[Purpose] Ynbs line is a spike branch mutant of naked barley in M7 generation,and their some traits including spike branch can be stable inheritance from one generation to another,but the difference of these mutant traits between Ynbs lines and the association between different mutant traits of Ynbs lines have not be reported so far.[Method] Twenty-four materials including 9 Ynbs lines, 13 recombination inbred lines, 1 mutant parent and 1 prbs mutant,were be planted in a completely randomized block with 3 repetitions,SPSS 19.0 was employed to analyze the phenotypic difference of 11 traits between 24 materials, and the association between these traits.[Results] Nine traits including the spike degeneration, floret increase and seed setting rate decrease were mutant traits for 9 Ynbs lines. The spike number and seed setting rate of 9 Ynbs lines ranged from 10.53±0.53 to 13.23±0.22, from 11.30%±3.71% to 42.40%±3.61%, respectively, and were both extremely significantly(P<0.01) lower than those of mutant parent and recombination inbred lines. But the floret number of 9 lines ranged from 123.00±20.06 to 193.90±14.48, and was extremely significantly(P<0.01) higher than that of mutant parent and recombination inbred lines. The obvious genetic difference showed between 9 Ynbs lines and the others materials. In 24 barley materials, a significant partial correlation(P<0.05) between the spike branch and the number of multiple spike, spike branch and number of grain, and an extremely significant partial correlation(P<0.01) between spike branch and spike stem axes length were confirmed,respectively, 3 partial correlation coefficients reached at -0.599, 0.548, -0.652,respectively. Nine Ynbs lines carry 4 common traits including spike branch, multiple spike degeneration, floret increase and seed setting rate decrease.[Conclusion] The inheritance of spike branch in Ynbs lines is associated to that of spike degeneration, of floret increase and of seed setting rate decrease, respectively,Ynbs line is an important resource for these studies including the developmental inheritance of spike branched in barley.
WANG Jiaxi, LI Jingye, CHEN Shengwei, MO Fan, LI Yingqiu, PU Xiongyan, WU Haiyan, HUANG Wenfu, LUO Ping.The Identification of Mutant Traits of 9 Naked Barley Lines with Spike Branch and the Analysis of the Association between These Mutant Traits[J] Journal of Yunnan Agricultural University, 2017,V32(3): 387-394
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