The results and perspectives for breeding of the green manure narrow-leafed lupine varieties for the productivity and morph-and-biological characters

Abstract

The narrow-leafed lupine (Lupinus angustifolius L.) has long been used as a green manure crop. Alkaloid content which is incompatible with forage varieties is a desirable trait for green manure ones. Alkaloids presented in plowed biomass of the green manure lupine have disinfected action for soil resulted in the lower infection of the next crops. The undemanding nature of green manure lupine to growing conditions consists of several features: it is an active nitrogen accumulator and provides 70 % of nitrogen for own needs, and its deeply penetrated root system allows make up the deficit of nutritional substances in arable layer with use of sub-soil horizons. The aim of the study was to reveal perspective narrow-leafed lupine’s green manure varieties and breeding lines for grain and green mass yield, for length of the vegetation season, alkaloid content and other morphological and biological characters. The tests have been done under Bryansk region’s conditions (the South-West zone of the Central region of Russia) on soddy-podzolic loamy cultivated soils with the moderate fertility level. The objects of the research were seven green manure varieties and breeding lines of the narrow-leafed lupine which have been tested in competition tests of 2021-2022. The breeding line Siderat 265-19 stand out for grain (2.62 t/ha), green mass (31.9 t/ha) yield and for early maturing (84 days). Alkaloid content in its seeds made 1.003 %, the standard level. The article presents the results of structural analyses for morphological peculiarities and productivity elements of new green manure hybrid lines (the standard variety – Tshutchinskiy).). The No. 1764 (Siderat 46 x Kormovoy 344) had the best index for plant height. The No. 1749 (Siderat 46 x Bryanskiy siderat) picked out for grain productivity. The seed weight per a plant was 14.3 g and the pod’s seedingwas 5.2 seeds.