Open AccessSelection in tetraploid rye
Author(s) -
HOSSAIN M. GUL,
MOORE KEITH
Publication year - 1975
Publication title -
hereditas
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 50
eISSN - 1601-5223
pISSN - 0018-0661
DOI - 10.1111/j.1601-5223.1975.tb01030.x
Subject(s) - chiasma , biology , bivalent (engine) , meiosis , population , genetics , homologous chromosome , regression analysis , statistics , mathematics , demography , gene , chemistry , organic chemistry , sociology , metal
A comparative study of two populations selected for both seed set and meiosis regularity, and an unselected population, showed variable relationships in euploid plants between chiasma frequency and the frequencies of metaphase‐I configurations. In the population selected for high seed set and meiosis regularity, quadrivalent frequency had a significant positive regression on the frequency of chiasmata. In the unselected population an increase in chiasma frequency was associated with a significant increase in bivalent frequency. In the population selected for low seed set and irregular meiosis the regression, based on individual plant means, of chiasma frequency on quadrivalents was negative and on bivalents was positive and significant. The same regressions, when based on cell population means showed the opposite relationships. That is the chiasma frequency had a significant positive regression on quadrivalent frequency and a negative regression on bivalent frequency. These results are discussed in relation to chromosomal differentiation within the sets of four homologous chromosomes of an autotetraploid.