The possibility of transferring of rhizomania resistance genes from genetically broad based populations and varieties into sugar beet lines

Shahbazi, H. A.; Sadeghian, S.Y.; Ahmadi, M.; Soltani, J.

doi:10.22092/jsb.2010.757

The possibility of transferring of rhizomania resistance genes from genetically broad based populations and varieties into sugar beet lines

Document Type : Scientific - Research

Authors

¹ Instructor of Agricultural and Natural Resources Research Centre- Khorasan Razavi

² Professor of Seed and Plant Certification Institute

³ Assistant professor of Sugar Beet Research Department, Khorasan Razavi Agricultural and Natural Resources Research Center, AREEO, Mashhad, Iran.

⁴ Instructor of Sugar Beet Research Department, Khorasan Razavi Agricultural and Natural Resources Research Center, AREEO, Mashhad, Iran.

10.22092/jsb.2010.757

Abstract

In order to transfer rhizomania resistance genes to improved sugar beet lines, crosses were made between 11 commercial resistant varieties and two improved inbred O-type lines of sugar beet (231 and 261) at Agricultural Research Center of Khorasan Razavi and Jam sugar factory in 2007. O-types carried self fertile (Sf) genes and contained male sterile (MS) genotypes. Commercial varieties were used as pollinators and inbred lines as female parents. Males and females were examined for the amount of hybrid seeds production, yellowish color of leaves and infection index of rhizomania on the root. However, seeds were harvested from 299MS plants within O-types. Males and females were compared based on the amount of viable seeds produced on each plant. The results showed that females did not represent significant differences although the line 261 produced 54.2 percentages of hybrids with enough viable seeds when compared to the line 231 with 45.8 percentages. Pollinators were significantly different at 5 percentages probability level in respect of producing consequent hybrids with enough seeds. Scales of yellow color of leaves and resistance index of roots were statistically similar to the growth period of plants. The results displayed that crosses originated from various pollinators reacted differently (at 5% probability level) to yellow color change of leaves and root infection index to rhizomania during the growth period. The lowest percentage of green leaf belonged to the population No. 8 and the highest to No. 7 that figured about 0 and 80.8 percentages, respectively. The highest disease resistance index appeared for the No. 7 and the lowest for pollinators like numbers 2, 8,10 and 11; but progenies of test crosses resulted from populations No. 3,4 and 5 were also ranked in the resistant group. Therefore, progenies obtained from later mentioned populations have higher potential than others in transferring resistance genes into sugar beet lines. The results displayed that crosses originated from various pollinators reacted differently (at 5% probability level) to yellow color change of leaves and root infection index, but females(231 and 261) did not represent significant differences.

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