Figure 7.

Seed yield of new-type B. juncea lines, traditional B. juncea accessions and the hybrids between them. The spring crop data were collected from nine F₃ lines of new-type B. juncea, eight cultivars of traditional B. juncea, and six hybrids between the new-type B. juncea lines and traditional B. juncea accessions at the spring-type growing environment in 2012 (environment abbreviation as 12S), and the winter crop data were collected from 10 F₃ lines of new-type B. juncea, five cultivars of traditional B. juncea, and 10 hybrids in 2012–2013 at the winter-type environment (environment abbreviation as 12W). The winter crop data for 2013–2014 and 2014–2015 in the winter-type environment (environment abbreviation as 13 and 14W) were successively collected from eight F₄ and 10 F₅ lines of new-type B. juncea, five and seven cultivars of traditional B. juncea, and 13 and 21 derived hybrids, respectively (for more detail, see Supplementary Table 10).