论文部分内容阅读
【目的】Ynbs株系是M7代裸大麦穗分枝突变体,其穗分枝等性状可稳定遗传,但未见Ynbs株系变异性状表型差异和关联分析的报道。【方法】以9份Ynbs株系、13份重组自交系、1份诱变亲本、1份Prbs突变体为材料,利用SPSS 19.0软件分析了不同材料间11种农艺性状的表型差异及其相关性。【结果】不同Ynbs株系具有小穗退化、小花数增多和结实率下降等8个变异性状,其小穗数(10.53±0.53~13.23±0.22)和结实率(11.30±3.71)%~(42.40±3.61)%极显著低于诱变亲本和重组自交系(P<0.01),但其小花数(123.00±20.06~193.90±14.48)极显著高于诱变亲本和重组自交系(P<0.01),9份Ynbs株系与其他15份材料间具有明显的遗传分化;在24份大麦材料中穗分枝分别与小穗数、结实粒数或穗茎轴长显著(P<0.05)或极显著(P<0.01)偏相关,偏相关系数分别为-0.599、0.548、-0.652。【结论】Ynbs株系具有包括穗分枝、小穗退化、小花数增多和结实率下降4个共有特性,其穗分枝分别与小穗退化、小花数增多或结实率下降关联遗传,是大麦穗分枝发育等研究的重要基因资源。
【Objective】 Ynbs strain is a branch mutant of naked barley in M7 generation. Its ear branches and other traits can be inherited stably. However, there is no phenotypic difference and correlation analysis of Ynbs strains. 【Method】 The phenotypic differences of 11 agronomic traits among 9 different Ynbs lines, 13 inbred lines, 1 mutagenized parent and 1 Prbs mutant were analyzed by using SPSS 19.0 software Correlation. 【Result】 The results showed that there were 8 variation traits of spikelet degeneration, small flower number and seed setting rate in different Ynbs lines. The spikelet number (10.53 ± 0.53 ~ 13.23 ± 0.22) and the seed setting rate (11.30 ± 3.71) ~ (42.40 ± 3.61)% was significantly lower than that of mutagenic parents and recombinant inbred lines (P <0.01), but the number of floret (123.00 ± 20.06 ~ 193.90 ± 14.48) was significantly higher than that of mutagenic parents and recombinant inbred lines (P < 0.01). Nine lines had obvious genetic differentiation with 15 other materials. In 24 barley cultivars, the number of spike branches was significantly higher than that of spikelets, grain number or shaft length (P <0.05) or (P <0.01), and the partial correlation coefficients were -0.599, 0.548 and -0.652, respectively. 【Conclusion】 There are four common characteristics of Ynbs line, including panicle spike, spikelet degeneration, small number of flowers, and decreased seed setting rate. The ear branches are related to the degeneration of spikelets, the increase of the number of florets, or the decline of seed setting rate respectively. Spike branch development and other important genetic resources.