The breeding of restorators male fertility for receiving hybrids F1 of winter rye

In the breeding of winter rye on the basis of CMS sterile cytoplasm of P-type which distinctive feature is low frequency of restorators of fertility is widely used. It creates certain difficulties in the breeding of hybrid rye. Detection of new effective restorators of male fertility in sterile cytoplasm of P-type was the purpose of the conducted researches. Evaluated an index of restoration of fertility (RI) at the test cross connects received from crossing of 16 two-line synthetics and 21 inbred lines with the line N-1185 taken as tester CMS. At test cross connects with an involvement of inbred lines the RI index varied from 8,4 to 86,1%, and at test cross connects with an involvement of synthetics - from 12,2 to 90,0%. It is set that the majority of the studied synthetics and inbred lines only partially recovered male fertility in test crossings. Almost complete restoration of pollen fertility (at the level of % RI > 67) was shown only by 7 synthetic from 16 and 2 inbred lines from 21. The special attention is deserved C-8090/12 synthetics (RI = 90,0%) and C-8082/12 (RI = 88,4%), and also by the N-663 and N-649 lines which appeared the partial restorators of fertility. They are of interest to breeding of pollen parents of commercial hybrids. Dedicated lines of N-451, N-732 and N-1185 which showed almost complete fixing of sterility (RI = 0,9 ... 1,6%). The prospects their use in breeding of hybrid winter rye are discussed.

гибридная рожь, синтетик, инбредная линия, цитоплазматическая мужская стерильность, восстановитель фертильности, закрепитель стерильности, индекс восстановления, hybrid гуe, synthetic inbred line, cytoplasmatic male sterility, fertility restoration, sterility fixer, restoration index