Quantitative Methods for Selection from F＜sub＞1＜／sub＞ Generation in Wheat Cross Breeding

doi:10.3321/j.issn:1000-7091.1998.01.002

Abstract

Abstract: Quantitative methods for evaluating the sum of squares(SS)and the sum of absolute values(SA)used for testing the difference between multiple traits of F₁and breeding objectives were put forward for evaluating and selecting F₁ crosses in wheat cross breeding.In the program，SS= ∑ni_wi(F_li-I_i)²/max(F_li-I_i)²and SA=∑ni_wi(|F_li-I_i|/max|F_li- I_i|)，and the smaller the values of SS or SAis，the better the F₁ crossis.Using them ethods or SS and SA，32 crosses of F₁ from wheat breeding for yield were analysed with testing their effects by actual selection in F₂ generation.The results showed that F₁ crosses can be well evaluated with the methods and F₁ can be graded while part of crosses in F₁ generation can be eliminated

Key words: Wheat, Cross breeding, Quantitative selection, Early selection

CLC Number:

S512.1

Li Sishen, Li Anfei, Wang Ying, Li Xianbin, Li Qingqi. Quantitative Methods for Selection from F＜sub＞1＜／sub＞ Generation in Wheat Cross Breeding[J]. ACTA AGRICULTURAE BOREALI-SINICA, 1998, 13(1): 6-12. doi: 10.3321/j.issn:1000-7091.1998.01.002.

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