Abstract
Vernalization and photoperiod sensitivity genes play an important role in geographical adaptation, affect cultivar’s agronomical traits and yield potential. Therefore, understanding the distribution and allelic variation of these genes in the germplasm is crucial for any wheat and triticale selection program. Our laboratory has conducted survey of 86 spring triticale cultivars for the photoperiod sensitivity (Ppd-B1) and vernalization (Vrn-A1, Vrn-B1 and Vrn-B3) genes using molecular markers. Dominant Vrn-A1 allele was found in 50% of the spring triticale cultivars, and the dominant Vrn-B1 allele in 53.4% of the cultivars. Dominant allele of the Vrn-B3 gene has not been found among the collection cultivars, every sample contained only the recessive allele of the gene. A total of 25 cultivars carrying dominant alleles of both the Vrn-A1 and the Vrn-B1 loci were identified in the collection. Identification of the collection cultivars by Ppd-B1 gene showed that all samples are carrying the photoperiod-sensitive recessive allele Ppd-B1b. It was established that in conditions of the southeast of Kazakhstan samples that carried the dominant Vrn-B1 and the recessive Vrn-A1 alleles had a higher rate of development. Three cultivars (Cheetah, Whale, Fahad 8-2*2// PTP U 3878) with the highest rate of development were selected for breeding as sources of early ripening. Data on the allelic variation of vernalization and photoperiod sensitivity genes in collection germplasm will enable proper planning and integration of molecular markers into the triticale selection programs. This data would be useful for development of elite triticale cultivars, carrying desirable alleles of vernalization and photoperiod sensitivity genes, with higher yield potential and better grain quality, suitable for a wide range of growing conditions.
01 Introduction
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02 References
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