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Effects of preharvest sprouting on the genetic structure of durum wheat ‘landraces’
Author(s) -
Masi P.,
Spagnoletti Zeuli P. L.
Publication year - 1999
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1046/j.1439-0523.1999.00386.x
Subject(s) - preharvest , sprouting , biology , germination , agronomy , prolamin , common wheat , horticulture , storage protein , postharvest , gene , genetics , chromosome
Preharvest sprouting that occurs in wheat might affect seed viability and cause genetic erosion during periodical rejuvenation of durum wheat accessions in a gene bank. Two durum wheat landraces (MG 7713 and MG 7805) that had been rejuvenated for several years and did show a high percentage of presprouted seeds in the lot from the fourth rejuvenation cycle were identified. The frequency of durum and bread wheat genotypes and the distribution of the two species in three seed classes (ungerminated seeds, seeds with swollen embryo and germinated seeds) were studied. The modified phenol test was used to identify durum and bread wheat seeds and the genotypic frequencies within each species were assessed on the basis of acid polyacrylamide gel electrophoretic patterns of gliadin storage proteins. In these two landraces, durum wheat was more susceptible to preharvest sprouting than bread wheat and the frequency of bread wheat seeds significantly increased over the three rejuvenation cycles examined. Despite this, preharvest sprouting did not cause significant changes in the genotypic frequencies observed within species or loss of some genotypes that could not be attributed to susceptibility to sprouting.