HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Figures Only Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in ISI Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (2) Citing Articles via Google Scholar Google Scholar Articles by Santos, A. G. Articles by Murphy, J. P. Search for Related Content PubMed Articles by Santos, A. G. Articles by Murphy, J. P. Agricola Articles by Santos, A. G. Articles by Murphy, J. P. Related Collections Crop Cytology Oat

CROP BREEDING, GENETICS & CYTOLOGY

A Cytological Marker Associated with Winterhardiness in Oat

^a Delta and Pine Land Co., 100 Main St., Scott, MS 38772
^b USDA-ARS, Raleigh
^c Dep. of Agronomy and Horticulture, Brigham Young University, 275 WIDB, Provo, UT 84602
^d Dep. of Crop Science, Box 7629, North Carolina State University, Raleigh, NC 27695-7629

^* Corresponding author (paul_murphy{at}ncsu.edu)

The intergenomic translocation T7C-17 occurs at different frequencies in fall- versus spring-sown hexaploid oat (Avena sp.) germplasm. The objectives of this experiment were to evaluate crown meristem freeze tolerance and winter field survival among 94 random F₄–derived lines from the cross between the cultivars Wintok (T7C-17, winterhardy) and Fulghum (non-T7C-17, less winterhardy) and to examine the association between these winterhardiness traits and T7C-17. Crown meristem freeze tolerance was evaluated in a three-replicate randomized complete block design in controlled environment growth cabinets. Field survival was evaluated in a three replicate randomized complete block design at Laurel Springs, NC during the 1999–2000 season. Greater crown meristem freeze tolerance and greater winter field survival were associated with the presence of T7C-17. Lines heterogeneous for the translocation had similar levels of crown meristem freeze tolerance and field survival as lines homozygous for the translocation. Twenty-two percent of the variation in crown meristem freeze tolerance and 27% of the variation in field survival was accounted for by translocation status. The observed frequencies of translocation homozygotes and heterozygotes did not fit the expected frequencies for single factor segregation in the F₄ generation. There were almost threefold as many homozygotes with the translocation as homozygotes without the translocation which indicated preferential selection for T7C-17 during inbreeding. Our results suggested that T7C-17 might be isolating, in terms of recombination, either a dominant allele or a group of loci conditioning winterhardiness in our population.

This article has been cited by other articles:

				D. R. Wooten, D. P. Livingston III, J. B. Holland, D. S. Marshall, and J. P. Murphy Quantitative Trait Loci and Epistasis for Crown Freezing Tolerance in the 'Kanota' x 'Ogle' Hexaploid Oat Mapping Population Crop Sci., January 16, 2008; 48(1): 149 - 157. [Abstract] [Full Text] [PDF]

				D. R. Wooten, D. P. Livingston III, E. N. Jellen, K. J. Boren, D. S. Marshall, and J. P. Murphy An Intergenomic Reciprocal Translocation Associated with Oat Winter Hardiness Component Traits Crop Sci., September 1, 2007; 47(5): 1832 - 1840. [Abstract] [Full Text] [PDF]