Seed fertility in tetraploid grapes and their crosses with diploids

Authors

  • B. Narasimham Division of Horticulture, Indian Agricultural Research Institute, New Delhi
  • S. K. Mukherjee Division of Horticulture, Indian Agricultural Research Institute, New Delhi

DOI:

https://doi.org/10.5073/vitis.1970.9.177-183

Abstract

The fruit and seed set as well as the occurrence of empty seeds in diploids, tetraploids and their crosses in five varieties of grapes were studied. Ovule lengths at certain intervals after anthesis in the diploid and tetraploid of one variety have been presented to indicate development of ovules. Late abortions of ovules resulting in empty seededness in tetraploids were found to be related to the shortening of period II of berry growth, earlier and greater accumulation of TSS, the earlier onset of period III and the higher rate of growth of the ovary. The consequent lack of adjustment between the pace of growth of endosperm and the ovary probably led to somatoplasitc sterility.

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Published

2017-02-17

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