Genetic dissection of yield-related traits and mid-parent heterosis for those traits in maize (Zea mays L.).

ABSTRACT:

Background

Utilization of heterosis in maize could be critical in maize breeding for boosting grain yield. However, the genetic architecture of heterosis is not fully understood. To dissect the genetic basis of yield-related traits and heterosis in maize, 301 recombinant inbred lines derived from 08 to 641 × YE478 and 298 hybrids from the immortalized F₂ (IF₂) population were used to map quantitative trait loci (QTLs) for nine yield-related traits and mid-parent heterosis.

Results

We observed 156 QTLs, 28 pairs of loci with epistatic interaction, and 10 significant QTL × environment interactions in the inbred and hybrid mapping populations. The high heterosis in F₁ and IF₂ populations for kernel weight per ear (KWPE), ear weight pe

SUBMITTER: Yi Q 

PROVIDER: S-EPMC6734583 | biostudies-literature | 2019 Sep

REPOSITORIES: biostudies-literature