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Filtering by: Subject Heterosis Resource Type Masters Thesis

Estimates of heterosis for five agronomic traits in selected winter x spring and winter x winter wheat crosses (Triticum aestivum L. em Thell)

Creator:

Brajcich, P.

Abstract:

Concern regarding the lack of genetic variability and the apparent yield plateau reached in wheat breeding have prompted this investigation. The systematic crossing of spring and winter wheat types which have evolved to form somewhat different gene pools, may provide a source of additional usable genetic variability for future yield...

Resource Type:

Masters Thesis
Breed and heterosis effects on wool and lamb production of rotationally crossed ewes

Creator:

Gallivan, Catherine Agnes

Abstract:

One thousand twenty-three lambing records of 351 ewes bred in a rotational crossbreeding system involving Columbia or Targhee, Hampshire and Finnish Landrace breeds were examined. A regression approach was used to determine the effects of breeds and heterosis on wool grade, greasy fleece weight, ewe weight at lambing, lambing date,...

Resource Type:

Masters Thesis
Estimates of heterosis in winter/winter, winter/spring, and spring/spring crosses of barley (Hordeum vulgare L.)

Creator:

Oakley, Stephen Roland

Abstract:

Previous work indicated a substantial heterotic expression for grain yield existed within winter/spring hybrids of barley, This research was a continuation for the comparison of the expression of heterosis within winter/spring hybrids to the heterotic effect produced among the winter and among the spring parents. The F₁ and F₂ progenies...

Resource Type:

Masters Thesis