31. The flowers of the " Hibiscus trionum " can set seed via both outcrossing and self-pollination. 32. If the outcrossing is limited and populations are large enough, selective pressure acting on each generation can restore fitness. 33. The flowers of " B . sessilis " have a number of adaptations that serve to encourage outcrossing . 34. Outcrossing is not necessarily done with the intent of producing more white cubs by resuming inbreeding further down the line.35. The effective selfing model relaxes this assumption by seeking also to estimate the degree of shared ancestry of outcrossing mates. 36. A few species, such as " B . brownii ", are exceptional in having low outcrossing rates. 37. Outcrossing would provide the benefit of masking the expression of deleterious recessive mutations in progeny . ( Also see complemenation .)38. This assumption is often violated in wild plant populations, where inbreeding may be due to outcrossing between closely related plants. 39. While generally a self-pollinating perennial, the rate of outcrossing varies among " Elymus caninus " populations. 40. Outcrossing to other breeds has never been a temptation since the Chilean Horse is well-suited for the Chilean rodeo sport.