MAINTENANCE AND PRODUCING OF THE NUCLEOLUS (BREEDER’S SEED) OF GIZA 45 EGYPTIAN COTTON CULTIVAR

doi:10.12816/ejpb.2019.256678

MAINTENANCE AND PRODUCING OF THE NUCLEOLUS (BREEDER’S SEED) OF GIZA 45 EGYPTIAN COTTON CULTIVAR

Document Type : Original research

10.12816/ejpb.2019.256678

Abstract

The breeding program of the cultivar Giza 45 was conducted at Sakha Agricultural Research Station, Kafr El-Sheikh district during 2015 -2018 growing seasons to initiate a nucleolus. In 2014 season forty five type plants were selected from the breeding field of Giza 45 cultivar and provided fifty four progenies (increase A) in 2015. From increase A, seventeen families were selected to establish increase B in 2017. According to the statistical analysis of yield trial which included the eighteen families and comparisons of the latest two lines in cultivation of Giza 45, four elite families were selected and the seeds were carefully massed together to form the nucleolus (breeder's seed) in 2019 season. The results obtained indicated that, the pure line method in the sense of pedigree selection for renewing annually Giza 45 breeder's seed could produce high genetically pure seeds and meantime, prevent genetic deterioration. Meanwhile, the selection technique for producing breeder's seed of the cv. was valid and proved to be effective in holding this cv. according to the standard type of Giza 45.

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