Abstract
A half diallel cross among nine new yellow maize inbred lines, i.e. Gm. 500, Gm. 505, Gm. 507, Gm. 508, Gm. 509, Gm. 515, Gm. 518, Gm. 520 and Gm. 522 was made in 2014 summer season. Parental inbred lines and their FR 1 R crosses along with two yellow commercial check hybrids, SC162 and SC168 were evaluated in randomized complete block design with four replications at two locations (Gemmeiza and Sids) in 2015 summer season to study the combining ability in order to identify the most superior parental inbred lines that produce superior hybrids and develop high yielding new yellow single crosses. Results indicated that mean squares among crosses exhibited highly significant for all studied traits at both locations and their combined. Mean squares due to general combining ability (GCA) and specific combining ability (SCA) were significant or highly significant for all studied traits at both locations and their combined, except GCA for ear height at Gemmaiza and SCA for plant height and ear height at Sids. The ratio of GCA/SCA was more than unity for all studied traits at both locations and their combined, except plant height and ear height at Gemmaiza, days to 50% silking at Sids and plant height at the combined data. These results indicating that the additive genetic effects were more important and played the major role in the inheritance of these studied traits. Based on combinedPR 1 R (Gm.500) and PR 5 R (Gm.509) could be considered as the best combiners for earliness, as well as PR 2 R (Gm.505), PR 4 R (Gm.508), PR 7 R (Gm.518) and PR 8 R (Gm.520) for increasing grain yield. At combined four crosses No. 34 (Gm. 518 Gm. 520 and 25 (Gm. 508 Gm. 520) were the best combinations, where they recorded the highest percentages of superiority in grain yield over both commercial hybrids SC 162 and SC 168.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 7
Claim · model-written summary
Crosses differed significantly for all studied traits at both locations and combined.
Verbatim
t0“YELLOW MAIZE”
e0“mean squares among crosses exhibited highly significant for all studied traits at both locations and their combined”
Claim · model-written summary
General and specific combining ability differed significantly for most traits, with stated exceptions.
Verbatim
t0“YELLOW MAIZE”
e0“Mean squares due to general combining ability (GCA) and specific combining ability (SCA) were significant or highly significant for all studied traits at both locations and their combined, except GCA for ear height at Gemmaiza and SCA for plant height and ear height at Sids”
Claim · model-written summary
The GCA/SCA ratio exceeded unity for most traits, with stated exceptions.
Verbatim
t0“YELLOW MAIZE”
e0“The ratio of GCA/SCA was more than unity for all studied traits at both locations and their combined, except plant height and ear height at Gemmaiza, days to 50% silking at Sids and plant height at the combined data”
Claim · model-written summary
Additive genetic effects were interpreted as predominant in inheritance of the studied traits.
Verbatim
t0“YELLOW MAIZE”
e0“the additive genetic effects were more important and played the major role in the inheritance of these studied traits”
Claim · model-written summary
Gm.500 and Gm.509 were the best combiners for earliness.
Verbatim
t0“YELLOW MAIZE”
e0“(Gm.500) and PR 5 R (Gm.509) could be considered as the best combiners for earliness”
Claim · model-written summary
Gm.505, Gm.508, Gm.518 and Gm.520 were identified as combiners for increased grain yield.
Verbatim
t0“YELLOW MAIZE”
e0“(Gm.505), PR 4 R (Gm.508), PR 7 R (Gm.518) and PR 8 R (Gm.520) for increasing grain yield”
Claim · model-written summary
Crosses 34 and 25 had the highest grain-yield superiority over both commercial hybrids.
Verbatim
t0“YELLOW MAIZE”
e0“four crosses No. 34 (Gm. 518 Gm. 520 and 25 (Gm. 508 Gm. 520) were the best combinations, where they recorded the highest percentages of superiority in grain yield over both commercial hybrids SC 162 and SC 168”