scholarly journals Using xenia in the breeding of rye hybrids

2014 ◽  
Vol 64 (2) ◽  
pp. 175-179 ◽  
Author(s):  
Lechosław Grochowski ◽  
Jan Kaczmarek ◽  
Władysław Kadłubiec ◽  
Henryk Bujak
Keyword(s):  
Seed Production ◽  
Combining Ability ◽  
New Technology ◽  
Inbred Lines ◽  
Hybrid Seed ◽  
Winter Rye ◽  
Hybrid Seed Production

The object of research were: hybrid grains F<sub>1</sub> of winter rye resulting from the topcross of nine yellowseed inbred lines with two testers Madar and Krótka I, and six hybrids F<sub>1</sub> of spring rye resulting from topcross of six Turkish yellowseed populations with the tester SMH-02. The aim of the analysis was to confirm the degree of crossing ability and the effect of xenia of 1000 grains weight. The possibility to breed initial materials characterized by a high combining ability by means of xenia was stated. Xenia of 1000 grains weight allows to elaborate a new technology of hybrid seed production of rye.

Techniques of Hybrid Seed Production in Egg Plant

2001 ◽  
Vol 3 (2) ◽  
pp. 39-47
Author(s):  
Vindhyachal Prasad ◽  
S. K. Dasgupta ◽  
S. K. Tripathi
Keyword(s):  
Seed Production ◽  
Hybrid Seed ◽  
Hybrid Seed Production ◽  
Egg Plant

scholarly journals Molecular regulation ofZmMs7required for maize male fertility and development of a dominant male-sterility system in multiple species

2020 ◽  
Vol 117 (38) ◽  
pp. 23499-23509 ◽  
Author(s):  
Xueli An ◽  
Biao Ma ◽  
Meijuan Duan ◽  
Zhenying Dong ◽  
Ruogu Liu ◽  
...  
Keyword(s):  
Male Sterility ◽  
Seed Production ◽  
Target Genes ◽  
Hybrid Seed ◽  
Molecular Regulation ◽  
Dominant Male ◽  
Hybrid Seed Production ◽  
Maize Breeding ◽  
Pollen Exine ◽  
Multiple Species

Understanding the molecular basis of male sterility and developing practical male-sterility systems are essential for heterosis utilization and commercial hybrid seed production in crops. Here, we report molecular regulation by genic male-sterility genemaize male sterility 7(ZmMs7) and its application for developing a dominant male-sterility system in multiple species.ZmMs7is specifically expressed in maize anthers, encodes a plant homeodomain (PHD) finger protein that functions as a transcriptional activator, and plays a key role in tapetal development and pollen exine formation. ZmMs7 can interact with maize nuclear factor Y (NF-Y) subunits to form ZmMs7-NF-YA6-YB2-YC9/12/15 protein complexes that activate target genes by directly binding to CCAAT box in their promoter regions. Premature expression ofZmMs7in maize by an anther-specific promoterp5126results in dominant and complete male sterility but normal vegetative growth and female fertility. Early expression ofZmMs7downstream genes induced by prematurely expressed ZmMs7 leads to abnormal tapetal development and pollen exine formation inp5126-ZmMs7maize lines. Thep5126-ZmMs7transgenic rice andArabidopsisplants display similar dominant male sterility. Meanwhile, themCherrygene coupled withp5126-ZmMs7facilitates the sorting of dominant sterility seeds based on fluorescent selection. In addition, both thems7-6007recessive male-sterility line andp5126-ZmMs7Mdominant male-sterility line are highly stable under different genetic germplasms and thus applicable for hybrid maize breeding. Together, our work provides insight into the mechanisms of anther and pollen development and a promising technology for hybrid seed production in crops.

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