Hybrid Vigor Induced by Cross-breeding Enhances Canopy Photosynthesis and Fruit Yield of Japanese Sweet Pepper

The effect of hybrid vigor on the fruit yield in Japanese sweet pepper (Capsicum annuum L.) was investigated by comparing dry matter production, canopy light-intercepting characteristics and canopy photosynthesis of F1 cultivars to those of their parent lines. The greater yields in the F1 cultivars...

Full description

Saved in:
Bibliographic Details
Published inEnvironment control in biology Vol. 57; no. 2; pp. 29 - 38
Main Authors NABESHIMA, Satowa, YASUTAKE, Daisuke, KITANO, Masaharu
Format Journal Article
LanguageEnglish
Japanese
Published Fukuoka Japanese Society of Agricultural, Biological and Environmental Engineers and Scientists 01.04.2019
Japan Science and Technology Agency
Subjects
Breeding
Canopies
Canopy
Capsicum annuum
Capsicum annuum L
Crop yield
Cross-breeding
Cultivars
Dry matter
dry matter production
Electromagnetic absorption
Foliage
Fruits
growth analysis
Herbivores
Heterosis
Hybrid vigor
Hybridization
Leaf area
Light absorption
Lines
Partitioning
Peppers
Photosynthesis
photosynthetic vertical profile
Plant breeding
Plant growth
Profiles
Vertical profiles
Vigor
Online AccessGet full text

Cover

More Information
Summary:The effect of hybrid vigor on the fruit yield in Japanese sweet pepper (Capsicum annuum L.) was investigated by comparing dry matter production, canopy light-intercepting characteristics and canopy photosynthesis of F1 cultivars to those of their parent lines. The greater yields in the F1 cultivars were caused by both higher dry matter partitioning rate into fruits and total dry matter production. There was no difference in the leaf photosynthetic capacity between the F1 cultivars and their parent lines. The canopy photosynthetic rate, total dry matter production, and yield showed significantly positive correlations with the photosynthetic photon flux absorbed within the plant canopy. The hybrid vigor caused higher plant statures with richer foliage, which led to more effective vertical profiles of leaf area, light absorption, and photosynthesis within the respective canopies. These factors caused a sufficiently higher canopy photosynthesis to produce greater dry matter production and maintain a higher dry matter partitioning rate into fruits, which resulted in higher yields. These results suggest that the vertical profiles of light-intercepting characteristics and photosynthesis within the canopies, which are evaluated by agro-meteorological methodology, are effective selection indices for breeding plants with higher yields.
ISSN:1880-554X
1883-0986
DOI:10.2525/ecb.57.29