GENE ACTION AND COMBINING ABILITY FOR NEPS AND SEED COAT NEPS IN COTTON (Gossypium hirsutum L.)

Abstract

Information about heritability and combining ability for neps and seed coat neps is necessary for the cotton breeding strategies. Seven cotton cultivars including 4 lines and 3 testers were mated in line x tester mating design. The 19 genotypes were grown in RCBD with three replications in Aydın-Turkey conditions during 2014 growing season. Non-additive gene action was important in the expression of seed coat nep size, nep count and nep size. The parental lines Carmen and Claudia were good combiners for most neppiness characteristics. Carmen x Flash, Julia x ST-468, Claudia x Carisma and Gloria x Flash were the superior crosses for selection in further generations of neppiness breeding. It was recommended that the selection of individual plants for neppiness should be performed in later generations (F4-F6).

Pamukta (Gossypium hirsutum L.) Nep ve Lif Kalite Özellikleri Üzerine Modifiye Tekrarlamalı Seleksiyonun Etkisi

“…Abou El -Yazied et al (2014) revealed that ginning out-turn of the second cycle of selection was higher than the base population (13.3% and 17.73%) as a result of two recurrent selection cycles. Zeng and Meredith (2010) and Unay et al (2019) reported genotypic differences for fiber neps and seed coat fragments in cotton. In addition, the correlation among yield and yield components and nep characters were evaluated by Zeng and Meredith (2009), Zeng and Bechere (2012) and Zeng et al (2020).…”