A novel source of cytoplasmic male sterility in Calibrachoa pubescens

Authors
Colombo, Noemi; Coviella, Maria Andrea; Hagiwara, Juan Carlos
Publication Year
2017
Language
English
Format
article
Status
Published version
Description
Calibrachoa pubescens is a species native from the south of Brazil, Uruguay and northeast Argentina. An accession identified as 7.3.1.1 was collected at San Martín Department in Corrientes Province, Argentina and is included in the calibrachoa breeding program at the Institute of Floriculture, INTA. This accession is male sterile and produces male-sterile progeny, characterized by the lack of pollen production. Male sterility may be controlled by nuclear or cytoplasmic genes with each type presenting a different mode of inheritance. The objective of this research was to present a novel source of cytoplasmic male sterility in Calibrachoa pubescens. Crosses were made in the greenhouse between the male-sterile line 7.3.1.1 as the female parent and seven male-fertile lines of diverse origin. F1s were backcrossed and self-pollinated. Individual plants of the progenies were classified as male-fertile or male-sterile according to pollen viability. Analyses of observed segregations showed that male sterility observed in 7.3.1.1 results from the interaction of a male sterile cytoplasm and nuclear restorer genes. A novel male sterile cytoplasm is now available for breeders. Main advantages of cytoplasmic male sterility in ornamentals breeding are: efficient hybrid production, increased flower longevity, avoidance of pollen allergens and control of plant invasiveness.
Inst. de Genética "Ewald A. Favret"- IGEAF
Fil: Colombo, Noemi. INTA. Instituto de Genética; Argentina
Fil: Coviella, Maria Andrea. INTA. Intistuto de Floricultura; Argentina
Fil: Hagiwara, Juan Carlos. INTA. Instituto de Floricultura; Argentina
Source
Ornamental Horticulture 23 (3) : 311-318 (2017)
Subject
Plantas Ornamentales
Fitomejoramiento
Esterilidad Masculina Citoplásmica
Ornamental Plants
Plant Breeding
Cytoplasmic Male Sterility
Calibrachoa pubescens
Access level
Open access
License
Repository
INTA Digital (INTA)
Institution
Instituto Nacional de Tecnología Agropecuaria
OAI Identifier
oai:localhost:20.500.12123/1979