Heterotic loci for various morphological traits of maize detected using a single segment substitution lines test-cross population

Identification of heterotic loci associated with grain yield and its components using two CSSL test populations in maize

“…have found that 25% of QTLs and 30% of HL associated with plant height in an IF 2 population in maize had the same chromosomal locus. In another study in maize, Wei et al 61. have determined that only 27.03% of HL associated with five morphological traits were located in the same position as a corresponding QTL (24.39%).…”

“…HL associated with one of the six measured traits were considered to exist in the test inbred line in the chromosomal region corresponding to the region between the receptor parent and donor parent when the value of the measured trait in the single test hybrid (T 1 or T 2 ) differed significantly from that of its corresponding hybrid, lx9801 × Zheng58 (CK 1 ; p  < 0.05) or lx9801 × Xun9058 (CK 2 ; p  < 0.05), according to one-way ANOVA and Duncan’s multiple comparisons61. The over-standard heterosis effect was calculated as follows: HL% = (H 1  − CK 1 )/CK 1  × 100%, or (H 2  − CK 2 )/CK 2  × 100%, where H 1 and H 2 refer to the values of the trait of the single cross in the CSSL × Zheng 58 and CSSL × Xun9058 populations, and CK 1 and CK 2 are the values of the trait for the hybrids lx9801 × Zheng 58 and lx9801 × Xun9058, respectively46.…”

Heterotic loci identified for plant height and ear height using two CSSLs test populations in maize

“…At the filling period, 10 typical consecutive plants of each experimental material were selected to measure plant height (cm) and ear height (cm) in the field. Plant height was the distance from the ground to the top of tassels, and ear height was the distance from the ground to the node of attachment of the primary ear (Tang et al 2006;Wei et al 2015).…”

“…One-way ANOVA analysis and Duncan's multiple comparisons were conducted using SPSS 17.0 software, and heterotic locus (HL) of plant height and ear height was considered that existed in corresponding chromosomal region between the receptor parent and the donor parent to the test inbred line, when there was a significant difference between the value of the measured trait in single test hybrid (T 1 or T 2 ) and the neighbor corresponding hybrid, lx9801×Zheng 58 (CK 1 ; P<0.05); or lx9801×Xun 9058 (CK 2 ; P<0.05), respectively (Wei et al 2015). The super stand heterotic effect was calculated as follows: HL (%)=(H 1 -CK 1 )/CK 1 ×100, or (H 2 -CK 2 )/ CK 2 ×100, where H 1 and H 2 refer to the values of the trait of the single cross in the CSSLs×Zheng 58 and CSSLs×Xun 9058 populations, and CK 1 and CK 2 refer to the value of the trait for the hybrid lx9801×Zheng 58 and lx9801×Xun 9058, respectively Tang et al 2010).…”

Main Effect QTL with Dominance Determines Heterosis for Dynamic Plant Height in Upland Cotton

“…The results showed dominance and epistasis to be the main contributors to heterosis for plant height in rice. Wei et al (2015) developed a set of 203 single segment substitution lines (SSSLs) and the testcross population was used to identify heterotic loci for the plant height trait in maize. The results showed that heterosis and trait performance was controlled by different genetic mechanisms, and the single-locus overdominance effect was the main contributor to heterosis for plant height in maize.…”