Plan for Breeding, Maintenance and Producing the Nucleolus (Breeder's Seed) of Giza 45 Egyptian Cotton Variety During 2011 – 2014 Growing Seasons

Abstract

The breeding program of Giza 45 was conducted at Sakha Agricultural Research Station, Kafr El-Sheikh district during 2011 to 2014 growing seasons. In 2011 season 42 type plants were selected from the breeding field of Giza 45 variety and furnished 42 progenies (increase A) in 2012. From the latter, fourteen families were selected to descend (increase B) in 2013. According to the statistical analysis of yield trial which include the fourteen families and comparisons of the latest lines of Giza 45, four elite families were selected and the seeds were carefully massed together to form the nucleolus (breeder's seed) in 2014 season. The results obtained here indicated that, the pure line method in the sense of pedigree selection for renewing annually Giza 45 breeder's seed could produce high genetic pure seeds and in the same time, prevent genetic contamination. Meanwhile, the selection technique for producing breeder's seed of Giza 45 variety was valid and proved to be effective in holding this variety according to the standard type of Giza 45. Genetic purity, Maintenance ,cotton nucleolus .

Application of the Cotton Varieties Maintaining Program in Egypt to Produce the Nucleolus (Breeder’s Seed) of Super Giza 94 Cultivar, During 2019-2023 Seasons

“…All Egyptian cotton varieties are maintained by pedigree selection and independent culling levels in Cotton Research Institute. There are many studies, such as: El-Akkad et al, (1982), Younis et al, (1993), Abo-Arab et al, (1995), Lasheen (1997), El-Disouqui (2001), Nagib and Hemida (2001), Abd Al-Zaher (2004), Mohamed (2013), Al-Ameer (2014), Abd El-Salam (2015), Al-Hibbiny (2015), El-Dahan (2016), Heba (2016), Mahrous (2017), Soliman (2018), Badeaa (2019), Mabrouk (2019) and Al-Hibbiny (2020) stated that the pure seed and production of cotton cultivar using pedigree selection method is essential to produce renew and maintain the breeder's seed of the cotton cultivars in the commercial use. This method based on massing selfed seeds of homogeneous type families, according to their performance in evaluation with the latest nuclei.…”