TY - JOUR
T1 - A comparison of ovule abortion in self-incompatible and self-fertile lines of white clover (Trifolium repens L.)
AU - Marshall, Athole
AU - Cowan, Alexander
AU - Michaelson-Yeates, T. P. T.
PY - 1999/2
Y1 - 1999/2
N2 - Plants of white clover (Trifolium repens L.) cv. Olwen and three genotypes of each of three self-fertile inbred lines of white clover were grown from seed in a bee-proof glasshouse. When in flower, a series of crosses within and between the self-incompatible (SI) and self-fertile (SF) lines was made and ovule growth and seed production measured 7 and 28 days after pollination (DAP) respectively. At harvest, the SF plants had a lower proportion of ovules aborting and more seeds per floret than the SI plants, though the mean seed weight of the SI plants was greater. Ovule abortion was observed in both the SF and SI plants though the number of aborted ovules was greater in the SI plants. The stage when abortion occurred also differed. All of the ovule abortion in the SI plants occurred within a 7-day period after pollination. In the SF plants, some abortion was observed in this period but also between 7 and 28 DAP, when the seed was harvested. This suggested that abortion, up to 7 DAP, is due primarily to genetic factors whilst subsequent abortion, between 7 and 28 DAP, is due to non-genetic factors.
AB - Plants of white clover (Trifolium repens L.) cv. Olwen and three genotypes of each of three self-fertile inbred lines of white clover were grown from seed in a bee-proof glasshouse. When in flower, a series of crosses within and between the self-incompatible (SI) and self-fertile (SF) lines was made and ovule growth and seed production measured 7 and 28 days after pollination (DAP) respectively. At harvest, the SF plants had a lower proportion of ovules aborting and more seeds per floret than the SI plants, though the mean seed weight of the SI plants was greater. Ovule abortion was observed in both the SF and SI plants though the number of aborted ovules was greater in the SI plants. The stage when abortion occurred also differed. All of the ovule abortion in the SI plants occurred within a 7-day period after pollination. In the SF plants, some abortion was observed in this period but also between 7 and 28 DAP, when the seed was harvested. This suggested that abortion, up to 7 DAP, is due primarily to genetic factors whilst subsequent abortion, between 7 and 28 DAP, is due to non-genetic factors.
KW - abortion
KW - fertilisation
KW - self-fetility
KW - pollination
KW - seedset
KW - white clover
KW - Trifolium repens L.
UR - http://hdl.handle.net/2160/43182
U2 - 10.1111/j.1744-7348.1999.tb05243.x
DO - 10.1111/j.1744-7348.1999.tb05243.x
M3 - Article
SN - 0003-4746
VL - 134
SP - 121
EP - 124
JO - Annals of Applied Biology
JF - Annals of Applied Biology
IS - 1
ER -