The several studies have shown that the genetic base of upland and irrigated Brazilian rice cultivars is narrow. It is recommended, therefore, to amplify it, reducing genetic vulnerability and increasing yield. In the present work, genealogies of Brazilian upland rice cultivars recommended for 1997/98 for natural and supplementary - irrigation conditions were elaborated, and genetic contribution of their ancestors was estimated. This information is very important in rice breeding programs in order to plan crossings.
upland rice; genealogy; parentship; genetic base
