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| Web URL(s): | https://www.crops.org/publications/cs/pdfs/36/1/CS0360010009
Last checked: 08/05/2010
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| Publication Type:
| Refereed |
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| Author(s): | Mazzucato, Andrea;
Falcinelli, Mario;
den Nijs, Anton P. M. |
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| Author Affiliation: | Instituto di Miglioramento Genetico Vegetale, Universita degli Studi di Perugia, Borgo XX Giugno 74 06100, Perugia, Italy; DLO-Centre for Plant Breeding and Reproduction Research (CPRO-DLO), P.O. Box 16, 6700 AA, Wageningen, the Netherlands |
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| Title: | Estimation of parthenogenesis frequency in Kentucky bluegrass with auxin-induced parthenocarpic seeds |
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| Section: | Crop breeding, genetics and cytology
Other records with the "Crop breeding, genetics and cytology" Section
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| Source: | Crop Science. Vol. 36, No. 1, January/February 1996, p. 9-16. |
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| Publishing Information: | Madison, WI: Crop Science Society of America |
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| # of Pages: | 8 |
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| Keywords: | TIC Keywords: Progeny testing; Breeding program; Poa pratensis; Apomixis; Auxins; Clones; Cytology; Parthenogenesis
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| Abstract/Contents: | "To estimate the frequency of apomixis in Kentucky bluegrass (Poa pratensis L.) by use of traditional embryo sac classification and progeny testing methodologies is difficult and time consuming. This study was conducted to test the applicability of the auxin test, a recently developed technique that allows the asexual potential to be estimated quickly as the frequency of auxin-induced, endospermless grains containing one or more parthenogenetic embryos. Frequency of parthenogenesis was estimated by the auxin test for eight clones in two seasons and two locations. The 2,4-D (2,4-dichlorophenoxyacetic acid) induction of endospermless grains ranged from 50 to 100%. Two clones were 100% sterile, while the others presented sterility ranging from 2 to 63%. Expression of parthenogenesis was fairly stable within and between environments, suggesting a strong genetic control. Differences in parthenogenesis frequency between clones were evident. Statistical analysis based on pooled data discriminated highly (87-89%), intermediate (78%), and moderate (69-73%) parthenogenetic clones. Estimates of parthenogenesis frequency obtained by embryo sac analysis were similar to or lower than those from the auxin-induction test. Estimates of apomicitic reproduction by progeny tests were usually higher than both estimates of parthenogenesis. Auxin-induced grains of one clone were analyzed by histological sections. Most of the embryos in the parthenogenetic ovules and grains (80%) seemed normal with regard to position, shape, and cell pattern. It is therefore concluded that the auxin test is a workable technique for determining the percentage of parthenogenesis in breeding programs." |
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| Language: | English |
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| References: | 40 |
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| Note: | Pictures, b/w
Figures
Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Mazzucato, A., M. Falcinelli, and A. P. M. den Nijs. 1996. Estimation of parthenogenesis frequency in Kentucky bluegrass with auxin-induced parthenocarpic seeds. Crop Sci. 36(1):p. 9-16. |
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| Web URL(s):
https://www.crops.org/publications/cs/pdfs/36/1/CS0360010009
Last checked: 08/05/2010
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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MSU catalog number: SB 183 .C7 |
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