Inheritance of soybean resistance to soybean rust in Uganda’s soybean germplasm
Journal Title: International Journal of Agronomy and Agricultural Research (IJAAR) - Year 2018, Vol 12, Issue 1
Abstract
Understanding the genetic mechanisms of soybean rust resistance is important for effective selection and breeding procedures. This study was hence conducted to determine the combining ability and gene action controlling soybean rust using a 10×10 half diallel mating design. The F2 segregating populations along with their parents were evaluated for rust severity and sporulation level at two reproductive stages (R4 and R6) in screen house and field conditions during the second season of 2016 and first season of 2017 at MUARIK using an alpha lattice design replicated thrice. Significant differences were observed among the parents and F2 generations for both disease severity and sporulation level. General and specific combining abilities were highly significant. The GCA/SCA ratio (1.50-2.30) and the Baker’s ratio (0.75-0.82) showed the predominance of additive gene action in the inheritance of soybean rust resistance. The broad-sense (0.94-0.99) and narrow-sense (0.73-0.82) heritability estimates indicated the possibility of improving resistance to soybean rust through selection in the early generations. UG 5, Maksoy 3N, Maksoy 4N and Maksoy 5N had negative GCA effects. The F2 populations derived from these parents crossed with Wonder soya and Nam 2 had also negative SCA effects. The use of these parents and F2 populations can, therefore, increase the response to selection for improving resistance to soybean rust.
Determination of pesticide residues in eggplant using modified QuEChERS Extraction and Gas chromatography
Food poisoning through pesticide contamination is a burning issue now a days all over the world. Peoples are suffering and dying in a large number from this problem every year. It is also a threat to the future generatio...
Efficacy of petroleum spray oils in management of powdery mildew in garden pea
Garden pea (Pisum sativum) is an important vegetable grown in Kenya, for both domestic and export market. Its production is hindered by diseases such as powdery mildew (Erysiphe polygoni), mainly controlled using chemica...
Productivity and fodder potentials of groundnut in the Sudanian zone of Benin
Agronomic performance of groundnut differs according to variety. The objective of the study was to determine the productivity, the fodder and the nutritional potentials of haulms of four varieties of groundnut. A systema...
Diversity of plant parasitic nematodes associated with common beans (Phaseolus vulgaris) in the Central Highlands of Kenya | IJAAR
Common beans (Phaseolus vulgaris L.) are the most important legume staple food in Kenya coming second to maize. In Central Highlands of Kenya, the 0.4-0.5ton ha-1 output is below the genetic yield potential of 1.5-2ton h...
Inheritance of soybean resistance to soybean rust in Uganda’s soybean germplasm
Understanding the genetic mechanisms of soybean rust resistance is important for effective selection and breeding procedures. This study was hence conducted to determine the combining ability and gene action controlling...