adoption

As per my opinion, if the property is ancestral one, then  your client  and his brother/ s  will have their respective Share in the said ancestral property.  If the Adoptive father being your client desires to  give his share out of the said ancestral property ,  then he can do so by way of  Gift or Will or by way  of transfer.  This has nothing to with the Adoption Deed and hence if the said Deed is not registered then also, it's not required to be register at this moment.  However, if there is any self acquired property of the adopted father, he can at any time give the same fully or partially to his adopted daughter by way of Gift, nomination, Will or by way of transfer.

thank you very much. my client is willing to give his share of the property.

But still i want to know that whether the adoption deed be registered after attaining majority(of the adopted child) or after marriage of the said adopted child.