Influence of environments on the development of multivariate structures in a barley composite cross at three locations
| Autor: | Qifa Zhang, Sakti Jana, Mohammad A. Saghai-Maroof |
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| Rok vydání: | 1989 |
| Předmět: | |
| Zdroj: | Genome. 32:40-45 |
| ISSN: | 1480-3321 0831-2796 |
| Popis: | Starting in the F4 generation, successive generations of a barley composite cross (CCXXI) were propagated in three North American locations. Data were collected for seven isozyme loci and 12 morphological characters from three generations (F5, F11, or F12 and F18 or F19) at each location and were analyzed for evolutionary changes of multilocus associations. Rates of change of multilocus gametic frequencies for isozyme loci varied according to location. The changes occurred faster at the temperate northern locations (Saskatoon and Beaverlodge) than at the Mediterranean-type southern (Davis) location, which resulted in a large divergence in genetic composition of the population over a relatively short period. The repatterning of the genomic structure occurred at a faster rate in later generations (between F11 or F12 to F18 or F19) than in earlier generations (between F5 and F11 or F12). Canonical correlation analyses between the two sets of characters (morphological and isozymic) indicated that different structures of covariation evolved in different locations. Our results clearly demonstrate the environmental influence on the evolution of correlated multilocus complexes in experimental barley populations.Key words: Hordeum vulgare, population dynamics, multilocus genotype, canonical correlation analysis, environmental influence, genetic divergence. |
| Databáze: | OpenAIRE |
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