Intergeneric and Trigeneric Wheat Hybrids — Production and Cytological Characterbtics

1999 ◽  
Vol 27 (1-2) ◽  
pp. 71-77 ◽  
Author(s):  
Nedyalka D. Tyankova
Keyword(s):  
Wheat Hybrids

Influence of heterosis value in spring wheat hybrids on the efficiency of valuable selection

2020 ◽  
Author(s):  
A. G. Abramov ◽  
◽  
I.N. Abramova
Keyword(s):  
Grain Size ◽  
Spring Wheat ◽  
Grain Weight ◽  
Irkutsk Region ◽  
Wheat Hybrids

The article presents the results of the influence of the magnitude of heterosis on the main elements of the formation of yield (grain size and productivity of the main spike) of spring wheat in the Irkutsk region. The following were used as maternal varieties: Irgina, Krasnoyarskaya 83, Tulun 15, Tselinnaya 60, Altayskaya 92, Niva 2 and a variety from Mongolia Orkhon 85, as testers - Skala, Angara 86, Tulunskaya 12 The best indicators of hypothetical heterosis were manifested by the number of grains in ear in combinations Krasnoyarskaya 83 × Angara 86, Krasnoyarskaya 83 × Skala, Altai 92 × Skala (81.6 ... 85.7%). In terms of grain weight from the main spike, the best results of hypothetical heterosis were noted in hybrid combinations Krasnoyarskaya 83 × Angara 86, Orkhon 85 × Angara 86, Ni-va × Angara 86, Altai 92 × Angara 86 (100.0 ... 130.7%) ... Krasnoyarskaya 83 × Angara 86, Altai 92 × Angara 86, Or-khon × Angara 86 are recognized as the best hybrid combinations that can give the greatest yield of transgressive forms of elite plants.

VARIATION IN THE TRANSMISSION OF UNIVALENT CHROMOSOMES FROM PENTAPLOID WHEAT HYBRIDS

1968 ◽  
Vol 10 (4) ◽  
pp. 908-912 ◽  
Author(s):  
F. H. Alston ◽  
J. K. Jones
Keyword(s):  
Chinese Spring ◽  
Chromosome Complement ◽  
Aegilops Squarrosa ◽  
Wheat Hybrids

Univalent transmission was studied in aneuploids from pentaploid (AABBD) wheat hybrids. Two groups of such hybrids were used: one group carried heterozygous AABB chromosome complements derived from crosses between T. aestivum cv. Chinese Spring monosomics XV-XXI and T. durum, cvs. Nursi and Samara, 2n = 28; the second group had homozygous AABB complements and came from crosses between the amphiploid (T. durum cv. Carleton × Aegilops squarrosa) and T. durum cv. Carleton. The transmission of univalent D chromosomes was markedly reduced when most of the AABB chromosome complement was derived from T. durum.

scholarly journals Are Wheat Hybrids More Affected by Weed Competition than Conventional Cultivars?

Agronomy ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 526
Author(s):  
Marco Milan ◽  
Silvia Fogliatto ◽  
Massimo Blandino ◽  
Francesco Vidotto
Keyword(s):  
Vegetation Index ◽  
Normalized Difference Vegetation Index ◽  
Weather Conditions ◽  
Hybrid Wheat ◽  
Wheat Varieties ◽  
Canopy Development ◽  
Productivity Losses ◽  
Crop Density ◽  
Weed Infestation ◽  
Wheat Hybrids

Seeding rates of hybrid wheat varieties are typically much lower than conventional varieties due to their higher seed costs, which could potentially delay canopy development leading to greater weed pressures. To test whether hybrid wheat crops are more affected by weed pressure than conventional cultivars, a conventional variety (“Illico”) and a hybrid (“Hystar”), were compared in a three-year (2012–2016) field study at two sites in Northern Italy. Weed infestation was mainly characterized by weeds with an early growth pattern, and in only a few seasons did the hybrid crops show a higher weed density than the conventional cultivar. Despite the lower sowing rate, hybrids were able to achieve a similar crop density to the conventional cultivar even in years of delayed sowing or dry weather conditions. Normalized Difference Vegetation Index values were generally similar between cultivars across the years, regardless of the presence of weeds, except during the springtime. Occasionally, the test weight was significantly higher in weeded plots than un-weeded plots. Overall, the two cultivars showed similar yields within the same year. These results indicate that on fields with a low weed burden, and where these weeds emerge early, cultivars may not be significantly affected by productivity losses.

scholarly journals Inheritance of spike length in F3, F4 and F5 wheat hybrids obtained by different selection methods

2012 ◽  
Vol 49 (1) ◽  
pp. 28-33
Author(s):  
Jankovic Snezana ◽  
Prodanovic Slaven ◽  
Mandic Violeta ◽  
Zoric Dragica
Keyword(s):  
Spike Length ◽  
Selection Methods ◽  
Wheat Hybrids

Wheat and Wheat Hybrids

2019 ◽  
pp. 77-102
Author(s):  
Xueling Zheng ◽  
Jiaying Shang ◽  
Qinghua Yue ◽  
Mingfei Li
Keyword(s):  
Wheat Hybrids
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