Inheritance of leaf resistance to Sclerotinia sclerotiorum in Brassica napus and its genetic correlation with cotyledon resistance

Genetic and Proteomic Basis of Sclerotinia Stem Rot Resistance in Indian Mustard [Brassica juncea (L.) Czern & Coss.]

“…The partial dominance of susceptibility over resistance was again confirmed when the mean lesion length of the F 1 generation was compared with their respective mid-parent values. A similar result was also reported by Baswana et al [57] in cauliflower, while overdominance of susceptibility in Brassica napus was delineated by Khan et al [58,59]. Similar to Khan et al [59] and Zhao et al [60], we also observed transgressive segregants for resistance in F 2 and BC 1 P 1 generations of both populations.…”

“…However, the value of h 2 ns was higher than h 2 bs in C-I, which might be due to counteracting effects of additive and dominance genetic variance. Khan et al [58] observed moderate broad-sense heritability for leaf resistance against S. sclerotiorum in oilseed rape. However, the estimates of the genetic parameters, viz., heritability and genetic advance together, are highly desirable for more accurately predicting the genetic gain under selection.…”

Genetic and molecular analysis of stem rot (Sclerotinia sclerotiorum) resistance in Brassica napus (canola type)

“…While stem infection is primarily a consequence of ascospore showers at flowering [ [9] , [10] , [11] , [12] ], carpogenic germination of sclerotia in the soil can also result in direct stem-base infection, particularly in India [ 6 ]. S. sclerotiorum also readily attacks foliage, of both younger plants including cotyledons and leaves [ [13] , [14] , [15] ], and stems in adult Brassicaceae [ 16 ]. Importantly, the expression of stem resistance differs within the breeding populations of B. napus and B. juncea from India and China [ 17 ].…”

“…Importantly, the expression of stem resistance differs within the breeding populations of B. napus and B. juncea from India and China [ 17 ]. The response of a particular host to a pathogen can also differ at different plant ages [ 14 , 15 , 18 ].…”

“…Recent studies towards understanding the inheritance of resistance across different plant growth stages against this pathogen has been an important first step [ 14 , 15 ]. However, finding improved stem resistance to S. sclerotiorum has been the major focus over the past two decades [ 4 , 23 , [25] , [26] , [27] , [28] , [29] , [30] , [31] , [32] ].…”