Diversity and Potential of Oryza glaberrima Steud in Upland Rice Breeding.
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概要
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Oryza glaberrima Steud, the indigenous domesticated Oryza species in West Africa, is a potential source of useful genes for a range of economically important characters. Progenies from interspecific hybridization of O. sativa and O. glaberrima show high sterility in the F<SUB>1</SUB> hybrids and early generations. However, in some populations fertility was obtained(5-95%)and retained after two to four back-crossings. Although true intermediates between O. glaberrima and O. sativa were generally rare, their occurence in some populations was as high as 30%. Desirable morphological traits introgressed from O. glaberrima into segregating BC<SUB>2</SUB> F<SUB>3</SUB> populations included early maturity(75-100 days), rapid seedling growth and high tillering.
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