Genetic analysis of dwarf gene for dwarf mutant“819” in Panicum miliaceum L.

doi:10.3969/j.issn.1004-1524.2020.01.03

›› 2020, Vol. 32 ›› Issue (1): 20-27.DOI: 10.3969/j.issn.1004-1524.2020.01.03

• Crop Science • Previous Articles Next Articles

Genetic analysis of dwarf gene for dwarf mutant“819” in Panicum miliaceum L.

JIA Xiaoping¹, WANG Zhenshan¹, ZHU Xuehai^2,*, YANG Dezhi², KOU Shujun², LIU Xingxing¹

1. College of Agronomy, Henan University of Science and Technology, Luoyang 471000, China;
2. Institute of Broomcorn Millet, Zhangjiakou Academy of Agricultural Sciences, Zhangjiakou 075000, China

Received:2019-08-01 Online:2020-01-25 Published:2020-03-11

Abstract

Abstract: In order to uncover the genetic characteristics of dwarf gene from a dwarf mutant “819”, and provide theoretical basis for the subsequent locating of dwarf mutant gene ten traits' including plant height, ear length, neck length, tiller number, stem node number, length of second panicle branch 1, length of second panicle branch 2, length of second panicle branch 3 and so on were investigated for Panicum miliaceum L. crossing parents dwarf mutant “819”, high-stem material J12 and their 674 F₂ individuals, and further variance analysis, cartesian inspection, correlation and regression analysis, principal component analysis were performed for these traits. The results showed that dwarf trait of dwarf mutant “819” was a recessive trait controlled by a single gene. A significantly positive correlation was found between plant height and ear length, tiller number, stem node number, secondary branch length 1, secondary branch length 2, secondary branch length 3, secondary branch distance 1 (P<0.01), and a significant positive correlation was found between plant height and secondary branch spacing 2 (P<0.05). The regression equation of plant height (Y) and other agronomic traits was as follow: Y=-18.446+1.491X₁+1.222X₂+6.827X₄+1.319X₇+0.746X₈, and the fitting degree of which was 0.811. The regression equation reached significant level (P<0.01) and could be used to predict the plant height. Three principal components were obtained by principal component analysis for 10 characters of F₂ population, which accounted for 72.656% of the cumulative contribution rate. These three principal components were named as length factor, stem node number factor and branch spacing factor respectively. The results above provided basis for locating dwarf gene and evaluating, selecting of dwarf offsprings.

Key words: Panicum miliaceum L., dwarf mutant 819, genetic analysis, principal component

CLC Number:

S516

JIA Xiaoping, WANG Zhenshan, ZHU Xuehai, YANG Dezhi, KOU Shujun, LIU Xingxing. Genetic analysis of dwarf gene for dwarf mutant“819” in Panicum miliaceum L.[J]. , 2020, 32(1): 20-27.

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Genetic analysis of dwarf gene for dwarf mutant“819” in Panicum miliaceum L.

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