Diallel Analysis of Some Important Grain Yield Traits in Bread Wheat Crosses

Abstract

One of the most important tasks in wheat breeding program is development of high yielding wheat cultivars by crossing the lines with good general combining ability (GCA) and selecting desirable genotypes within its segregating population for grain yield traits. The objective of this study was to estimate the combining ability and gene action involved in the expression of the traits grain weight per spike and grain weight per plant of wheat in F 1 generations, in 5 × 5 half diallel cross of bread wheat varieties (Triticum aestivum L.). The results of applying combining ability analysis indicated that among the parents, genotypes Sara, Pobeda and Renesansa were found to be the best general combiners for the both investigated traits. The best specific crosses for both traits were Sara/Partizanka, Pobeda/Sara, Renesansa/Partizanka, Partizanka/Pesma and Pobeda/Pesma. Most of the specific crosses involved high × high, high × low and low × low general combiners. The results of regression analysis, as well as the analyses of components of genetic variation indicated overdominance in the inheritance of examined traits suggested that selection in later segregating generations may lead to fairly good improvement in these characters.

Combining Ability of Some Bread Wheat Genotypes for yield and its Components under Normal Watering and Water-Stress Conditions

“…The GCA / SCA ratios were found to be greater than unity, suggesting that, the additive gene effect was much larger and more important than non-additive gene effects in the inheritance of these traits. These results are in agreement with those obtained by Burungale et al, (2011) Mandal and Madhuri (2016) and Ljubičić et al, (2017). It is interesting to note that breeding procedures that take advantage of additive genetic variance would be recommended for wheat breeding programs to improve tolerance for water stress traits.…”

Multivariate Interaction Analysis of Winter Wheat Grown in Environment of Limited Soil Conditions

“…At the same time, global demand for wheat is estimated to increase by 2050, as a consequence of growing dietary requirements of an increasing world population [ 23 ]. Keeping this in view, the wheat breeders have to share an urgent need to increase wheat grain yield potential by developing new wheat varieties with desirable genetic make-up [ 24 , 25 ]. Considering that much more attention needs to be given not only to the quantity, one of the greatest challenges to wheat breeders is to obtain a wheat genotypes with high mean yield and wide adaptation to the various environments, even in less productive soils, such as a solonetz soil type.…”

Analisis rata-rata generasi jagung Unpad toleran naungan pada sistem agroforestri dengan albizia di Jawa Barat

“…Analisis menggunakan uji skala gabungan dengan model genetik aditifdominan m [d] [h] menunjukkan hal yang sama dengan uji skala, bahwa model aditifdominan tidak sesuai pada karakter tinggi tanaman. Hal ini menunjukkan bahwa pada persilangan tersebut ada interaksi antar alel (Noori et al, 2016;Verma et al, 2018 (Li et al, 2008;Ljubičić et al, 2016 (Barmawi et al, 2013;Syafruddin et al, 2012;Trikoesoemaningtyas et al, 2017). Heritabilitas arti luas yang tinggi menunjukkan bahwa seleksi yang dilakukan pada karakter ini akan memberikan peluang mendapatkan kemajuan seleksi yang tinggi (kemajuan genetik "∆G") (Shereen & El-Nahrawy, 2018 Rekapitulasi hasil analisis menggunakan uji skala individual dan uji skala gabungan terhadap karakter tinggi tanaman, tinggi tongkol, panjang ruas, kadar klorofil, diameter tongkol, jumlah baris per tongkol, bobot tongkol per plot dan bobot pipil per plot, disajikan pada Tabel 7.…”