Results 261 to 270 of about 74,165 (299)

Lack of floral nectar reduces self-pollination in a fly-pollinated orchid

Oecologia, 2005
One explanation for the widespread absence of floral nectar in many orchids is that it causes pollinators to visit fewer flowers on a plant, and thus reduces self-pollination. This, in turn, could increase fitness by reducing inbreeding depression in progeny and promoting pollen export.
Jana, Jersáková, Steven D, Johnson
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The mechanism and inheritance of intraflower self‐pollination in self‐pollinating variant strains of periwinkle

Plant Breeding, 2001
AbstractThe mechanism and inheritance of intraflower self‐pollination in self‐pollinating variant strains of periwinkle was studied using three self‐pollinating and two non‐self‐pollinating but fully self‐fertile strains. Intraflower self‐pollination in self‐pollinating strains occurred due to the continued growth of the gynoecium beyond the base of ...
R. N. Kulkarni, Y. Sreevalli, K. Baskaran, S. Kumar   +3 more
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Stigma factors regulating self-compatible pollination

Frontiers in Biology, 2010
Pollination is one of the most important steps during fertilization and sexual reproduction in plants, and numerous cell-cell interaction events occur between the pistil and the pollen grain/tube during this process. The pollen-stigma interaction is a highly selective process which leads to compatible or incompatible pollination.
Xin-Qi Gao, Dongzi Zhu, Xiansheng Zhang
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The Makings of Self-Pollination

Science's STKE, 2007
Plants that produce both male and female gametes use various strategies to determine whether they will predominantly self-fertilize or predominantly use pollen from other flowers. Although compatibility of cell surface receptors is part of the story, the geometry of flower parts also affects what pollen lands on the stigma.
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Pollination and self-interference in Nothofagus

Flora - Morphology, Distribution, Functional Ecology of Plants, 2013
Abstract Interference between male and female functions within a monoecious plant may hinder crossing and decrease seed set. We assessed the probability of self-pollination and the effect of self-pollination on cross-pollination for two self-incompatible species: Nothofagus obliqua and N. nervosa .
Cristian Daniel Torres, Javier Guido Puntieri   +1 more
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Breeding Self-Pollinated Crops

1987
The challenge of the plant breeder is to develop better varieties. In this chapter we are concerned with the methods by which new varieties of self-pollinated crop plants originate. Before we proceed into a discussion of these methods, let us consider the question, “What is a variety?”
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Breeding Self-Pollinated Crops

2019
As a matter of fact, breeding procedures and schemes differ with the breeding behaviour of a particular species. At the beginning of each breeding programme, the breeder should decide on the type of cultivar to breed for release to farmers. The breeding method used depends on the type of cultivar to be produced. There are basic types of cultivars, viz.,
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Speciation Under Self-Pollination

1999
Self-pollination introduces automatically reproductive isolation both between lines (within a species) and between species. It is argued that the reproductive isolation barrier caused by this breeding system affects considerably the mode of speciation in autogamous plants: it frequently substitutes for geographic separation, and facilitates the build ...
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Facultative Self-pollination in Island Irises

American Midland Naturalist, 1997
-Blue flag (Irzs versicolor) is an insect-pollinated clonal plant found in wet habitats throughout northeastern North America. Our study of an isolated population on Kent Island, New Brunswick, showed that blue flag was self-compatible. Moreover, we found no evidence of inbreeding depression.
R. Andrew Zink, Nathaniel T. Wheelwright
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Pollination of self-fertile sweet cherry

Journal of Horticultural Science, 1979
SummaryPrunus avium L. ‘Stella’ was shown to be fully self-fertile but bee pollination improved final fruit set and number of fruits harvested, compared to pollination by wind and gravity. Pollination of individual flowers by their own pollen was at least six times more frequent than by pollen from more distant flowers.
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