Open AccessContinuous selection for seed number per pod and oil content in white mustard
Author(s) -
OLSSON GöSTA
Publication year - 1974
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.1601-5223.1974.tb00932.x
Subject(s) - point of delivery , biology , selection (genetic algorithm) , population , horticulture , yield (engineering) , zoology , agronomy , demography , artificial intelligence , computer science , materials science , sociology , metallurgy
By twelve years of positive and negative selection for number of seeds per pod in ripe white mustard, the number has increased from 5.41 to 9.06, i.e. with 3.65 seeds per pod, and decreased with 2.20 down to 3.21 seeds per pod. By selection before the flowering period in part of the positive selection material, the number of seeds per pod was increased to 10.66. Selection for low number of seeds per pod resulted also in a decreased fertility. By continuous positive selection during twelve years oil content was increased with 7.46 %, and by negative selection decreased with 7.32 %. The effects of selection are very distinct and so far there is no tendency to spontaneous reversals of the effects obtained. The increase in oil content has been possible without any decrease in seed yield. The selection for “high oil content” resulted in material which out‐yielded the mother variety Primex in seed yield with 5 % and in oil yield with 19 %. There is a negative correlation between 1000‐grain weight and number of seeds per pod, and in a population of white mustard 1000‐grain weight and oil content are also negatively correlated. Especially the positive selection for oil content is important for practical plant breeding.