TITLE:
Genetic Relationship between Sweet Grain Sorghum and the Other Sorghum Types Cultivated in Burkina Faso Assessed with Nuclear Microsatellite Markers SSRs
AUTHORS:
Josiane Tiendrebéogo, Nerbéwendé Sawadogo, Mariam Kiébré, Zakaria Kiébré, Sévérin Tuina, Tégawendé Alphonse Sawadogo, Kiswendsida Romaric Nanema, Renan Ernest Traoré, Mahamadi Hamed Ouédraogo, Mahamadou Sawadogo
KEYWORDS:
Sorghum, Markers, Genetic Diversity, Phylogeny, Burkina Faso
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.13 No.6,
June
30,
2022
ABSTRACT: In Burkina Faso, sweet grain sorghum [Sorghum bicolor (L.) Moench] is
generally cultivated in association with several other types of sorghum.
However, the lack of information on the genetic relationship between this
sorghum and grain sorghum as well as sweet stalk sorghum hinders the efficient
management of its genetic resources. Thus, 34 sorghum accessions consisting of
14-grain sorghum, 10-sweet stalk sorghum, and 10 sweet grain sorghum were
evaluated using 15 nuclear microsatellites markers (SSRs) to determine their
genetic relationship. Results revealed significant genetic diversity within
each sorghum type and a significant index of genetic differentiation per pair
of sorghum types (0.017) between sweet grain sorghum and sweet stalk sorghum.
The minimum Nei distance was also high (0.12) between these two sorghum types.
Sweet grain sorghum indeed showed the lowest values of theoretical
heterozygosity (0.35), of observed heterozygosity (0.13). Structuring of the
accessions of the three types of sorghum cultivated in two distinct groups, one
of grain sorghum and sweet stalk sorghum and another consisting of accessions
of grain sorghum and sweet grain sorghum was also obtained. The low differentiation observed would suggest greater genetic
proximity between the three types of sorghum. The differences observed would be
more of a physiological and biochemical nature. These results could
contribute to better management of the genetic
resources of sweet grain sorghum.