Mode of inheritance and combining abilities for kernel row number, kernel number per row and grain yield in maize (Zea mays L.)
نویسندگان
چکیده
منابع مشابه
KRN4 Controls Quantitative Variation in Maize Kernel Row Number
Kernel row number (KRN) is an important component of yield during the domestication and improvement of maize and controlled by quantitative trait loci (QTL). Here, we fine-mapped a major KRN QTL, KRN4, which can enhance grain productivity by increasing KRN per ear. We found that a ~3-Kb intergenic region about 60 Kb downstream from the SBP-box gene Unbranched3 (UB3) was responsible for quantita...
متن کاملInheritance of kernel row number, a multicategorical threshold trait of maize ears.
Information about the inheritance of threshold traits is scarce, especially in plants. We examined the genetic control of kernel row number in maize (Zea mays). Knowledge of this inheritance is especially important because it is a primary component of grain yield. This trait has a discontinuous distribution. Characters like these are conceptualized as threshold traits. Crosses were made b...
متن کاملQuantitative trait loci mapping for kernel row number using chromosome segment substitution lines in maize.
Unveiling the genetic architecture of grain yield and yield-related traits is useful for guiding the genetic improvement of crop plants. Kernel row number (KRN) per ear is an important yield component, which directly affects the grain yield of maize. In this study, we constructed a set of 130 chromosome segment substitution lines (CSSLs), using Nongxi531 as the donor parent and H21 as recipient...
متن کاملGrowth and Yield of Maize (zea Mays L.) as Affected by Row Spacing and Weed Competition Durations
A field experiment was conducted for two consecutive years (2003 and 2004) to study the effect of row spacing (75, 65 and 55cm) and different weed competition durations (0, 15,30,45,60 days after emergence and throughout the growth period) on weeds density and biomass and growth and yield of maize. Reducing row spacing significantly suppressed the weed density and biomass. The maximum reduction...
متن کاملEstimation of heterosis for grain yield components in Maize (Zea mays L.)
Heterosis plays an important role in achieving improvement in crop production. About 69 F 1 hybrids obtained by crossing twenty three lines and three testers in a line × tester fashion were used to derive the information on degree of heterosis over mid, better and standard parent in maize. Sixty nine crosses and their parents including one check CoH(M)5 were evaluated in a Randomized Block Desi...
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ژورنال
عنوان ژورنال: ABI Genetika
سال: 2010
ISSN: 0534-0012,1820-6069
DOI: 10.2298/gensr1001167b