Open AccessEfficient Method of Choosing Potential Parents and Hybrids: Line Tester Analysis of Spring Wheat (Triticum aestivum L.) Cultivars
Author(s) -
M. J. Baloch,
I. A. Mallano,
Abdul Wahid Baloch,
Wajid Ali Jatoi,
N. F. Veesar
Publication year - 2011
Publication title -
pakistan journal of scientific and industrial research. series b: biological sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.117
H-Index - 5
eISSN - 2223-2567
pISSN - 2221-6421
DOI - 10.52763/pjsir.biol.sci.54.3.2011.117.121
Subject(s) - biology , hybrid , spike (software development) , cultivar , crop , horticulture , yield (engineering) , forensic science , agronomy , genetics , management , metallurgy , economics , materials science
The study was conducted to estimate the general combining ability (GCA) and specific combining ability (SCA) of wheat genotypes crossed in a line ´ tester fashion. The mean squares due to F1 hybrids, female lines, male testers/pollinators and lines ´ tester interaction were significant for majority of the
characters studied. The significance of GCA and SCA variances thus suggested that both additive and non- additive genes were controlling majority of the characters, yet additive genes were more prominent because variances due to GCA by and large were higher than due to SCA. Among the three female lines evaluated, Khirman displayed maximum positive GCA effects for spike length (0.08) and seeds/spike (0.67), while other female lines which showed maximum positive GCA effects were Mehran for plant height (3.05), number of tillers/plant (1.00), spikelets/spike (1.92) and seed index (3.42) and Kiran for seeds/spike (0.67) and yield/plant (1.86). From the male testers, TD-1 exhibited greater GCA effects for number of tillers/plant (2.96), spikelets/spike (0.25), seed index (0.61) and yield/plant (2.22), whereas, Marvi displayed highest positive GCA effects for plant height (2.88), spike length (0.37) and seeds/spike (6.41). The specific combining ability estimates indicated, if hybrid crop development is feasible then, crosses Mehran ´ TD-1 for spike length; Kiran ´ TD-1 for plant height and seeds/spike and Khirman ´ Marvi for number of tillers/plant, spikelets/spike, seed index and yield/plant may be the hybrids of choice.