The effect of the seeding rate on the formation of yield characters in the genetic resources of winter wheat (Triticum aestivum) with a non-standard morphological spike structure
1999
Vranova, J. | Bednar, P. (Mendelova Zemedelska a Lesnicka Univ., Brno (Czech Republic). Ustav Genetiky) | Martinek, P.
The effect of increasing seeding rates: 2.0; 2.5; 3.0; 3.5; 4.0; 4.5 and 5.0 million germinating seeds (MGS) per 1 ha on yield characteristics of three genetic resources of winter wheat (Triticum aestivum) was studied KM 142-94 with a markedly elongated spike - normal structure (NS) gigas, KM 1307-95 with vertical sessile spikelets (VSS), KM 2217-95 with screwed spike rachis (SCR) and two control varieties, i.e. Astella and Record, were used. The results confirmed the capacity of the KM-genotypes with a higher spike productivity to maintain a higher spike weight even when the seeding rate was higher. The yields of the Astella and Record varieties were on average by 30 % higher. Genotypes with a non-standard morphological spike structure showed a lower tillering capacity and lower number of spikes per 1 square m compared with the controls. Maximal yields were obtained when the seeding rate was lower (3,5-4,5 MGS per 1 ha), while the higher yields of control varieties were obtained with higher seeding rates (4,0-4,5 MGS per 1 ha). The weight af the grain in the spike of genotypes with a non-standard spike morphology was higher with all the seeding rates.
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