Abstract
Controlled pollination in root and tuber crops is challenging. Complex ploidy, cross-incompatibility, erratic flowering patterns, outcrossing, etc., limit the efficiency of breeding progress in these crops. Half-sib breeding that involves random pollination among parents is a viable method to harness genetic gain in outcrossing crops that are problematic for performing planned and controlled pollination. The authenticity of resulting progenies from the half-sib breeding is essential to monitor the selection gain in the breeding program. Parentage analysis facilitated by molecular markers is among the available handy tools for crop breeders to maximize genetic gain in a breeding program. It can help to resolve the identity of half-sib progenies and reconstruct the pedigree in the outcrossing crops. This paper reviews the potential benefits of parentage analysis in breeding selected outcrossing root and tuber crops. It assesses how paternity analysis facilitates breeding activities and the ways it improves genetic gain in the root and tuber breeding programs. Conscious use of complementary techniques in the root and tuber breeding programs can increase the selection gain by reducing the long breeding cycle and cost, as well as reliable exploitation of the heritable variation in the desired direction.
Highlights
Root and tuber crops are important crops with increasing food, feed and industrial applications inSub-Saharan Africa and many other regions of the world [1,2,3]
We review the application and potential of parentage analysis to facilitate breeding activities in selected root and tuber crops
GBS is an enzyme-based complexity reduction technique that utilizes restriction endonucleases targeted at a small portion of the genome and DNA barcoded adapters for the production of multiplex libraries of samples used in next-generation sequencing (NGS)
Summary
Root and tuber crops are important crops with increasing food, feed and industrial applications in. Traditional breeding in root and tuber crops often utilizes open pollination by wind or insects to generate sufficient families with unstructured pedigree and subsequent selection of progeny. This method is not efficient for high quality true seed production, identification of parents that. Pedigree reconstruction is necessary for enhanced breeding and genetic studies Such information will help with the estimation of reliable heritability and genetic correlation parameters in open pollinated plants to maximize genetic gain and design efficient breeding program. It ascertains the genetic identity of mislabeled genotypes used in breeding programs. We review the application and potential of parentage analysis to facilitate breeding activities in selected root and tuber crops
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