IMPROVEMENT OF QUALITY AND RUST RESISTANCE IN ELITE BREAD WHEAT CULTIVARS WITH 1RSWR.1BL RECOMBINANT LINE USING MARKER ASSISTED BREEDING Abstract uri icon

abstract

  • Crop improvement and crop protection are the two major thrust areas which have always been of keen interest for breeders. Improvement of bread making quality and rust resistance, while retaining the yield is the main goal of the present study. The 1RS.1BL translocation, known for its multiple disease resistance and abiotic stress tolerance was found to have deteriorating effect on the bread making quality due to the presence of Sec-1 locus on 1RS encoding rye storage protein known as secalin. The absence of Glu-B3/Gli-B1 on 1BS further reduced the dough strength. In this study elimination of secalin along with the mitigation of the loss of Glu-B3/Gli-B1 was achieved using a 1RSWR.1BL recombinant translocation in Hahn background (W1635) as the donor parent. W1635 is without secalin and has Yr5 and Yr17 genes for rust resistance along with an overexpressed Glu1-Bx7 allele (Bx7OE), known for improving bread making quality. The two elite bread wheat cultivars HS240 and UP2338, with 1RS.1BL were used as the recipient parents. Two sets of BC1F6 derivatives UP2338/W1635//UP2338 and HS240/W1635//HS240 have been developed. These derivatives are without secalin and had introgression of rust resistance genes Yr5, Yr17 or both along with Bx7OE allele. High micro SDS sedimentation test (MST) values of the derivatives indicated the role of Bx7OE in improving the bread making quality.

publication date

  • July 2019