IMPROVEMENT AND REPRODUCTION TWO CULTIVARS OF LONG AND MEDIUM STAPLE COTTON BY USING INDIVIDUAL SELECTION

Abstract

A Field experiment was carried out at the experimental farm of El-kod Agricultural Research Station, Abyan Governorate during 2012/2013, 2013/2014 and 2014/2015 seasons. The study has aimed to improve characters of growth, yield and its components of long-staple cotton cultivar (Muallem 2000) and middle-staple cotton cultivar (Acala S.J-2) by using individual selection.
The results indicate to the standard deviation is decreased for plant height during 2014/2015 season to 17.7% and 7.3%, the height of the first sympodia to 4.62% and 8.7%, the number of monopodia / plant to 1.49% and 25.8%, the number of sympodia / plant to 1.95% and 14.4% branch/plant as well as the results indicate to the coefficient of variation is decreased for number of open boll/plant to 8.8% and 17.2%, seed cotton yield/plant to 17.51% and 20.1% for both cultivars respectively.
Pure of Percentage increase of 99% for cultivars (Muallem 2000) and (Acala S.J-2) on season 2014/2015 by take out plant different on variety (Muallem 2000) and (Acala S.J-2) depends on flowers petals, boll shape, number of locule containing seeds, lint colour and seeds colour.
The results refer to percentage genetic advance for number of open boll/plant on 2014/2015 to 40% and 45%, Broad Sense Heritability to 22% and 18%, in addition to that the genetic advance percentage seed cotton yield/plant to 55% and 33%, Broad Sense Heritability to 30% and 21% for both cultivars respectively.