Natural crossing and isolation distance between cotton genotypes in turkey

Abstract

The purposes of this study were to determine the percentage of out-crossing, isolation distance and pollinator insect species for cotton (Gossypium hirsutum L.) seed production in the Aydin region in Turkey. The glandless and red-leaf traits in G. hirsutum were used as genetic markers. Two experiments were conducted over two years that monitored out-crossing in adjacent rows and adjacent plants and established that the percentage of out-crossing varied. The percentage of out-crossing varied between 0% and 13.3% depending on the genetic marker. In the experiment to determine isolation distance, natural crossing percentage was not observed in 2002, while this percentage was 0.8% in the first rows in 2003. In this study, cotton fields were also visited once a week during flowering periods for seven weeks in order to determine the numbers of pollinator insect species, where the only detected species was the honey bee. The numbers of pollinator insects were 2.14% (2002)

Impact of aqueous extracts of Cassia occidentalis, Eucalyptus camaldulensis and Hyptis suaveolens on the entomofauna and the seed yield of Gossypium hirsutum at Boklé (Garoua, Cameroon)

“…Insects are important pollinators for G. hirsutum . However, the specific type of insect varies across the globe ( Bozbek et al., 2008 ; Parys et al., 2020 ). From that investigation, Amegilla sp.…”

Genetic Diversity of Natural Crossing in Six Cotton Cultivars

“…Over the years, several techniques were used to determine outcrossing including “red seedling” cotton crossing with “green seedling” cotton (Afzal and Khan, 1950a; Bozbek et al, 2008), glanded and non‐glanded cotton (Elfawal et al, 1976; Bozbek et al, 2008), and the use of transgene movement from transgenic cotton into non‐transgenic cotton (Umbeck et al, 1991; Zhang et al, 2005; Llewellyn et al, 2007; Heuberger et al, 2010). Although the use of pigmented cotton to determine the extent of natural outcrossing throughout the US Cotton Belt has the advantage of simplicity and has proved valuable in identifying gross differences, Stephens and Finkner (1953) pointed out that there were potential shortcomings in the methods that needed further evaluation.…”