Abstract
The present research was conducted so as to estimate the combing ability effects of wheat genotypes for some quantitative traits in a set of line x tester crosses developed from five parents of bread wheat (Triticum aestivum L.), of which two were considered as lines (Anmol91 and Kiran-95) and three as testers (Imadad-05, SKD-1 and Khirman). The characters studied were tillers plant -1 , spike length, spikelets spike -1 , grains spike -1 , grain yield plant -1 and seed index. The experiment was carried out in a randomized complete block design with three replications at Southern Wheat Research Station, A.R.I. Tandojam during the rabi season, 2013-14. Results revealed that variances due to F1 hybrids, lines, testers and line x tester were significant for grain yield and almost for all other characters. Thus, showing these attributes were controlled by both additive and non-additive inheritance. Line ‘Kiran-95’ proved worthy general combiner for spikelets spike -1 , grain yield palnt -1 and seed index. Tester, Imdad-05 was identified as good general combiner for tillers plant -1 , spike length, spikelets spike -1 , grains spike -1 , and seed index, while tester Khirman proved promising for grain yield palnt -1 . The cross Khirman x Imdad-05 was found as potential hybrid for grain yield plant -1 , while other two crosses, namely, Anmol-91 x Khirman and Kiran-95 and Khirman also showed desirable specific combining ability for variety of characters. These parents and cross combinations may be used for varietal improvement through the simple selection in segregating generations to increase yield potential of bread wheat genotypes. This may lead in the fixation of both additive and non-additive components, while making improvement in grain yield and its attributes.
Highlights
It is the second highest produced crop afterBread wheat belongs to family Poaceae and only corn [1], offers a great segment of the is regarded as major staple food with highly total food supplements and dietary protein nutritive value, cultivated at large too, it is grown in a range of scale in many countries including Pakistan.environments [2]
The present research was carried-out to determine general combining ability (GCA) and specific combining ability (SCA) effects of different economic traits in a set of line x tester crosses along with five parental lines in which two parents used as lines as three parents as testers of bread wheat (Triticum aestivium L)
Among the female parents (Table 2), Anmol-91 expressed maximum positive GCA effects (2.82), while among the male parents, maximum GCA (0.87) was recorded in Imdad-05, these results indicate that parent with positive GCA effects retain more additive genes, providing opportunities for potential improvement of grains spike-1 in wheat verities
Summary
It is the second highest produced crop afterBread wheat belongs to family Poaceae and only corn [1], offers a great segment of the is regarded as major staple food with highly total food supplements and dietary protein nutritive value, cultivated at large too, it is grown in a range of scale in many countries including Pakistan.environments [2]. Results and discussion The present research was carried-out to determine general combining ability (GCA) and specific combining ability (SCA) effects of different economic traits in a set of line x tester crosses along with five parental lines in which two parents used as lines (female parents) as three parents as testers (male parents) of bread wheat (Triticum aestivium L).
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