Selection efficiency in single and triple crosses segregating generations for improving boll weight and lint percentage in egyption cotton [electronic resource].

Includes references.

The present investigation aimed to evaluate selection efficiency in segregating generations of single crosses and triple crosses between two Egyptian cotton varieties G85 ,G 91 and Australian one in improving boll weight and lint percentage of Egyptian cotton . This work was carried out during 20 11 - 2013 at Sakha Experimental station , Agriculture Research center , Kafr EL-Sheikh , Egypt . The six population chosen in F2 generation were planted in 2011 season ( three single crosses and three triple ones ) whenever two selection intensity i.e. 5% and 10% were conducted and the two derived generation F3 and F4 were grown in 2012 and 2013 seasons, respectively. Results indicated that, for improving boll weight the use of the single cross (G85 x Aust.) or the triple crosses which used Giza 85 as a female parent at selection intensity 5 % was the best way . Also , for improving lint percentage the use of the single cross (G91 x Aust.) or the triple crosses which used Giza 91 as a female parent at selection intensity 5 % was the best way .

Summary in Arabic.

1