrizzi JE, Turcotte EC, Kohel RJ (1984) Qualitative genetics, cytology and cytogenetics. In: Kohel RJ, Lewis DF (eds) Agronomy: Cotton. American Society of Agronomy Inc., Madison WI, pp 59–80Google Scholar
- Gaibullaev IKH, Avazkhodzhaev MKH, Egamberdiev AE (1976) Reaction of chemomutants of cotton to infection by the pathogen of Verticillium Wilt. Sov Genet 11(1):34–36Google Scholar
- Harland SC (1929) The Work of the Genetic Department of the Cotton Research Station, Trinidad. Emp Cotton Grow Rev 6:304–314Google Scholar
- Hussien HAS, Al-enani FA, El-Moghazi M (1982) Histological and morphological characteristics of a glandless cotton mutant induced with sodium azide. Egypt J Genet 11:167–173Google Scholar
- Kohel RJ (1973) Genetic nomenclature in cotton. J Hered 64:291–295Google Scholar
- Larik AS, Hafiz HMI, Al-Saheal YA (1983) Azide mutagenesis in cotton (Gossypium hirsutum). Sci Environ 5:33–42Google Scholar
- Samora PJ, Stelly DM, Kohel RJ (1994) Localization and mapping of the Le1 and G12 of cotton (Gossypium hirsutum L.). J Hered 85:152–157Google Scholar
- Thadani KI (1923) Linkage relations in the cotton plant. Agric J Ind 18:572–579Google Scholar