Male sterility in cotton and possibilities for its utilization

Stoilova, Ana and Rusev, Vladimir and Spasova, Dragica (2006) Male sterility in cotton and possibilities for its utilization. Годишен зборник 2006, Yearbook, VI. pp. 7-16. ISSN 1409-987X

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Five male sterile lines were crossed to G.hirsutum male parents under the nature field conditions to produce hybrid plants. At the flowering time in different days and hours observations were made on pollen sterility. The trials were carried in 2005 and 2006 Results obtained showed that the available sterile lines were not completely sterile, there was no pollen in the early hours (from 9a.m to 2p.m) or in case of presence it was highly sterile. The absence of pollen in the early hours if day during the flowering will permit to solve the problem with the hand emasculation by its reduction in the hybrid cotton seed production. At these lines some viable pollen was developed in the later hours or at the end of flowering and normal seeds were produced by self - pollination, and it is not necessary to restore fertility or maintain sterility by the use of maintainer lines. The hybrid plants based on male sterility produced under the free cross pollination were insufficient for commercial seed production. The highest percent was found to be 67,8 at the line A-21 in 2006. As the very early No. 433 (brown cotton) was used as a pollinator high percent of hybrid plants was also realized.

Item Type: Article
Uncontrolled Keywords: G. hirsutum, pollen sterility, hybrid plants, out - crossing
Subjects: Agricultural Sciences > Other agricultural sciences
Divisions: Faculty of Agriculture
Depositing User: Dragica Spasova
Date Deposited: 24 Nov 2012 08:53
Last Modified: 19 Jun 2013 12:21

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