Fall Season Breeding
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. Resistance of maize landraces from Brazil to fall armyworm (Lepidoptera: Noctuidae) in the winter and summer seasons
ABSTRACT The fall armyworm (Spodoptera frugiperda) is a major maize (Zea mays L.) pest in Brazil, whose larvae cause losses from plant emergence to harvesting stage. This pest has been controlled almost exclusively with chemical insecticides and Bt plants (transgenics); however, resistance evolution has been detected to these two control tactics. Therefore,
Bragantia. Publicado em: 2020-09
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2. Variação nas medidas corporais e desenvolvimento do trato reprodutivo de novilhas de corte recriadas para o acasalamento aos 18 meses de idade
O objetivo deste estudo foi avaliar os efeitos do ganho de peso no período de recria, dos 13 aos 19 meses de idade, em algumas medidas de desenvolvimento corporal de novilhas de corte de reposição, da raça Hereford, mantidas em pastagem nativa. O período experimental foi compreendido entre 15/11/2002 e 23/04/2003. Os tratamentos foram três taxas de gan
Publicado em: 2010
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3. The use of the point count method for bird survey in the Atlantic forest
The point count method has been widely used in tropical forest for sampling bird communities. In the present study, we investigated if data on richness and abundance acquired using the point count method are different comparing spring/summer (breeding season) and fall/winter (non-breeding season) in three types of the Brazilian Atlantic forest. Twelve sites
Zoologia (Curitiba). Publicado em: 2009-03
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4. Recurrent selection in potato for heat tolerance. / SeleÃÃo recorrente em batata visando a tolerÃncia ao calor
All potato cultivars most planted in Brazil come from temperate countries. They are not adapted to the tropical conditions and this results in poorer tuber yields. The objective of this research was to study how recurrent selection can contribute to the development of more adapted potato clones to the tropical climate. The base population (SR0) used in this
Publicado em: 2007
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5. SEASONAL REPRODUCTIVE CHARACTERISTICS OF CRIOLLO MARES IN A STUD FARM ON 2938S LATITUDE IN RIO GRANDE DO SUL / CARACTERÍSTICAS REPRODUTIVAS SAZONAIS DA ÉGUA CRIOULA EM UMA PROPRIEDADE À LATITUDE 2938S NO RIO GRANDE DO SUL
The Criollo Horse breed is gaining increasing importance in our state, due to competition to economic and cultural aspects. However, few studies were developed with this horse breed. Under seasonal and natural photoperiod influence, in a stud farm at 2938 South latitude, the length of gestation, foals heat occurrence and duration of partum to ovulation inter
Publicado em: 2007
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6. Efeito da seleÃÃo natural em alelos microssatÃlites (SSR) do feijoeiro e associaÃÃo com QTLs de caracteres agronÃmicos / Effect of natural selection on common bean SSR alleles and their association with agronomical QTLs.
The objectives of this study were to identify microsatellite (SSR) markers selected by natural selection, and their association with QTLs for grain yield, angular leaf spot reaction and 100 seed weight, in common bean (Phaseolus vulgaris) segreganting populations. One hundred and seven families from the F8 generation and 107 from the F24, derived from the Ca
Publicado em: 2004
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7. Cell death and neuronal recruitment in the high vocal center of adult male canaries are temporally related to changes in song.
Adult male canaries modify their song every year. Most of these changes occur during late summer and early fall, after the end of the breeding season, and in late winter, immediately before the onset of the next breeding season. The high vocal center (HVC) is an important nucleus in the brain pathway that controls this learned behavior. New neurons continue
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8. Timing of brain-derived neurotrophic factor exposure affects life expectancy of new neurons
The high vocal center (HVC) of adult male canaries, Serinus canaria, is necessary for the production of learned song. New neurons are added to HVC every day, where they replace older neurons that have died, but the length of their survival depends on the time of year when they are born. A great number of HVC neurons born in the fall, when adult canaries lear
National Academy of Sciences.
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9. Temporal Stability of Allozyme Frequencies in a Natural Population of DROSOPHILA MELANOGASTER
Seasonal patterns of allozyme variation are examined for 12 polymorphic enzyme loci in Drosophila melanogaster. The data derive from a total of 56 samples taken from a natural population in the Summer and Fall of 1978 and 1979. Samples were obtained at approximately five-day intervals and assayed for 6-phosphogluconate dehydrogenase (6Pgd), phosphoglucomutas