Gene action controlling earliness and grain yield in bread wheat, Triticum aestivum L.
2009
El-Moselhy, O.M.A. | Mohamed, M.A. | Alkaddoussi, H.A. | Awaad, H.A. | Swelam, A.A.
Diallel cross among six bread wheat genotypes were used to study the genetic behaviour of earliness, grain yield and protein content. The parents included two early (Sids 4 and Line 28), two moderate (Sakha 93 and Giza 168) and two late genotypes (Gemmeiza 9 and Gemmeiza 10) The results indicated that additive and dominance gene effects were significant and involved in the inheritance of all the studied characters. Additive component played the major role in the inheritance of days to heading, anthesis and maturity. Thus, phenotypic selection would be an effective procedure for improving these characters. Whereas, the dominance genetic variance was the main component controlling the inheritance of grain filling period, grain filling rate, grain yield/plant and protein content, under the early sowing date. The F value coupled with KD/KR ratio, indicated an excess of dominant increasing alleles for all characters, except days to maturity under the early sowing date and protein content under the late sowing one. Heritability estimates in narrow sense were high for earliness characters, relatively high for grain filling period and protein content and low for grain yield/plant.
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