Abstract
Generation mean analysis was carried out to estimate the nature and magnitude of gene effects for fibre quality traits in three crosses of upland cotton (Gossypium hirsutum L). The presence of epistasis was reflected by scaling tests and inadequacy of simple additive-dominance model for most of the characters studied. The results obtained revealed that the nature and magnitude of gene effects differed in different crosses and showed importance of additive as well as non-additive gene effects in the inheritance of different characters. In view of the parallel role of additive and non-additive gene effects in the inheritance of different characters, selection in the segregating generations should be delayed when dominance gene effects would have diminished or sophisticated selection procedures as recurrent selection and population improvement programmes may be followed. However, additive gene effects may be fixed with respect to some specific traits such as micronair value and fibre strength.
Highlights
Cotton, which has been reputed as “Queen of the fibre plants” is an important fibre crop in India Cotton is an important fibre crop being used in the textile industry
Over 90% of cotton grown in the world is Gossypium hirsutum L. or upland cotton
Additive, dominance and epistatic gene effects were estimated by Generation Mean analysis for fibre quality traits in three crosses of upland cotton (Gossypium hirsutum L)
Summary
Cotton, which has been reputed as “Queen of the fibre plants” is an important fibre crop in India Cotton is an important fibre crop being used in the textile industry. Over 90% of cotton grown in the world is Gossypium hirsutum L. or upland cotton. It plays a key role in the national economy by way of its contribution in trade, industry, employment and foreign exchange earnings. Genetic analysis of quantitative traits further helps to elucidate the nature and magnitude of genetic variation present in the population. Various studies have been conducted to study the nature and magnitude of gene effects in the inheritance of different quantitative characters and involvement of both additive and non-additive gene effects have been reported by many workers [1,2]. Additive, dominance and epistatic gene effects were estimated by Generation Mean analysis for fibre quality traits in three crosses of upland cotton (Gossypium hirsutum L)
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