Study on the selection of crosses with strong heterosis from wheat-rye recombinant
1999
Wu Wei | Zheng Youliang | Zhou Yonghong (Sichuan Agricultural Univ., Yaan China))
A wheat -rye recombinant, Yiyuan 2 was crossed with 115 varieties or lines. According to grain weight per spike, 22 crosses with strong heterosis were selected out primarily. Therefore, the standard, mid-, male and female parent heterosis of 7 traits, including heading date, plant height, spike number per plant, spikelet number per spike, grain number per spike, 1000 grain weight and grain weight per spike, were analysed respectively. Through comprehensive evaluation, 4 relatively better crosses with strong heterosis, namely SW90-2321/Yiyuan 2, Mianyang 26/Yiyuan 2, 45661/Yiyuan 2 and Mianyang 94-334/Yiyuan2, were selected out. The result showed that Yiyuan 2 was an excellent parent. If it was crossed with another parent with high 1000 grain weight and early mature traits, some strong heterotic hybrid varieties with high yield in accord with breeding goals might be selected out to apply for the production
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