Heterosis and heterotic patterns among maize landraces for forage
نویسندگان
چکیده
منابع مشابه
QTL for Maize Midparent Heterosis in the Heterotic Pattern American Dent × European Flint under Corn Borer Pressure
Despite the importance of heterosis and the efforts to comprehend this phenomenon, its molecular bases are still unknown. In this study, we intended to detect Quantitative trait loci (QTL) for mid-parent heterosis under infestation with the Mediterranean corn borer (MCB, Sesamia nonagrioides Lef.) using a North Carolina design III approach with a RIL population derived from a European flint inb...
متن کاملDeveloping heterotic groups for hybrid breeding in crop plants with emphasizing on forage crops
Exploitation of heterosis in hybrid breeding and development of synthetic cultivars is an essential procedure in plant breeding programs. The main goal of hybrid breeding programs is to select desirable parental genotypes to maximize the expression of heterosis. However, since development of high yielding hybrids and synthetic cultivars are costly and time-consuming, the accurate prediction of ...
متن کاملThe pure-line hybrid concept traces its roots back to experiments on heterosis and its complement in- breeding conducted by SHULL (1908, 1909) at Cold Spring Harbor Laboratories in New York, and EAST
Today the concept of heterotic groups and patterns is fundamental to hybrid breeding theory and practice. Our objectives were to (i) review various hypotheses on the causes of heterosis in maize and on the experimental evidence supporting or refuting them, (ii) examine advantages and disadvantages of the concept of heterotic groups and patterns, (iii) describe the status of heterotic patterns i...
متن کاملHeterosis Is Prevalent for Multiple Traits in Diverse Maize Germplasm
BACKGROUND Heterosis describes the superior phenotypes observed in hybrids relative to their inbred parents. Maize is a model system for studying heterosis due to the high levels of yield heterosis and commercial use of hybrids. METHODS The inbred lines from an association mapping panel were crossed to a common inbred line, B73, to generate nearly 300 hybrid genotypes. Heterosis was evaluated...
متن کاملRelationship among physiological quality, heterosis, and amylase gene expression in maize seeds.
In this study, we analyzed heterosis, amylase enzyme gene expression, and the physiological quality of maize seeds with different genotypes and sizes, which were subjected to aging and not subjected to aging. We used seeds from 2 maize lines that differed with regard to physiological quality, the hybrid, and the reciprocal hybrid; they were classified into 2 sizes and were subjected to aging an...
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ژورنال
عنوان ژورنال: Cropp Breeding and Applied Biotechnology
سال: 2009
ISSN: 1984-7033
DOI: 10.12702/1984-7033.v09n03a04