Search

Start Over Coverage 187-197

1. Examples from the calculus of variations: II. a degenerate problem

Creator:
Chrastina, Jan
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
Poincaré-Cartan form, degenerate variational integral, and realization problem
Language:
English
Description:
Continuing the previous Part I, the degenerate first order variational integrals depending on two functions of one independent variable are investigated.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

2. Genetically based differences in photochemical activities of isolated maize (Zea mays L.) mesophyll chloroplasts

Creator:
Holá, D., Kočová, M., Körnerová, M., Sofrová, D., and Sopko, B.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
diallel cross, genetic analysis, heterosis, Hill reaction activity, and photosystem 1
Language:
Multiple languages
Description:
Photochemical activity of isolated mesophyll chloroplasts was measured as Hill reaction activity (HRA) and photosystem 1 (PS1) activity in three diallel crosses of maize (Zea mays L.) inbred lines and F1 hybrids. Statistically significant differences between genotypes together with positive heterotic effect in F1 generation were found for both traits studied. These differences were more pronounced when HRA or PS1 activity was expressed per leaf area unit or dry matter unit compared to the expression per chlorophyll content unit. Analysis of variance showed that both the genetic and non-genetic components of variation in the photochemical activity of isolated mesophyll chloroplasts are present in all three diallel crosses examined. The positive heterosis in F1 hybrids probably arises from non-additive genetic effects of a positive dominance type. Additive genetic effects were also statistically highly significant. We found no differences between reciprocal crosses. and D. Holá ... [et al.].
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public