818 resultados para Asian soybean rust
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This report outlines the strategic plan for Commission and Division on the Status of Iowans of Asian and Pacific Islander Heritage (CAPI) Strategic Plan including,goals and mission.
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• According to the US Census Bureau 18.9 million Asians live in the US today (2012) • The Asian population rose by 530,000 or 2.9 % making it the fastest growing population in the US, exceeding the growth rate of Latino population which grew at 2.2% in 2012. • More than 60% of this growth is accounted by international migration. • Native Hawaiians and Pacific Islanders are growing at a rate of 2.2% totaling of 1.4 million
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The objective of this work was to determine soybean resistance inheritance to Heterodera glycines Ichinohe (soybean cyst nematode - SCN) races 3 and 9, as well as to evaluate the efficiency of direct and indirect selection in a soybean population of 112 recombinant inbred lines (RIL) derived from the resistant cultivar Hartwig. The experiment was conducted in a completely randomized design, in Londrina, PR, Brazil. The estimated narrow-sense heritabilities for resistance to races 3 and 9 were 80.67 and 77.97%. The genetic correlation coefficient (r g = 0.17; p<0.01) shows that some genetic components of resistance to these two races are inherited together. The greatest genetic gain by indirect selection was obtained to race 9, selecting to race 3 due to simpler inheritance of resistance to race 9 and not because these two races share common resistance genes. The resistance of cultivar Hartwig to races 3 and 9 is determined by 4 and 2 genes, respectively. One of these genes confers resistance to both races, explaining a fraction of the significant genetic correlation found between resistance to these SCN races. The inheritance pattern described indicates that selection for resistance to SCN must be performed for each race individually.
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The objective of this work was to evaluate the soybean inheritance of resistance to cyst nematode races 3 and 14. The following populations where evaluated: one population of recombinant inbred lines (RILs) [Hartwig (resistant) x Y23 (susceptible line)] for races 3, 14 and 9; one population of families F2:3 [M-SOY 8001 (resistant) x MB/BR 46 - Conquista (susceptible)] for race 3; and one population of families F2:3 [(S5995 (resistant) x BRSMG Renascença (susceptible)] for race 14. In RIL populations, four epistatic genes were identified which conditioned resistance to race 14, and three epistatic ones for resistance to races 3 and 9. The lack of one gene provided moderate resistance under all situations. The highest number of genes for resistance to race 14 points out that genes responsible for lower effects might be involved. In population F2:3 from M-SOY 8001 x MB/BR 46 - Conquista, one recessive gene for moderate resistance and two recessive genes complete resistance to race 3 were identified. Two recessive genes conditioning moderate resistance to race 14 were identified in population F2:3 from the crossing S5995 x BRSMG Renascença. These results will be useful in designing crossings, involving these parentals, with higher possibility to accumulating genes that provide resistance to several SCN races.
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Demographic profile of the Iowa population Asian and Pacific Islander descent.
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Demographic profile of the Iowa population Asian and Pacific Islander descent.
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Demographic profile of the Iowa population Asian and Pacific Islander descent.
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Demographic profile of the Iowa population Asian and Pacific Islander descent.
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Demographic profile of the Iowa population Asian and Pacific Islander descent.
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Demographic profile of the Iowa population Asian and Pacific Islander descent.
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Demographic profile of the Iowa population Asian and Pacific Islander descent.
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Demographic profile of the Iowa population Asian and Pacific Islander descent.
Resumo:
Demographic profile of the Iowa population Asian and Pacific Islander descent.
Resumo:
Demographic profile of the Iowa population Asian and Pacific Islander descent.
Resumo:
Demographic profile of the Iowa population Asian and Pacific Islander descent.
