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|Title: ||Flowering and fruiting of tomatoes (lycopersicon esculentum mill.) in Qassim, Saudi Arabia during summer|
|Authors: ||Warrag, M.O.A.|
|Keywords: ||Flowering and Fruiting|
Tomatoes Lycopersicon esculentum Mill.
|Issue Date: ||1991 |
|Publisher: ||King Saud University|
|Citation: ||Journal of King Saud University, Agricultural Sciences: 3(2); 241-520|
|Abstract: ||The tomato cultivar "Pearson AI-improved" was planted on three different dates starting January 1987 and 1988 with monthly intervals, to define the reproductive attributes and abnormalities implicated in the Iow fruit yield of field-grown tomato usually encountered in Qassim, Saudi Arabia, during summer. The total fruit yield declined significantly with delay in planting and progress of summer. This was brought about, primarily, by the significant decline in both fruit set and average fruit weight in February planting, in addition to the reduction in the number of flowers produced in March planting. The failure of fruit s~t in February planting was mainly due to the lack of pollination resulting from anther indehiscence and stigma exsertion, and was due to the failure of fertilization and, probably, embryo abortion in March planting. The failure of fertilization could be attributed to anther indehiscence, Iow pollen production and viability, stigma exsertion and Iow ovule viability. The decline in average fruit weight was, appa-rently, due to the decline in number of seeds per fruit and this, in turn, could be attributed to the same for ementioned abnormalities responsible for fruit set failure. The high temperature prevailing during flowering was apparently the most important climatic factor inducing these abnormalities encountered at late plantings. Therefore, heat tolerant genotypes may be used to develop cvs suitable for summer conditions in Qassim.|
|Appears in Collections:||Journal of the King Saud University - Agricultural Sciences|
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