Inheritance of vernalization response in three populations of spring wheat

Vernalization responses are known to differ among spring wheat (Triticum aestivum L.) genotypes. Three crosses were made to determine the inheritance of vernalization response in the spring wheat cultivars Cajeme 71, Yecora 70, Glenlea, Pitic 62 and Neepawa. Segregation analyses of days to anthesis...

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Bibliographic Details
Published in:Canadian journal of plant science 1994, Vol.74 (4), p.753-757
Main Author: Jedel, P.E
Format: Article
Language:English
Subjects:
Adaptation to environment and cultivation conditions
Agronomy. Soil science and plant productions
Biological and medical sciences
cultivars
flowering
Fundamental and applied biological sciences. Psychology
genes
Genetics and breeding of economic plants
genotype
inheritance (genetics)
plant breeding
segregation
Triticum aestivum
Varietal selection. Specialized plant breeding, plant breeding aims
vernalization
vrn genes
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Summary:Vernalization responses are known to differ among spring wheat (Triticum aestivum L.) genotypes. Three crosses were made to determine the inheritance of vernalization response in the spring wheat cultivars Cajeme 71, Yecora 70, Glenlea, Pitic 62 and Neepawa. Segregation analyses of days to anthesis were made of the F 2 generation in a growth room (25/15 °C, 16/8 h). Segregation analysis of the F 3 generation was made in a summer greenhouse. Reciprocal crosses between Neepawa and Pitic 62 indicated an early/late/transgressively late ratio of 12:3:1 in the F 2 generation. The F 3 generation results fitted an early/late/transgressively late/segregating ratio of 4:1:1:10. Based on the segregation of transgressively late types from both crosses, it was concluded that the genes for spring habit in Pitic 62 and Neepawa were different and not maternally inherited. The Glenlea/Pitic 62 cross produced one transgressively late segregant in an F 2 population of 97 plants. The data fitted an early/late/transgressively late ratio of 60:3:1, indicating that Glenlea may differ from Pitic at three Vrn loci. Therefore, either Glenlea or Pitic 62 may carry two dominant Vrn alleles. The reciprocal crosses between Yecora 70 and Cajeme 71 did not segregate transgressively late types in the F 2 generation. Therefore, those cultivars had a Vrn allele in common. Selection for vernalization response might be useful when introducing exotic germplasm into spring wheat breeding programs and in manipulating maturity responses. Key words: Vernalization, spring wheat, Vrn genes
ISSN:0008-4220
1918-1833
DOI:10.4141/cjps94-134