A co-owner is legally entitled to transfer her undivided share, even during pendency of a partition suit.
However, such transfer is governed by the doctrine of lis pendens under section 52 of Transfer of Property Act, 1882. The transfer is valid but it is subject to the final decree in the pending partition suit, the transferee (your daughter) steps into your shoes and becomes bound by the outcome of the case.
It does not invalidate the transfer, but it prevents defeating the court process.
A Release Deed is normally executed between co-owners, releasing one’s share in favour of another co-owner. However, if the release deed is executed in favour of only one daughter, it may be objected to by the son stating that it is an attempt to prejudice partition. Though legally valid, it is sometimes challenged as inequitable in partition litigation.
Instead the transfer of your undivided share in favour of your daughter by executing a registered settlement deed will be a better option because as you are entitled to one fourth share in the property, you may transfer it to anyone of your choice which nobody can object to.
If you decide to proceed with settlement deed you proceed, ensure that the deed clearly states:
You are transferring only your undivided 1/4th share
Property is subject to pending partition suit (mention case number & court)
Transfer is subject to final decree.
This will protect your litigation interests