| To date, high yield and fine quality are main goals as well as principal contradiction in wheat breeding program. In the present study, two associated recombinant inbred lines (RILs) derived from the crosses Weimai8/Yannong19 and Weimai8/Jimai20 with 229 and 485 lines, respectively, were used as materials to evaluate the correlations for twelve yield related traits and quality traits evaluated in three environments. The correlations were positive between grain yield per plant (GY) with its components (YC, full filled grain number per panicle, 1000 grain weight and panicle number per plant), spiklets per spike, plant height and processing quality, whereas the correlations were negative between GY with protein content or wet glutenin content. And there were no significant correlations between GY with heading date and flowering period. The correlations between different YC were significantly negative. Grain number per spike and 1,000 grain weight were positively correlated to spiklet per spike and plant height, while spike number per plant was negatively correlated to spiklet per spike. Grain number per spike, spike number per plant and protein content, wet glutenin content were negatively correlated, while were positively correlated to processing quality. However, 1,000 grain weight was positively and negatively correlated with protein content and wet glutenin content, respectively. The results above indicated the existential contradiction between GY and nutritional quality, while GY and processing quality could be coordinated. However, the contradiction between GY and nutritional quality could be resolved by coordinating YC and nutritional quality trait, such as 1,000 grain weight and wet glutenin content. The correlations between traits in the two RILs were of some difference, and between different environments the discrepancies were obviously and even was in opposite, demonstrating the influences of genetic background and the environmental factors, such as soil condition, climate, etc. |
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